WO2023232666A1 - Solid sorbents for capturing co 2 - Google Patents
Solid sorbents for capturing co 2 Download PDFInfo
- Publication number
- WO2023232666A1 WO2023232666A1 PCT/EP2023/064162 EP2023064162W WO2023232666A1 WO 2023232666 A1 WO2023232666 A1 WO 2023232666A1 EP 2023064162 W EP2023064162 W EP 2023064162W WO 2023232666 A1 WO2023232666 A1 WO 2023232666A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sorbent
- gas
- naphthalenediphosphonate
- mof
- naphthalenediarsonate
- Prior art date
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- 239000002594 sorbent Substances 0.000 title claims abstract description 31
- 239000007787 solid Substances 0.000 title claims abstract description 19
- 239000012621 metal-organic framework Substances 0.000 claims abstract description 74
- 239000007789 gas Substances 0.000 claims abstract description 49
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 81
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 81
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 46
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 45
- MWVTWFVJZLCBMC-UHFFFAOYSA-N 4,4'-bipyridine Chemical compound C1=NC=CC(C=2C=CN=CC=2)=C1 MWVTWFVJZLCBMC-UHFFFAOYSA-N 0.000 claims description 26
- 239000000203 mixture Substances 0.000 claims description 23
- 239000011148 porous material Substances 0.000 claims description 22
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 21
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 15
- 239000004305 biphenyl Substances 0.000 claims description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 12
- 239000001257 hydrogen Substances 0.000 claims description 12
- 229910052739 hydrogen Inorganic materials 0.000 claims description 12
- 230000002209 hydrophobic effect Effects 0.000 claims description 11
- XOSJDFIYAAKXEN-UHFFFAOYSA-N (4-phosphononaphthalen-1-yl)phosphonic acid Chemical class C1(=CC=C(C2=CC=CC=C12)P(O)(=O)O)P(O)(=O)O XOSJDFIYAAKXEN-UHFFFAOYSA-N 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 239000003546 flue gas Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- -1 biogas Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 8
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 7
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 6
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 6
- UEZVMMHDMIWARA-UHFFFAOYSA-M phosphonate Chemical compound [O-]P(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-M 0.000 claims description 6
- 230000002378 acidificating effect Effects 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 238000004729 solvothermal method Methods 0.000 claims description 5
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 claims description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 4
- 239000003345 natural gas Substances 0.000 claims description 4
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 4
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 claims description 4
- 239000005431 greenhouse gas Substances 0.000 claims description 3
- 229910021645 metal ion Inorganic materials 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 claims description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims description 2
- 229910017604 nitric acid Inorganic materials 0.000 claims description 2
- 238000000133 mechanosynthesis reaction Methods 0.000 claims 2
- 238000007144 microwave assisted synthesis reaction Methods 0.000 claims 2
- 238000002360 preparation method Methods 0.000 claims 2
- XMIIGOLPHOKFCH-UHFFFAOYSA-N 3-phenylpropionic acid Chemical compound OC(=O)CCC1=CC=CC=C1 XMIIGOLPHOKFCH-UHFFFAOYSA-N 0.000 claims 1
- 229910002089 NOx Inorganic materials 0.000 claims 1
- 229910001868 water Inorganic materials 0.000 description 45
- 238000001179 sorption measurement Methods 0.000 description 11
- 239000013078 crystal Substances 0.000 description 8
- 239000002904 solvent Substances 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 7
- 238000001027 hydrothermal synthesis Methods 0.000 description 7
- 238000003786 synthesis reaction Methods 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 239000011800 void material Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 4
- XDFCIPNJCBUZJN-UHFFFAOYSA-N barium(2+) Chemical compound [Ba+2] XDFCIPNJCBUZJN-UHFFFAOYSA-N 0.000 description 4
- 150000007942 carboxylates Chemical class 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 4
- 229910000366 copper(II) sulfate Inorganic materials 0.000 description 4
- 238000004375 physisorption Methods 0.000 description 4
- 238000002411 thermogravimetry Methods 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- 230000004913 activation Effects 0.000 description 3
- 125000004429 atom Chemical group 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- 239000003446 ligand Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 238000003775 Density Functional Theory Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 150000001879 copper Chemical class 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000000539 dimer Substances 0.000 description 2
- 238000002003 electron diffraction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 150000003009 phosphonic acids Chemical class 0.000 description 2
- 238000000634 powder X-ray diffraction Methods 0.000 description 2
- 150000003222 pyridines Chemical class 0.000 description 2
- WRHZVMBBRYBTKZ-UHFFFAOYSA-N pyrrole-2-carboxylic acid Chemical class OC(=O)C1=CC=CN1 WRHZVMBBRYBTKZ-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- VNMBEAVFMKRVTQ-UHFFFAOYSA-N (4-arsononaphthalen-1-yl)arsonic acid Chemical compound C1(=CC=C(C2=CC=CC=C12)[As](O)(=O)O)[As](O)(=O)O VNMBEAVFMKRVTQ-UHFFFAOYSA-N 0.000 description 1
- MAWKLXRVKVOYLR-UHFFFAOYSA-N 4-(4-pyridin-4-ylphenyl)pyridine Chemical compound C1=NC=CC(C=2C=CC(=CC=2)C=2C=CN=CC=2)=C1 MAWKLXRVKVOYLR-UHFFFAOYSA-N 0.000 description 1
- XXYMSQQCBUKFHE-UHFFFAOYSA-N 4-nitro-n-phenylaniline Chemical compound C1=CC([N+](=O)[O-])=CC=C1NC1=CC=CC=C1 XXYMSQQCBUKFHE-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 239000012922 MOF pore Substances 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 238000000342 Monte Carlo simulation Methods 0.000 description 1
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 1
- 229910018828 PO3H2 Inorganic materials 0.000 description 1
- WTKZEGDFNFYCGP-UHFFFAOYSA-N Pyrazole Chemical compound C=1C=NNC=1 WTKZEGDFNFYCGP-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- KJNGJIPPQOFCSK-UHFFFAOYSA-N [H][Sr][H] Chemical compound [H][Sr][H] KJNGJIPPQOFCSK-UHFFFAOYSA-N 0.000 description 1
- 238000000184 acid digestion Methods 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- BUSBFZWLPXDYIC-UHFFFAOYSA-N arsonic acid Chemical class O[AsH](O)=O BUSBFZWLPXDYIC-UHFFFAOYSA-N 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- RDVQTQJAUFDLFA-UHFFFAOYSA-N cadmium Chemical compound [Cd][Cd][Cd][Cd][Cd][Cd][Cd][Cd][Cd] RDVQTQJAUFDLFA-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GSOLWAFGMNOBSY-UHFFFAOYSA-N cobalt Chemical compound [Co][Co][Co][Co][Co][Co][Co][Co] GSOLWAFGMNOBSY-UHFFFAOYSA-N 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- JJLJMEJHUUYSSY-UHFFFAOYSA-L copper(II) hydroxide Inorganic materials [OH-].[OH-].[Cu+2] JJLJMEJHUUYSSY-UHFFFAOYSA-L 0.000 description 1
- AEJIMXVJZFYIHN-UHFFFAOYSA-N copper;dihydrate Chemical compound O.O.[Cu] AEJIMXVJZFYIHN-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- GBHRVZIGDIUCJB-UHFFFAOYSA-N hydrogenphosphite Chemical class OP([O-])[O-] GBHRVZIGDIUCJB-UHFFFAOYSA-N 0.000 description 1
- 150000002466 imines Chemical class 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 229920005646 polycarboxylate Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001144 powder X-ray diffraction data Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004467 single crystal X-ray diffraction Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- PWYYWQHXAPXYMF-UHFFFAOYSA-N strontium(2+) Chemical compound [Sr+2] PWYYWQHXAPXYMF-UHFFFAOYSA-N 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 150000003536 tetrazoles Chemical class 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 229910001428 transition metal ion Inorganic materials 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- 229910000391 tricalcium phosphate Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
- 229910000368 zinc sulfate Inorganic materials 0.000 description 1
- 239000011686 zinc sulphate Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/223—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material containing metals, e.g. organo-metallic compounds, coordination complexes
- B01J20/226—Coordination polymers, e.g. metal-organic frameworks [MOF], zeolitic imidazolate frameworks [ZIF]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3085—Chemical treatments not covered by groups B01J20/3007 - B01J20/3078
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/20—Organic adsorbents
- B01D2253/204—Metal organic frameworks (MOF's)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
Definitions
- This invention relates to the provision of metal organic frameworks (MOFs) as solid sorbents to selectively capture gas molecules from the atmosphere or other gases, in particular to capture CO 2 and even more specific in the presence of H 2 O.
