WO2023068100A1 - Co2固定化材及びco2固定化物の製造方法 - Google Patents
Co2固定化材及びco2固定化物の製造方法 Download PDFInfo
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- WO2023068100A1 WO2023068100A1 PCT/JP2022/037817 JP2022037817W WO2023068100A1 WO 2023068100 A1 WO2023068100 A1 WO 2023068100A1 JP 2022037817 W JP2022037817 W JP 2022037817W WO 2023068100 A1 WO2023068100 A1 WO 2023068100A1
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- Prior art keywords
- sio
- fixation
- cao
- carbonation
- immobilization
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- 239000000463 material Substances 0.000 title claims abstract description 112
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 150000001875 compounds Chemical class 0.000 claims abstract description 31
- YKAIJSHGJPXTDY-CBDGTLMLSA-N α-cao Chemical compound C([C@@H](N(CC1)C)C23C=CC4([C@H](C3)N(CCCl)CCCl)OC)C3=CC=C(O)C5=C3[C@@]21[C@H]4O5 YKAIJSHGJPXTDY-CBDGTLMLSA-N 0.000 claims abstract description 10
- FGZBFIYFJUAETR-UHFFFAOYSA-N calcium;magnesium;silicate Chemical compound [Mg+2].[Ca+2].[O-][Si]([O-])([O-])[O-] FGZBFIYFJUAETR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 54
- 150000002016 disaccharides Chemical class 0.000 claims description 17
- 230000003100 immobilizing effect Effects 0.000 claims description 15
- HDTRYLNUVZCQOY-UHFFFAOYSA-N α-D-glucopyranosyl-α-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OC1C(O)C(O)C(O)C(CO)O1 HDTRYLNUVZCQOY-UHFFFAOYSA-N 0.000 claims description 9
- HDTRYLNUVZCQOY-WSWWMNSNSA-N Trehalose Natural products O[C@@H]1[C@@H](O)[C@@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 HDTRYLNUVZCQOY-WSWWMNSNSA-N 0.000 claims description 9
- HDTRYLNUVZCQOY-LIZSDCNHSA-N alpha,alpha-trehalose Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 HDTRYLNUVZCQOY-LIZSDCNHSA-N 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 24
- 239000000377 silicon dioxide Substances 0.000 abstract description 12
- -1 3CaO•2SiO2 Chemical compound 0.000 abstract description 5
- 238000003763 carbonization Methods 0.000 abstract description 2
- 229910052681 coesite Inorganic materials 0.000 abstract 2
- 229910052906 cristobalite Inorganic materials 0.000 abstract 2
- 229910052682 stishovite Inorganic materials 0.000 abstract 2
- 229910052905 tridymite Inorganic materials 0.000 abstract 2
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 45
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 27
- 239000000292 calcium oxide Substances 0.000 description 27
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 27
- 239000003153 chemical reaction reagent Substances 0.000 description 24
- 229910002092 carbon dioxide Inorganic materials 0.000 description 22
- 229910018068 Li 2 O Inorganic materials 0.000 description 20
- 230000000694 effects Effects 0.000 description 17
- 239000002994 raw material Substances 0.000 description 16
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 15
- 239000001569 carbon dioxide Substances 0.000 description 15
- 239000006227 byproduct Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 14
- 229910000019 calcium carbonate Inorganic materials 0.000 description 13
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 13
- 239000000920 calcium hydroxide Substances 0.000 description 13
- 235000011116 calcium hydroxide Nutrition 0.000 description 13
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 13
- 239000004567 concrete Substances 0.000 description 12
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- 238000006243 chemical reaction Methods 0.000 description 11
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- 239000002245 particle Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 230000001737 promoting effect Effects 0.000 description 9
- 235000012239 silicon dioxide Nutrition 0.000 description 9
- 238000006467 substitution reaction Methods 0.000 description 9
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 8
- 229910052808 lithium carbonate Inorganic materials 0.000 description 8
- 239000000395 magnesium oxide Substances 0.000 description 8
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 7
- 239000002893 slag Substances 0.000 description 7
- 239000011575 calcium Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
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- 238000001035 drying Methods 0.000 description 4
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- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
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- 229910052760 oxygen Inorganic materials 0.000 description 3
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- 239000010456 wollastonite Substances 0.000 description 3
- 229910052882 wollastonite Inorganic materials 0.000 description 3