- MOFs metal organic frameworks
- CCUS carbon capture, utilization and storage
- MOFs metal organic frameworks
- MOFs that can be used to selectively capture CO 2 are high.
- the desired MOF must be stable in humid conditions, acidic and alkaline conditions and survive at high temperatures.
- MOFs are known to have weak chemical stabilities and thermal stabilities in the presence of humidity and high temperatures. Thus, they will lose their functionality and selectivity under most conditions which are harsher than e.g. at room temperature or any slightly enhanced temperatures as well as at increased percentages of humidity.
- a further limitation to the use of MOFs is to contact them with gases which are not dry.
- MOFs are composed of metal binding functional groups, i.e., carboxylic acids, pyridines, azolates, quinoids that are also capable creating relatively stronger hydrogen bonds with H 2 O molecules.
- Carboxylate MOFs are the most widely studied MOF family and they are generally known to hydrolyze in the presence of water.
- MOFs as potential solid sorbents to selectively capture CO 2 molecules in atmosphere and in flue gas
- an MOF as sorbent for CO 2 in the presence of water is described in EP 2971 277.
- the MOF described therein is known as Calf-20 which is composed of oxalic acid triazolate functional groups (a carboxylate MOF) with molecular formula [Zn 2 (l,2,4- triazolate) 2 (oxalate)].
- Calf-20 is known to perform selective physisorption of CO 2 molecules in the presence of water. However, beginning at 10% relative humidity (RH) the CO 2 loading gradually decreases until it is almost negligible at RH > 30%. Selectivity of Calf-20 for H 2 O and CO 2 becomes equal at 40% RH. Consequently, it is state of the art, MOFs usually use organophosphonate building blocks which were not known to selectively capture CO 2 molecules in the presence of H 2 O even if there are only traces of H 2 O.
- the object of the present invention is to provide solid CO 2 sorbents comprising MOFs.
- This object of the present invention is solved by the provision of MOF as organophosphonates and organoarsonates, and in particular a solid CO 2 sorbent comprising a phosphonate MOF with one of the following molecular formulas [ ⁇ M 2 (4,4’-bipyridine) 0.5 ⁇ (l,4-naphthalenediphosphonate)], [ ⁇ M 2 (4,4’-bipyridine) 0.5 ⁇ (l,4-naphthalenediarsonate)], [ ⁇ M 2 (l,4-Bis(4-pyridyl)benzene) 05 ⁇ (l,4- naphthalenediphosphonate)], [ ⁇ M 2 (l,4-Bis(4-pyridyl)benzene) 05 ⁇ (l,4-naphthalenediarsonate)], [ ⁇ M 2 (4,4 Z -[1,1 Z -Biphen
- the units of the secondary building unit (SBU) and the metal organic framework are preferably unsubstituted, but may be also partially and/or totally substituted by halogenides.
- the MOFs of the present invention were found to selectively capture CO 2 under harsh conditions. Such conditions are e.g. the presence of H 2 O in a gas with 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95 or 100% RH.
- MOFs of the present invention are stable until 360°C allowing the use of hot gases and or industrial waste gases containing CO 2 .
- MOFs can operate from -60°C, -50°C, -40°C, -30°C, -20°C, -10°C, 0°C, 10°C, 20°C, 30°C, 40°C, 50°C, 60°C, 70°C, 80°C, 90°C, 100°C, 110°C, 120°, C130°C, 140°C, 150°C, 160°, C 170°C, 180°C, 190°C, 200°C, 210°C, 220°C, 230°C, 240°C, 250°C, 260°C, 270°C, 280°C, 290°C, 300°C, 310°C, 320°C, 330°C, 340°C, 350°C or 360°C or in any range in between these values.
- a high content of acidic gases like SO 2 , SO 3 , H 2 S, H 2 SO 3 , H 2 SO 4 , HF, HCl, HNO 2 , HNO 3 , NO, NO 2 , NO X in a range from 0 % up to 20 %, alternatively 0.1 - 18%, alternatively 0.5 - 10%, alternatively 0.5 - 15%, alternatively 5 - 15%, alternatively 5 - 10%, alternatively 10 - 15 %, or alternatively 10 - 18%, which would be considered as corrosive or harsh conditions, will be still suitable conditions for the MOFs of the invention and do not destroy the bonds of the compound.
- the solid sorbent comprises [ ⁇ Cu 2 (4,4’-bipyridine) 0.5 ⁇ (l,4- naphthalenediphosphonate)], named hereafter GY-75, is a MOF which selectively captures CO 2 in flue gas. It was found that [ ⁇ Cu 2 (4,4’-bipyridine) 0.5 ⁇ (l,4- na phthalenediphosphonate)] (GY-75) has particularly in presence of H 2 O much higher preference for CO 2 capturing molecules compared to any MOF known in the state of the art . Additionally, it has got even the highest affinity expectation in CO 2 capturing for industry compared to the standards in literature.
- the solid sorbent comprises [ ⁇ Cu 2 (l,4-Bis(4-pyridyl)benzene) 0.5 ⁇ (l,4- naphthalenediphosphonate)], named hereafter GY-76, and is a MOF which selectively captures CO 2 in flue gas (see Figure IF).
- GY-76 is obtained after isoreticular expansion of GY-75 with 1,4- Bis(4-pyridyl)benzene linker (see Figure 2D). Isoreticular expansion of void channels in GY-75 retains the same hydrophobic properties of GY-75 in void channels of GY-76.
- GY-76 has a larger surface area up to 500 m 2 /g compared to GY-75 and GY-76 retains the same hydrophobic environment observed in GY-75. Similar to GY-75, GY-76 also crystallizes in C 2/c space group. The crystal structure of GY-76 was solved using three dimensional (3D) electron diffraction.
- the solid sorbent comprises [ ⁇ Cu 2 (4,4'-[l,l'-Biphenyl]-4,4'- diylbis[pyridine] ) 05 ⁇ (l,4- na phthalenediphosphonate)], named hereafter GY-77, and is a MOF which selectively captures CO 2 in flue gas. Also, GY-77 is obtained after isoreticular expansion of GY-75 with 4,4'-[l,l'-Biphenyl]-4,4'-diylbis[pyridi ne] linker (see Figure 2E). GY-77 has a larger surface area compared to GY-75 and GY-76.
- GY-77 s void channels retain the same hydrophobic environment observed in GY-75 and GY-76.
- GY-76 has larger surface area compared to GY-75 and GY-76. Similar to GY-75 and GY-76, GY-77 also crystallizes in C 2/c space group.
- MOFs having the same coordination environment in the secondary building unit of GY-75, GY-76 and GY-77 and possessing divalent metal ions, such as Zn 2+ , Cd 2+ , Ni 2+ , Co 2+ , Mn 2+ , Be 2+ , Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ or Fe 2+ for example.
- divalent metal ions such as Zn 2+ , Cd 2+ , Ni 2+ , Co 2+ , Mn 2+ , Be 2+ , Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ or Fe 2+ for example.
- MOFs of the present invention are possible such as isoreticularly increasing of the surface area, while keeping the identity of the secondary building units, by increasing the tether length of 4,4’-bipyridine units, such as to 1,4-Bis(4- pyridyl)benzene and 4,4'-[l,l'-Biphenyl]-4,4'-diylbis[pyridine] (see Figures 2D and 2E).
- MOFs of the present invention its use for CO 2 capturing and the method for selectively separating CO 2 from gas mixtures will now be explained in detail on the example of GY-75. Additionally, its exceptional thermally stability over e.g. Calf-20 which increases the range of their applicability will be shown in the following sections.
- MOF ⁇ Cu 2 (4,4’-bipyridine) 0.5 ⁇ (l,4- naphthalenediphosphonate)
- each secondary building unit of GY-75 is connected by 4,4’- bipyridine and fully deprotonated 4,4’-naphthalenediphosphonic organic linkers or building blocks to form the three-dimensional MOF structure with rod shaped void channels.
- each secondary building unit is composed of a central copper(ll)oxide dimer chain.
- each of the Cu 2+ ions in the central copper(ll)oxide dimer chains has an additional copper(ll)oxide side dimer with Cu 2+ ions.
- 4,4’-bipyridine organic linkers or building blocks are coordinately bound to the Cu 2+ ions forming the side copper(ll)oxide dimers, which are bound to the central copper(ll)oxide dimer chain.
- Fully deprotonated 1,4- naphthalenediphosphonic acid organic linkers or building blocks are coordinately bound to each of the Cu 2+ ions via phosphonic acid oxygens.
- phosphonate MOFs Due to the presence of three oxygen atoms and two hydrogen atoms in an organophosphonic acid functional group (R-PO 3 H 2 ), phosphonate MOFs are known to be hydrophilic. Therefore, within phosphonate MOF pores, competition between CO 2 and H 2 O physisorption would be expected to favor H 2 O due to the multiple hydrogen bonding possibilities between phosphonate functional groups and H 2 O molecules.
- pores of GY-75 are composed of hydrophobic phenyl side of fully deprotonated 1,4-naphthalenediphosphonic acid (1,4-naphthalenediphosphonate) building blocks and 4,4’- bipyridine moieties.
- Unsubstituted or substituted hydrophobic phenyl side of 1,4- naphthalenediphosphonate groups of GY-75 are facing inside the pores of GY-75, which increases the hydrophobic nature of the pore sites providing more preferred physisorption environment for CO 2 molecules in GY-75 pore sites. It seems, without being bound by the theory, that this protects the hydrophilic sections of GY-75 from H 2 O access, which limits the hydrogen bonding or van der Waals interactions between H 2 O molecules and GY-75 pores.
- phosphonate-MOFs and non-porous phosphonate metal organic solids are usually synthesized with water of crystallization in the pores. Due to the unique structure of GY-75, presence of no water of crystallization is observed. This is also another indicator of GY-75’s hydrophobicity of its pores.
- GY-75 can, thus, incorporate further hydrophobic gases like methane or hydrogen.
- GY-75 is synthesized under autogenous pressure and acidic hydrothermal reaction conditions in water at 200°C. Therefore, GY-75 is an extremely stable MOF that can survive under autogenous pressure in water at 200°C. Despite its synthesis under hydrothermal reaction conditions, and cooling down in presence of water, after its synthesis, no water molecules are present in the pores of GY-75 based on GY-75’s crystal structure obtained by single crystal X-ray diffraction. Surprisingly, it was found that GY-75 has much higher selectivity for C0 2 capture via physisorbing in the presence of H 2 0 compared to Calf-20. Calf-20 is known to be selective for C0 2 capture below 40% RH, but Calf-20 starts losing its selectivity for CO 2 capture in the presence of H 2 O starting from a RH of around 30% and higher.
- GY-75 can selectively capture much better CO 2 and particularly much better at the presence of H 2 O in a RH of above 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70% and up to 80% RH including any ranges in between, than Calf-20 or any other MOF known.
- GY-75 can also selectively capture CO 2 over H 2 O at RH higher than 80%.
- GY-75 is synthesized at 200°C in water under hydrothermal reaction conditions and under autogenous pressure, as well as acidic pH conditions. Even under harsh conditions like in acids and alkalines GY-75 is stable, at room temperature over 5-10 years. E.g. GY-75 is stable in 0,1 M KOH at pH 13 while it dissociates to form CuO and Cu(OH) 2 species at about 5 M KOH and can be easily disposed.
- GY-75 When in use, GY-75 can be recycled hundreds of times and adsorb and desorb CO 2 as many times as the recycling stages can be performed.
- PSA Pressure Swing Adsorption
- TSA Temperature Swing Adsorption
- VSA Vacuum Swing Adsorption
- TGA Thermo Gravimetric Analysis
- the pores of GY-75 can be activated at350°C for 24 hours in vacuum without losing its crystal structure, which is proven by complementary PXRD (Powder X-Ray Diffraction) experiments.
- the measurements of the structure experiments of the powder of GY-75 show the distribution of the molecules and therefore the pores in the molecule and giving proof that the “binding sites” are free for physisorbing molecules like CO 2 .
- MOF metal-organic chemical vapor deposition
- MOFs include reactants or solvents inside their pores, or they can adsorb water vapor and atmospheric gases while they are exposed to air.
- pores of GY-75 might be partially occupied by unreacted 4,4’-bipyridines, which were needed to remove to activate the MOF for CO 2 adsorption.
- 4,4’-bipyridine has a boiling point of 304.8°C the GY-75 has also a high thermal stability and thus it is possible to activate GY-75 at 350°C and above.
- Activation for gas molecules can be also done at lower pressures and a temperature range between 0°C and 360°C.
- GY-75 retains its crystal structure after 24 hours at 350°C while Calf-20 has been shown to be stable in air only up to 150°C.
- GY-76 and GY-77 are synthesized at temperatures above 220 °C under hydrothermal conditions. They are synthesized free of solvents in their pore channels. Although, they are synthesized under hydrothermal reaction conditions no crystallization of water was observed in their pore channels due to the retained hydrophobicity of the pore channels after isoreticular expansions.
- phosphonate-MOFs are composed of hydrophilic compartments, the skilled practitioner never thought to store CO 2 .
- the unique pore structure of GY-75, GY-76 and GY-77 make it possible that GY-75, GY-76 and GY-77 have higher affinities for CO 2 molecules compared to H 2 O molecules. Due to its high selectivity for CO 2 molecules in the presence of water molecules up to 80% RH, GY-75, GY-76 and GY-77 are advantageous to capture CO 2 both in flue gas, natural gas and/or via direct air capture from the atmosphere or biogas.
- the MOFs according to the invention are thus highly suitable to capture hydrophobic gases.
- GY-75, GY-76 and GY-77 can adsorb and store hydrophobic gases preferably carbon dioxide, methane or hydrogen.
- the invention provides, thus, a method for selectively separating carbon dioxide from a gas mixture with RH from 30%, 40%, 50%, 60%, 70% and up to RH of 80%, and even above 80% RH and towards 100% RH comprising the step of contacting the gas mixture with at least one sorbent as provided herein.
- a gas mixture from which the MOFs of the invention can effectively separate hydrophobic gases are atmospheric gases, greenhouse gases, biogases, natural gas or industrial waste gases which contain, in addition to carbon dioxide and water vapor, at least one gas selected from the group consisting of nitrogen, oxygen, methane, hydrogen, carbon monoxide, hydrogen sulfide, sulfur dioxide, nitrogen dioxide, and any mixture of the foregoing.
- the claimed sorbent is further particularly suitable to selectively absorb CO 2 in a gas mixture having a temperature in the range of -60°C to 360°C, and in particular at a temperature of -60°C, -50°C, -40°C, -30°C, -20°C, -10°C, 0°C, 10°C, 20°C, 30°C, 40°C, 50°C, 60°C, 70°C, 80°C, 90°C, 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, 160°C, 170°C, 180°C, 190°C, 200°C, 210°C, 220°C, 230°C, 240°C, 250°C, 260°C, 270°C, 280°C, 290°C, 300°C, 310°C, 320°C, 330°C, 340°C, 350°C or 360°C.
- the reaction conditions at which CO 2 is released include the step of releasing the CO 2 comprises heating the sorbent (with or without pressure) up to temperatures of 50°C, 60°C, 70°C, 80°C, 90°C, 100°C, 150°C, 200°C, 350°C or even up to 400°C.
- GY-75 has an isosteric enthalpy of adsorption of -36,5 kJ/mol whereas Calf-20 has -39 kJ/mol.
- the moderate value of -36,5 kJ/mol is very suitable for industrial applications of CO 2 capture and release when needed using these methods.
- the released CO 2 is then collected for further use, described as e.g. carbon capture utilization and storage (CCUS).
- CCUS carbon capture utilization and storage
- the method of the invention is particularly useful for separating CO 2 from gas mixture containing at least one additional gas selected from the group consisting of nitrogen, oxygen, methane, hydrogen, carbon monoxide, hydrogen sulfide, sulfur dioxide, nitrogen dioxide, and any mixture of the foregoing.
- gas mixtures are typically found as or defined as natural gas, air, shale gas, biogas and flue gas.
- MOFs according to the invention are synthesized by solvothermal method that means the reaction is in a closed vessel under autogenous pressure above the boiling point of the solvent.
- solvothermal method usually includes a hydrothermal method and an organic solvothermal method.
- the reaction conditions for forming MOFs according to the invention is directed by heating/temperature, molar ratio of initial ion to ligand, pH, solvent, time and pressure. By using these parameters in combination with choosing a suitable and wanted ligand the structure of the formed MOFs such as size, surface, pore size and morphology is controlled.
- solvents for generating MOFs of the invention are most commonly used N,N-dimethylformamide, ethanol, methanol and water.
- MOFs with divalent transition metal ions like Zn 2+ and Cu 2+ and further divalent metal ions as Ca 2+ , Mn 2+ , Mg 2+ , Fe 2+ , Co 2+ , Ni 2+ , Cd 2+ , Ba 2+ are composed with linear or Y-shaped or X-shaped or tetrahedral shaped linkers as polycarboxylate, carboxylates or phosphonates or nitrogen donating linkers to build structure types of high crystallinity with mono-/bi-/tri-/tetra-nuclear oxoclusters and chains.
- 1,4-naphthalenediphosphonic acid (0.100 g, 0.35 mmol), CuSO4*5H2O (0.150 g, 0.60 mmol), 4,4’- bipyridine (0.040 g, 0.256 mmol) and H 2 0 (10.084 g, 560 mmol) reacted for 4 days at 200°C under autogeneous pressure.
- GY-76 and GY-77 are synthesized using 0.256 mmol l,4-Bis(4-pyridyl)benzene and + 4,4'-[l,l'-Biphenyl]-4,4'-diylbis[pyridine] using the same reaction conditions as for GY-75 respectively.
- GY-75, GY-76 and GY-77 can also be synthesized using mechanochemistry, either solvent free or with solvents, and microwave synthesis at large scales.
- MOFs it is summarized of the invention to use mixed divalent metal MOF synthesis and solvent free synthesis.
- divalent metals with nitrogen containing ligands such as triazole, tetrazole, imidazole and pyrazole MOFs are formed that are more chemically robust against hydrolysis.
- Phosphonic acids are known to be stable against hydrolysis, decomposition under UV light and thermal decomposition up to 400°C. When phosphonic acids and arsonic acids are fully deprotonated they have -2 negative charge R-PO 3 2 ' and R-AsO 3 2 ' respectively. Therefore, they can form stronger metal binding resulting in better stability compared to the other organic linker families (carboxylates, sulfonates, azolates, pyridines, imines, quinoids, etc.), which are used in MOF synthesis.
- Copper(ll)salts as CuSO 4 *5H 2 0 and other divalent meta 1(1 l)sa Its such containing Zn 2+ , Mg 2+ , Ba 2+ , Ca 2+ , Co 2+ , Ni 2+ and Cd 2+ can be used.
- M (I I) examples mentioned but not limited exclusively to that are ZnSO 4 *7H 2 O, Zn 3 (PO 4 ) 2 *4H 2 O, Ca 3 (PO 4 ) 2 and divalent metals hereafter as M (I I) in the formula abbreviated like M (I l)(OAc) 2 , M (I I) (NO 3 ) 2 , M (I I) (BF 4 ) 2 , M (I l)Cl 2 and similar metal salts can be used to form MOFs.
- Figure 1A One dimensional (or rod shaped) Secondary building unit (SBU) of [ ⁇ Cu 2 (4,4’- bpy)0.5](l,4-N DPA)] (1,4-NDPA is 1,4-naphthalenediphosphonate) (GY-75) expanding.
- SBU Secondary building unit
- Figure IB The perspective view of rectangular void channels along with the top view of the one-dimensional or rod shaped SBU, where the band gap of the compound is 1.4 eV.
- Figure 1C Side view of the rod shaped SBU consisting of a zigzag chain of corner-sharing copper dimers, with Cu-Cu distances of less than 3 A. Dimers are based on their Cu-Cu bond distances.
- Figure IF shows the crystal structure of GY-76, which is the isoreticular expansion of GY-75 into GY-76 by usingthe longer tethered linker l,4-Bis(4-pyridyl)benzene.
- the structure of GY-76 is obtained from three-dimensional electron diffraction.
- Figure 2A 1,4-naphthalenediphosphonic acid.
- Figure 2B 1,4-naphthalenediphosphonate, fully deprotonated 1,4-naphthalenediphosphonic acid.
- Figure 2C 4,4’-bipyridine.
- surface area of GY-75 can be increased isoreticularly via increasing the tether length of 4,4’-bipyridine units to l,4-Bis(4-pyridyl)benzene and 4,4'-[l,l'-Biphenyl]-4,4'- diylbis[pyridine] (See Figure 2D and 2E respectively).
- Figure 3 confirms in a Monte Carlo simulation that the MOF, GY-75, is highly selective for capturing CO 2 up to 80% RH, while Calf-20 is capturing only up to 40% RH usingthe same parameters.
- Figure 4 shows CO 2 adsorption isotherms of GY-75 at different temperatures. As expected at higher temperatures CO 2 capture capacity is reduced. Data derived from Figure 4 shows the pores of GY-75 have an isosteric enthalpy of adsorption of -36,5 kJ/mol whereas Calf-20 has -39 kJ/mol. The moderate value of -36,5 kJ/mol is very suitable for industrial applications of CO 2 capture and release when needed.
- Figure 5A shows the structure of GY-76 with exemplary atoms labeled.
- Figure 6 shows a Thermo Gravimetric Analysis (TGA) of GY-75 indicating that organic components of GY-75 are stable under oxygen, RH (relative humidity) and temperatures of above 400 °C.
- TGA Thermo Gravimetric Analysis
- Figure 7 shows GY-75 retains its crystal structure after 24 hours at 350°C while its competitor Calf-20 has been shown to be stable in air only up to 150°C.
- Figure 7 shows further powder XRD pattern. According to Figure 7, the structure of GY-75 is not altered after its activation at 350°C. Calf-20 was instable much earlier.
- Figure 8 shows molecule 1,4-naphthalenediarsonate.
Abstract
This invention relates to the provision of metal organic frameworks (MOFs) as solid sorbents to selectively capture gas molecules from the atmosphere or other gases, in particular to capture CO2 and even more specific in the presence of H2O.
Description
Solid Sorbents for capturing C02
This invention relates to the provision of metal organic frameworks (MOFs) as solid sorbents to selectively capture gas molecules from the atmosphere or other gases, in particular to capture CO2 and even more specific in the presence of H2O.
In recent years, carbon capture, utilization and storage (CCUS) processes have been one of the most active research and business areas aiming to reduce worldwide carbon emissions. One of the most important goals in CCUS processes is to develop new stable microporous solid sorbents that can adsorb CO2 in flue gas or industrial CO2 sources and ideally remove CO2 from the atmosphere via direct air capture (DAC). Due to the fact that both atmosphere and flue gas have competing water content, this competition between CO2 and H2O molecules has been a significant challenge for application of physisorbent MOF materials to selectively capture CO2 molecules.
Many porous solids have potential to be used as solid sorbents for CO2 capture, metal organic frameworks (MOFs) being one of them. MOFs generally prefer physisorption of H2O over CO2 molecules. In order to capture CO2 in flue gas or in another gas mixture, a MOF must be able to selectively capture (physisorb) CO2 over H2O.
The requirements for the MOFs that can be used to selectively capture CO2 are high. The desired MOF must be stable in humid conditions, acidic and alkaline conditions and survive at high temperatures. In general, MOFs are known to have weak chemical stabilities and thermal stabilities in the presence of humidity and high temperatures. Thus, they will lose their functionality and selectivity under most conditions which are harsher than e.g. at room temperature or any slightly enhanced temperatures as well as at increased percentages of humidity. A further limitation to the use of MOFs is to contact them with gases which are not dry.
Typically, MOFs are composed of metal binding functional groups, i.e., carboxylic acids, pyridines, azolates, quinoids that are also capable creating relatively stronger hydrogen bonds with H2O molecules. Carboxylate MOFs are the most widely studied MOF family and they are generally known to hydrolyze in the presence of water.
One example of MOFs as potential solid sorbents to selectively capture CO2 molecules in atmosphere and in flue gas, an MOF as sorbent for CO2 in the presence of water is described in EP 2971 277. The MOF described therein is known as Calf-20 which is composed of oxalic acid triazolate functional groups (a carboxylate MOF) with molecular formula [Zn2(l,2,4- triazolate)2(oxalate)].
Calf-20 is known to perform selective physisorption of CO2 molecules in the presence of water. However, beginning at 10% relative humidity (RH) the CO2 loading gradually decreases until it is almost negligible at RH > 30%. Selectivity of Calf-20 for H2O and CO2 becomes equal at 40% RH. Consequently, it is state of the art, MOFs usually use organophosphonate building blocks which were not known to selectively capture CO2 molecules in the presence of H2O even if there are only traces of H2O.
The object of the present invention is to provide solid CO2 sorbents comprising MOFs. This object of the present invention is solved by the provision of MOF as organophosphonates and organoarsonates, and in particular a solid CO2 sorbent comprising a phosphonate MOF with one of the following molecular formulas [{M2(4,4’-bipyridine)0.5}(l,4-naphthalenediphosphonate)], [{M2(4,4’-bipyridine)0.5}(l,4-naphthalenediarsonate)], [{M2(l,4-Bis(4-pyridyl)benzene)05}(l,4- naphthalenediphosphonate)], [{M2(l,4-Bis(4-pyridyl)benzene)05}(l,4-naphthalenediarsonate)], [{M2(4,4Z -[1,1Z -Biphenyl]-4,4Z -diylbis[pyridine] )05}(l,4-naphthalenediphosphonate)] or [{M2(4,4Z -[1,1Z -Biphenyl]-4,4Z -diylbis[pyridine] )05}(l,4-naphthalenediarsonate)], wherein the metal is a divalent kation M2+ e,g. copper(ll), zinc(ll) , cadmium(ll) , ferrum(ll), nickel(ll), cobalt(ll), manganese(ll), berylliu m(l I), magnesium(ll), calcium(ll), strontium(ll) or barium(ll). The units of the secondary building unit (SBU) and the metal organic framework are preferably unsubstituted, but may be also partially and/or totally substituted by halogenides.
Unexpectedly, the MOFs of the present invention were found to selectively capture CO2 under harsh conditions. Such conditions are e.g. the presence of H2O in a gas with 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95 or 100% RH.
It was found further that MOFs of the present invention are stable until 360°C allowing the use of hot gases and or industrial waste gases containing CO2. In the present invention MOFs can operate from -60°C, -50°C, -40°C, -30°C, -20°C, -10°C, 0°C, 10°C, 20°C, 30°C, 40°C, 50°C, 60°C, 70°C, 80°C, 90°C, 100°C, 110°C, 120°, C130°C, 140°C, 150°C, 160°, C 170°C, 180°C, 190°C, 200°C, 210°C,
220°C, 230°C, 240°C, 250°C, 260°C, 270°C, 280°C, 290°C, 300°C, 310°C, 320°C, 330°C, 340°C, 350°C or 360°C or in any range in between these values.
Additionally, also a high content of acidic gases, like SO2, SO3, H2S, H2SO3, H2SO4, HF, HCl, HNO2, HNO3, NO, NO2, NOX in a range from 0 % up to 20 %, alternatively 0.1 - 18%, alternatively 0.5 - 10%, alternatively 0.5 - 15%, alternatively 5 - 15%, alternatively 5 - 10%, alternatively 10 - 15 %, or alternatively 10 - 18%, which would be considered as corrosive or harsh conditions, will be still suitable conditions for the MOFs of the invention and do not destroy the bonds of the compound.
In one embodiment of the invention the solid sorbent comprises [{Cu2(4,4’-bipyridine)0.5}(l,4- naphthalenediphosphonate)], named hereafter GY-75, is a MOF which selectively captures CO2 in flue gas. It was found that [{Cu2(4,4’-bipyridine)0.5}(l,4-naphthalenediphosphonate)] (GY-75) has particularly in presence of H2O much higher preference for CO2 capturing molecules compared to any MOF known in the state of the art . Additionally, it has got even the highest affinity expectation in CO2 capturing for industry compared to the standards in literature.
In another embodiment the solid sorbent comprises [{Cu2(l,4-Bis(4-pyridyl)benzene)0.5}(l,4- naphthalenediphosphonate)], named hereafter GY-76, and is a MOF which selectively captures CO2 in flue gas (see Figure IF). GY-76 is obtained after isoreticular expansion of GY-75 with 1,4- Bis(4-pyridyl)benzene linker (see Figure 2D). Isoreticular expansion of void channels in GY-75 retains the same hydrophobic properties of GY-75 in void channels of GY-76. GY-76 has a larger surface area up to 500 m2/g compared to GY-75 and GY-76 retains the same hydrophobic environment observed in GY-75. Similar to GY-75, GY-76 also crystallizes in C 2/c space group. The crystal structure of GY-76 was solved using three dimensional (3D) electron diffraction.
In another embodiment the solid sorbent comprises [{Cu2(4,4'-[l,l'-Biphenyl]-4,4'- diylbis[pyridine] )05}(l,4-naphthalenediphosphonate)], named hereafter GY-77, and is a MOF which selectively captures CO2 in flue gas. Also, GY-77 is obtained after isoreticular expansion of GY-75 with 4,4'-[l,l'-Biphenyl]-4,4'-diylbis[pyridi ne] linker (see Figure 2E). GY-77 has a larger surface area compared to GY-75 and GY-76. GY-77’s void channels retain the same hydrophobic environment observed in GY-75 and GY-76. GY-76 has larger surface area compared to GY-75 and GY-76. Similar to GY-75 and GY-76, GY-77 also crystallizes in C 2/c space group.
Further compounds that can be used as MOFs in the solid CO2 sorbent of the present invention are MOFs having the same coordination environment in the secondary building unit of GY-75, GY-76 and GY-77 and possessing divalent metal ions, such as Zn2+, Cd2+, Ni2+, Co2+, Mn2+, Be2+, Mg2+, Ca2+, Sr2+, Ba2+ or Fe2+ for example.
Furthermore, different modifications for MOFs of the present invention are possible such as isoreticularly increasing of the surface area, while keeping the identity of the secondary building units, by increasing the tether length of 4,4’-bipyridine units, such as to 1,4-Bis(4- pyridyl)benzene and 4,4'-[l,l'-Biphenyl]-4,4'-diylbis[pyridine] (see Figures 2D and 2E).
Isostructural [{Cu2(4,4’-bipyridine)0.5}(l,4-naphthalenediarsonate)] (GY-75-As), [{M2(l,4-Bis(4- pyridyl)benzene)05}(l,4-naphthalenediarsonate)] (GY-76-As), [{M2(4,4'-[l,l'-Biphenyl]-4,4'- diylbis[pyridine] )05}(l,4-naphthalenediarsonate)] (GY-77-As) have similar properties as GY-75, GY-76 and GY-77 (Figure 8) and they can be synthesized under the same conditions respectively.
MOFs of the present invention, its use for CO2 capturing and the method for selectively separating CO2 from gas mixtures will now be explained in detail on the example of GY-75. Additionally, its exceptional thermally stability over e.g. Calf-20 which increases the range of their applicability will be shown in the following sections.
The structure and the hydrothermal synthesis of MOF [{Cu2(4,4’-bipyridine)0.5}(l,4- naphthalenediphosphonate)] for its use in semiconductors was previously published in K. Siemensmeyer et al., “Phosphonate Metal-Organic Frameworks: A Novel Family of Semiconductors. Adv Mater 32, e2000474 (2020). In this publication susceptibility of the MOFs is described but there is no hint of their ability of capturing CO2.
Up to now 300,000 MOFs are screened in databases e.g. MOFXDB API Databases as a MOF for capturing CO2, GY-75 has not been identified, without being bound by this hypothesis, probably due to its hydrophilic sections forms hydrogen bonding and has thus a higher melting point. Alternatively, it may also be that the covalently bonded atoms e.g. in the GY-75 and even more stability than hydrogen bonded atoms and thus show these unexpected characteristics and advantages due to its overwhelmingly deviations of the normal MOF behavior.
As seen in Figure lA and IB, the secondary building units of GY-75 are connected by 4,4’- bipyridine and fully deprotonated 4,4’-naphthalenediphosphonic organic linkers or building blocks to form the three-dimensional MOF structure with rod shaped void channels.
In more detail, each secondary building unit is composed of a central copper(ll)oxide dimer chain. As seen in Figure IB, each of the Cu2+ ions in the central copper(ll)oxide dimer chains has an additional copper(ll)oxide side dimer with Cu2+ ions. 4,4’-bipyridine organic linkers or building blocks are coordinately bound to the Cu2+ ions forming the side copper(ll)oxide dimers, which are bound to the central copper(ll)oxide dimer chain. Fully deprotonated 1,4- naphthalenediphosphonic acid organic linkers or building blocks are coordinately bound to each of the Cu2+ions via phosphonic acid oxygens.
Due to the presence of three oxygen atoms and two hydrogen atoms in an organophosphonic acid functional group (R-PO3H2), phosphonate MOFs are known to be hydrophilic. Therefore, within phosphonate MOF pores, competition between CO2 and H2O physisorption would be expected to favor H2O due to the multiple hydrogen bonding possibilities between phosphonate functional groups and H2O molecules.
Surprisingly, pores of GY-75 are composed of hydrophobic phenyl side of fully deprotonated 1,4-naphthalenediphosphonic acid (1,4-naphthalenediphosphonate) building blocks and 4,4’- bipyridine moieties. Unsubstituted or substituted hydrophobic phenyl side of 1,4- naphthalenediphosphonate groups of GY-75 are facing inside the pores of GY-75, which increases the hydrophobic nature of the pore sites providing more preferred physisorption environment for CO2 molecules in GY-75 pore sites. It seems, without being bound by the theory, that this protects the hydrophilic sections of GY-75 from H2O access, which limits the hydrogen bonding or van der Waals interactions between H2O molecules and GY-75 pores.
Due to the hydrophilic nature of phosphonates, phosphonate-MOFs and non-porous phosphonate metal organic solids are usually synthesized with water of crystallization in the pores. Due to the unique structure of GY-75, presence of no water of crystallization is observed. This is also another indicator of GY-75’s hydrophobicity of its pores.
GY-75 can, thus, incorporate further hydrophobic gases like methane or hydrogen.
GY-75 is synthesized under autogenous pressure and acidic hydrothermal reaction conditions in water at 200°C. Therefore, GY-75 is an extremely stable MOF that can survive under autogenous pressure in water at 200°C. Despite its synthesis under hydrothermal reaction conditions, and cooling down in presence of water, after its synthesis, no water molecules are present in the pores of GY-75 based on GY-75’s crystal structure obtained by single crystal X-ray diffraction.
Surprisingly, it was found that GY-75 has much higher selectivity for C02 capture via physisorbing in the presence of H20 compared to Calf-20. Calf-20 is known to be selective for C02 capture below 40% RH, but Calf-20 starts losing its selectivity for CO2 capture in the presence of H2O starting from a RH of around 30% and higher.
At 10% RH Calf-20 starts adsorbing H2O, while GY-75 starts adsorbing H2O at 80% RH still has a selectivity for adsorbing CO2. At RH of around 40 % Calf-20’s selectivity of adsorbing H2O vapor and CO2 gas becomes equal. Above 40% relative humidity Calf-20 is more selective for H2O vapor.
Interestingly, the inventor found as shown in Figure 3 that GY-75 can selectively capture much better CO2and particularly much better at the presence of H2O in a RH of above 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70% and up to 80% RH including any ranges in between, than Calf-20 or any other MOF known.
In particular, GY-75 can also selectively capture CO2over H2O at RH higher than 80%.
One of the advantages of GY-75 compared to the current state of the art is its exceptional chemical and thermal stability. GY-75 is synthesized at 200°C in water under hydrothermal reaction conditions and under autogenous pressure, as well as acidic pH conditions. Even under harsh conditions like in acids and alkalines GY-75 is stable, at room temperature over 5-10 years. E.g. GY-75 is stable in 0,1 M KOH at pH 13 while it dissociates to form CuO and Cu(OH)2 species at about 5 M KOH and can be easily disposed.
When in use, GY-75 can be recycled hundreds of times and adsorb and desorb CO2 as many times as the recycling stages can be performed.
The pressure for recycling and releasing CO2 is lowered, a technique that is known and used as Pressure Swing Adsorption (PSA). Same result is achieved by lowering or increasing the temperature known as Temperature Swing Adsorption (TSA). Using Vacuum Swing Adsorption (VSA) is possible to recycle the MOF and release CO2, too.
As seen in Figure 6, Thermo Gravimetric Analysis (TGA) of GY-75 indicates that organic components of GY-75 are stable till 400°C.
Furthermore, the pores of GY-75 can be activated at350°C for 24 hours in vacuum without losing its crystal structure, which is proven by complementary PXRD (Powder X-Ray Diffraction) experiments. The measurements of the structure experiments of the powder of GY-75 show the distribution of the
molecules and therefore the pores in the molecule and giving proof that the “binding sites” are free for physisorbing molecules like CO2.
The activation of MOF is performed to open and unblock pores so that maximum amount of CO2 can be adsorbed. After their synthesis most MOFs include reactants or solvents inside their pores, or they can adsorb water vapor and atmospheric gases while they are exposed to air. For example, pores of GY-75 might be partially occupied by unreacted 4,4’-bipyridines, which were needed to remove to activate the MOF for CO2 adsorption. As 4,4’-bipyridine has a boiling point of 304.8°C the GY-75 has also a high thermal stability and thus it is possible to activate GY-75 at 350°C and above. Activation for gas molecules can be also done at lower pressures and a temperature range between 0°C and 360°C.
As seen in Figure 7, GY-75 retains its crystal structure after 24 hours at 350°C while Calf-20 has been shown to be stable in air only up to 150°C.
Furthermore, it has been proven that the crystal structure of GY-75, GY-76 and GY-77 can and will stay intact for many years at room temperature and the correlating relative humidity.
GY-76 and GY-77 are synthesized at temperatures above 220 °C under hydrothermal conditions. They are synthesized free of solvents in their pore channels. Although, they are synthesized under hydrothermal reaction conditions no crystallization of water was observed in their pore channels due to the retained hydrophobicity of the pore channels after isoreticular expansions.
Although phosphonate-MOFs are composed of hydrophilic compartments, the skilled practitioner never thought to store CO2. Surprisingly, it was found that the unique pore structure of GY-75, GY-76 and GY-77 make it possible that GY-75, GY-76 and GY-77 have higher affinities for CO2 molecules compared to H2O molecules. Due to its high selectivity for CO2 molecules in the presence of water molecules up to 80% RH, GY-75, GY-76 and GY-77 are advantageous to capture CO2 both in flue gas, natural gas and/or via direct air capture from the atmosphere or biogas.
The MOFs according to the invention are thus highly suitable to capture hydrophobic gases. For example, GY-75, GY-76 and GY-77 can adsorb and store hydrophobic gases preferably carbon dioxide, methane or hydrogen.
In one embodiment the invention provides, thus, a method for selectively separating carbon dioxide from a gas mixture with RH from 30%, 40%, 50%, 60%, 70% and up to RH of 80%, and even above 80% RH and towards 100% RH comprising the step of contacting the gas mixture with at least one sorbent as provided herein.
Typically, a gas mixture from which the MOFs of the invention can effectively separate hydrophobic gases are atmospheric gases, greenhouse gases, biogases, natural gas or industrial waste gases which contain, in addition to carbon dioxide and water vapor, at least one gas selected from the group consisting of nitrogen, oxygen, methane, hydrogen, carbon monoxide, hydrogen sulfide, sulfur dioxide, nitrogen dioxide, and any mixture of the foregoing.
The claimed sorbent is further particularly suitable to selectively absorb CO2 in a gas mixture having a temperature in the range of -60°C to 360°C, and in particular at a temperature of -60°C, -50°C, -40°C, -30°C, -20°C, -10°C, 0°C, 10°C, 20°C, 30°C, 40°C, 50°C, 60°C, 70°C, 80°C, 90°C, 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, 160°C, 170°C, 180°C, 190°C, 200°C, 210°C, 220°C, 230°C, 240°C, 250°C, 260°C, 270°C, 280°C, 290°C, 300°C, 310°C, 320°C, 330°C, 340°C, 350°C or 360°C.
According to the method the reaction conditions at which CO2 is released include the step of releasing the CO2 comprises heating the sorbent (with or without pressure) up to temperatures of 50°C, 60°C, 70°C, 80°C, 90°C, 100°C, 150°C, 200°C, 350°C or even up to 400°C.
Pressure Swing Adsorption, Temperature Swing Adsorption and Vacuum SwingTechnologies are used for CO2 gases, GY-75 has an isosteric enthalpy of adsorption of -36,5 kJ/mol whereas Calf-20 has -39 kJ/mol. The moderate value of -36,5 kJ/mol is very suitable for industrial applications of CO2 capture and release when needed using these methods.
According to one further embodiment the released CO2 is then collected for further use, described as e.g. carbon capture utilization and storage (CCUS).
Additionally, the method of the invention is particularly useful for separating CO2 from gas mixture containing at least one additional gas selected from the group consisting of nitrogen, oxygen, methane, hydrogen, carbon monoxide, hydrogen sulfide, sulfur dioxide, nitrogen dioxide, and any mixture of the foregoing. Such gas mixtures are typically found as or defined as natural gas, air, shale gas, biogas and flue gas.
MOFs according to the invention are synthesized by solvothermal method that means the reaction is in a closed vessel under autogenous pressure above the boiling point of the solvent. Such solvothermal method usually includes a hydrothermal method and an organic solvothermal method.
The reaction conditions for forming MOFs according to the invention is directed by heating/temperature, molar ratio of initial ion to ligand, pH, solvent, time and pressure. By using these parameters in combination with choosing a suitable and wanted ligand the structure of the formed MOFs such as size, surface, pore size and morphology is controlled.
As solvents for generating MOFs of the invention are most commonly used N,N-dimethylformamide, ethanol, methanol and water.
MOFs with divalent transition metal ions like Zn2+and Cu2+ and further divalent metal ions as Ca2+, Mn2+, Mg2+, Fe2+, Co2+, Ni2+, Cd2+, Ba2+ are composed with linear or Y-shaped or X-shaped or tetrahedral shaped linkers as polycarboxylate, carboxylates or phosphonates or nitrogen donating linkers to build structure types of high crystallinity with mono-/bi-/tri-/tetra-nuclear oxoclusters and chains.
Reaction conditions for GY-75 are starting with
Reaction conditions for GY-77 are starting with
1,4-naphthalenediphosphonic acid + CuSO4*5H2O + 4,4'-[l,l'-Biphenyl]-4,4'-
diylbis[pyridine] + H2O GY-77 above 220 °C, 4d, Ap
For the hydrothermal reactions Teflon lined Parr Acid Digestion Vessels were used starting at a pH of 2.
1,4-naphthalenediphosphonic acid (0.100 g, 0.35 mmol), CuSO4*5H2O (0.150 g, 0.60 mmol), 4,4’-
bipyridine (0.040 g, 0.256 mmol) and H20 (10.084 g, 560 mmol) reacted for 4 days at 200°C under autogeneous pressure. GY-76 and GY-77 are synthesized using 0.256 mmol l,4-Bis(4-pyridyl)benzene and + 4,4'-[l,l'-Biphenyl]-4,4'-diylbis[pyridine] using the same reaction conditions as for GY-75 respectively. Needle-shaped green crystals were received and purified in acetone and air-dried. GY-75, GY-76 and GY-77 can also be synthesized using mechanochemistry, either solvent free or with solvents, and microwave synthesis at large scales.
For further MOFs it is summarized of the invention to use mixed divalent metal MOF synthesis and solvent free synthesis. When using divalent metals with nitrogen containing ligands such as triazole, tetrazole, imidazole and pyrazole MOFs are formed that are more chemically robust against hydrolysis.
Phosphonic acids are known to be stable against hydrolysis, decomposition under UV light and thermal decomposition up to 400°C. When phosphonic acids and arsonic acids are fully deprotonated they have -2 negative charge R-PO3 2' and R-AsO3 2' respectively. Therefore, they can form stronger metal binding resulting in better stability compared to the other organic linker families (carboxylates, sulfonates, azolates, pyridines, imines, quinoids, etc.), which are used in MOF synthesis.
Copper(ll)salts as CuSO4*5H20 and other divalent meta 1(1 l)sa Its such containing Zn2+, Mg2+, Ba2+, Ca2+, Co2+, Ni2+ and Cd2+ can be used. Examples mentioned but not limited exclusively to that are ZnSO4*7H2O, Zn3(PO4)2*4H2O, Ca3(PO4)2 and divalent metals hereafter as M (I I) in the formula abbreviated like M (I l)(OAc)2, M (I I) (NO3)2, M (I I) (BF4)2, M (I l)Cl2 and similar metal salts can be used to form MOFs.
Figure description:
Figure 1A: One dimensional (or rod shaped) Secondary building unit (SBU) of [{Cu2(4,4’- bpy)0.5](l,4-N DPA)] (1,4-NDPA is 1,4-naphthalenediphosphonate) (GY-75) expanding.
Figure IB: The perspective view of rectangular void channels along with the top view of the one-dimensional or rod shaped SBU, where the band gap of the compound is 1.4 eV.
Figure 1C: Side view of the rod shaped SBU consisting of a zigzag chain of corner-sharing copper dimers, with Cu-Cu distances of less than 3 A. Dimers are based on their Cu-Cu bond distances.
As it can be seen in Figure ID, according to the density functional theory (DFT) CO2 molecules are situated more in the center of GY-75 pore channels with CO2 binding energy of -36.8 kJ/mol.
As seen in Figure IE, H20 molecules are more oriented towards hydrophilic secondary building units but side phenyl groups of the 1,4-napthalenediphoshonate is blocking its complete orientation towards hydrophilic compartments. Therefore, water molecules in GY-75 pores cannot generate stronger non- covalent interactions, such as hydrogen bonds with the hydrophilic compartments of GY-75.
Figure IF shows the crystal structure of GY-76, which is the isoreticular expansion of GY-75 into GY-76 by usingthe longer tethered linker l,4-Bis(4-pyridyl)benzene. The structure of GY-76 is obtained from three-dimensional electron diffraction.
Figure 2A: 1,4-naphthalenediphosphonic acid. Figure 2B: 1,4-naphthalenediphosphonate, fully deprotonated 1,4-naphthalenediphosphonic acid. Figure 2C: 4,4’-bipyridine.
Furthermore, surface area of GY-75 can be increased isoreticularly via increasing the tether length of 4,4’-bipyridine units to l,4-Bis(4-pyridyl)benzene and 4,4'-[l,l'-Biphenyl]-4,4'- diylbis[pyridine] (See Figure 2D and 2E respectively).
Figure 3 confirms in a Monte Carlo simulation that the MOF, GY-75, is highly selective for capturing CO2 up to 80% RH, while Calf-20 is capturing only up to 40% RH usingthe same parameters.
Figure 4 shows CO2 adsorption isotherms of GY-75 at different temperatures. As expected at higher temperatures CO2 capture capacity is reduced. Data derived from Figure 4 shows the pores of GY-75 have an isosteric enthalpy of adsorption of -36,5 kJ/mol whereas Calf-20 has -39 kJ/mol. The moderate value of -36,5 kJ/mol is very suitable for industrial applications of CO2 capture and release when needed.
Experimental results of heat adsorption led to similar results within the expected error margin. GY-75 has high affinity for CO2, on the other hand, CO2 affinity of GY-75 is low enough to release CO2 molecule when needed for carbon separation, recycling and/or storage processes.
Further data confirm that GY-75 has an -28,1 kJ/mol isosteric enthalpy of adsorption for H2O molecules, which indicates that GY-75 has less affinity for H2O molecules compared to the CO2 molecules.
Figure 5A shows the structure of GY-76 with exemplary atoms labeled.
Figure 5B summarizes the isoreticular expansions of GY-75 into GY-76, GY-77 and longer tethered versions of 4,4’-bipyridine, where n= 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.
Figure 6, shows a Thermo Gravimetric Analysis (TGA) of GY-75 indicating that organic components of GY-75 are stable under oxygen, RH (relative humidity) and temperatures of above 400 °C.
Figure 7 shows GY-75 retains its crystal structure after 24 hours at 350°C while its competitor Calf-20 has been shown to be stable in air only up to 150°C. Figure 7 shows further powder XRD pattern. According to Figure 7, the structure of GY-75 is not altered after its activation at 350°C. Calf-20 was instable much earlier. Figure 8 shows molecule 1,4-naphthalenediarsonate.
Claims
1. A solid sorbent for selectively capturing hydrophobic gases such as CO2, CH4 or H2 from a gas composition with up to 100% RH (relative humidity) wherein the solid sorbent comprises at least one or more secondary building units (SBU) or inorganic building units and is a phosphonate metal-organic framework (MOF) for gas capture and storage, comprising at least one compound selected from the group of general formulas [{M2(4,4’-bipyridine)0.5}(l,4-naphthalenediphosphonate)], [{M2(4,4’-bipyridine)0.s}(l,4- naphthalenediarsonate)], [{M2(l,4-Bis(4-pyridyl)benzene)05}(l,4- naphthalenediphosphonate)], [{M2(l,4-Bis(4-pyridyl)benzene)05}(l,4- naphthalenediarsonate)], [{M2(4,4'-[l,l'-Biphenyl]-4,4'-diylbis[pyridine] )0.s}(l,4- naphthalenediphosphonate)] and [{M2(4,4'-[1,1'-Bi p heny l]-4,4'-d iylbis[pyridine] )0.s}(l,4- naphthalenediarsonate)], wherein M is selected from the group of divalent metal ions comprising one of the following Cu (I I), Zn(ll), Cd(ll), Ni(ll), Co(ll), Fe(ll), Mn(ll), Be(ll), Mg(ll), Ca(ll), Sr(ll) and Ba(ll).
2. Asolid sorbent comprising MOF accordingto claim 1 wherein at least one of the organic linkers of the MOF are partially and/or totally substituted by halogenides.
3. Asolid sorbent comprising MOF accordingto claim 1 or 2 wherein the unsubstituted and/or partially or totally substituted phenyl ring of fully deprotonated 1,4- naphthalenediphosphonic acid is facing inside the pores of the MOF.
4. Asolid sorbent comprising MOF accordingto any of the previous claims 1 to 3 wherein the MOF is [{Cu2(4,4’-bipyridine)0.5}(l,4-naphthalenediphosphonate)], [{Cu2(4,4’- bipyridine)05}(l,4-naphthalenediarsonate)], [{Cu2(l,4-Bis(4-pyridyl)benzene)0.5}(l,4- naphthalenediphosphonate)], [{Cu2(l,4-Bis(4-pyridyl)benzene)05}(l,4- naphthalenediarsonate)], [{Cu2(4,4'-[l,l'-Biphenyl]-4,4'-diylbis[pyridine] )0.s}(l,4- naphthalenediphosphonate)] or [{Cu2(4,4'-[1,1'-Bi p heny l]-4,4'-d iylbis[pyridine] )0.s}(l,4- naphthalenediarsonate)].
5. Use of a sorbent accordingto any of the claims 1 to 4 to selectively absorb CO2 in a gas mixture.
6. The use of the sorbent of claim 5 to selectively absorb C02 in a gas mixture with a relative humidity (RH) in a range of 0% up to 100%.
7. The use of the sorbent of claims 5 or 6 to selectively absorb CO2 in a gas mixture having a temperature in the range of -60°C to 360°C.
8. The use of sorbent of any of the claims 5 to 7, wherein the gas mixture is atmospheric gases, greenhouse gases, biogases and contains, in addition to carbon dioxide and water vapor, at least one gas selected from the group consisting of nitrogen, oxygen, methane, hydrogen, carbon monoxide, hydrogen sulfide, sulfur dioxide, nitrogen dioxide, and any mixture of the foregoing.
9. The use of sorbent of claim 5 to 8, wherein the gas mixture contains 0 % up to 20 % acidic gases selected from the group comprising SO2, SO3, H2S, H2SO3, H2SO4, HF, HCI, HNO2, HNO3, NO, NO2, NOx and mixtures thereof.
10. A method for selectively separating carbon dioxide from a gas mixture with up to 100% RH comprising the steps of
- contacting the gas mixture with at least one sorbent according to claim 1-4
- isolating the captured CO2 from the sorbent and
- optionally, collecting the isolated CO2.
11. The method of claim 10, wherein the gas mixture gas mixture is atmospheric gas greenhouse gas, biogas, flue gas, shale gas or natural gas and contains, in addition to carbon dioxide and water vapor, at least one gas selected from the group consisting of nitrogen, oxygen, methane, hydrogen, carbon monoxide, hydrogen sulfide, sulfur dioxide, nitrogen dioxide, and any mixture of the foregoing.
12. A method for preparation of a solid gas sorbent of claim 1-4 preparing a compound of the general formula [{M2(4,4’-bipyridine)0.5}(l,4-naphthalenediphosphonate)], [{M2(4,4’- bipyridine)05}(l,4-naphthalenediarsonate)], [{M2(l,4-Bis(4-pyridyl)benzene)05}(l,4- naphthalenediphosphonate)], [{M2(l,4-Bis(4-pyridyl)benzene)05}(l,4- naphthalenediarsonate)], [{M2(4,4'-[l,l'-Biphenyl]-4,4'-diylbis[pyridine] )05}(l,4- naphthalenediphosphonate)] or [{M2(4,4'-[l,l'-Biphenyl]-4,4'-diylbis[pyridine] )05}(l,4- naphthalenediarsonate)]wherein M is one of the following metals: Cu(ll), Zn(ll), Cd (I I), Ni(ll), Co(ll), Fe(ll), Mn(ll), Be(ll), Mg(ll), Ca(ll), Sr(ll), Ba(ll) and is brought to reaction with
isoreticu larly building units by mechanosynthesis, microwave assisted synthesis and/or solvothermal synthesis. The method for preparation of a solid CO2 sorbent according to claim 12 preparing a compound of the general formula [{Cu2(4,4’-bi pyridine)o.5}(l,4- naphthalenediphosphonate)], [{Cu2(4,4’-bipyridine)0.5}(l,4-naphthalenediarsonate)],
[{Cu2(l,4-Bis(4-pyridyl)benzene)05}(l,4-naphthalenediphosphonate)], [{Cu2(l,4-Bis(4- pyridyl)benzene)05}(l,4-naphthalenediarsonate)], [{Cu2(4,4'-[l,l'-Biphenyl]-4,4'- d iylbis[py ridine] )05}(l,4-naphthalenediphosphonate)] or [{Cu2(4,4'-[l,l'-Biphenyl]-4,4'- diylbis[pyridine] )05}(l,4-naphthalenediarsonate)] and bringing the compound to reaction with unsubstituted or substituted isureticularly building units by mechanosynthesis, microwave assisted synthesis and/or solvothermal synthesis.
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EP2971277A1 (en) | 2013-03-11 | 2016-01-20 | UTI Limited Partnership | Metal organic framework, production and use thereof |
WO2021037428A1 (en) * | 2019-08-23 | 2021-03-04 | Technische Universität Berlin | Supercapacitors comprising phosphonate and arsonate metal organic frameworks (mofs) as active electrode materials |
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EP2971277A1 (en) | 2013-03-11 | 2016-01-20 | UTI Limited Partnership | Metal organic framework, production and use thereof |
WO2021037428A1 (en) * | 2019-08-23 | 2021-03-04 | Technische Universität Berlin | Supercapacitors comprising phosphonate and arsonate metal organic frameworks (mofs) as active electrode materials |
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BULUT AYSUN ET AL: "Short Naphthalene Organophosphonate Linkers to Microporous Frameworks", CHEMISTRYSELECT, vol. 2, no. 24, 22 August 2017 (2017-08-22), DE, pages 7050 - 7053, XP093079808, ISSN: 2365-6549, Retrieved from the Internet <URL:https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fslct.201701411> DOI: 10.1002/slct.201701411 * |
BULUT AYSUN ET AL: "Supporting Information to Short Naphthalene Organophosphonate Linkers to Microporous Frameworks", CHEMISTRYSELECT, 22 August 2017 (2017-08-22), DE, pages 1 - 16, XP093079823, ISSN: 2365-6549, Retrieved from the Internet <URL:https://chemistry-europe.onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1002/slct.201701411&file=slct201701411-sup-0001-misc_information.pdf> DOI: 10.1002/slct.201701411 * |
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