- OWEGMIWEEQEYGQ-UHFFFAOYSA-N 100676-05-9 Natural products OC1C(O)C(O)C(CO)OC1OCC1C(O)C(O)C(O)C(OC2C(OC(O)C(O)C2O)CO)O1 OWEGMIWEEQEYGQ-UHFFFAOYSA-N 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- GUBGYTABKSRVRQ-PICCSMPSSA-N Maltose Natural products O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@@H](CO)OC(O)[C@H](O)[C@H]1O GUBGYTABKSRVRQ-PICCSMPSSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- GUBGYTABKSRVRQ-QUYVBRFLSA-N beta-maltose Chemical compound OC[C@H]1O[C@H](O[C@H]2[C@H](O)[C@@H](O)[C@H](O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@@H]1O GUBGYTABKSRVRQ-QUYVBRFLSA-N 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000000834 fixative Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000000634 powder X-ray diffraction Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 239000010801 sewage sludge Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
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- 239000011593 sulfur Substances 0.000 description 2
- 150000003464 sulfur compounds Chemical class 0.000 description 2
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 238000003991 Rietveld refinement Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000000404 calcium aluminium silicate Substances 0.000 description 1
- 235000012215 calcium aluminium silicate Nutrition 0.000 description 1
- WNCYAPRTYDMSFP-UHFFFAOYSA-N calcium aluminosilicate Chemical compound [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O WNCYAPRTYDMSFP-UHFFFAOYSA-N 0.000 description 1
- 229940078583 calcium aluminosilicate Drugs 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- JLDKGEDPBONMDR-UHFFFAOYSA-N calcium;dioxido(oxo)silane;hydrate Chemical compound O.[Ca+2].[O-][Si]([O-])=O JLDKGEDPBONMDR-UHFFFAOYSA-N 0.000 description 1
- WETINTNJFLGREW-UHFFFAOYSA-N calcium;iron;tetrahydrate Chemical compound O.O.O.O.[Ca].[Fe].[Fe] WETINTNJFLGREW-UHFFFAOYSA-N 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007416 differential thermogravimetric analysis Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 238000004993 emission spectroscopy Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 238000007561 laser diffraction method Methods 0.000 description 1
- 229910052907 leucite Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000009938 salting Methods 0.000 description 1
- 238000000790 scattering method Methods 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 125000000185 sucrose group Chemical group 0.000 description 1
- 239000002352 surface water Substances 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
- VLCLHFYFMCKBRP-UHFFFAOYSA-N tricalcium;diborate Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]B([O-])[O-].[O-]B([O-])[O-] VLCLHFYFMCKBRP-UHFFFAOYSA-N 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
- 238000004876 x-ray fluorescence Methods 0.000 description 1
Classifications
-
- 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
- B01D53/14—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 absorption
-
- 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
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/50—Carbon dioxide
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/24—Alkaline-earth metal silicates
Definitions
- the present invention relates to a CO 2 immobilization material and a method for producing a CO 2 immobilization product.
- CO 2 absorbing concrete As an effort to reduce greenhouse gases, some concrete products (hereinafter referred to as CO 2 absorbing concrete) in which CO 2 is forcibly absorbed or carbonized during manufacture have been put to practical use.
- CO2 absorbing concrete which is a type of CCUS technology (abbreviation of Carbon dioxide Capture, Utilization and Storage, carbon dioxide capture and storage technology), was also mentioned in the "Carbon Recycling Technology Roadmap" announced by the Ministry of Economy, Trade and Industry in 2019. , technology development is being carried out for the spread and expansion.
- Patent Literature 1 discloses a method of forcibly absorbing or carbonating CO 2 during the production of concrete. Specifically, fixation of carbon dioxide, including a contacting step of bringing a carbon dioxide-containing gas into contact with a hardened cementitious material to fix the carbon dioxide contained in the carbon dioxide-containing gas in the hardened cementitious material. A method is disclosed.
- an object of the present invention is to provide a CO 2 -fixing material capable of fixing CO 2 by carbonation treatment and a method for producing the CO 2 -fixed material.
- the present invention is as follows.
- CO 2 fixation materials include a first CO 2 fixation material and a second CO 2 fixation material.
- the first CO 2 fixation material is one or more non-hydraulic compounds selected from the group consisting of ⁇ -2CaO.SiO 2 , 3CaO.2SiO 2 , ⁇ -CaO.SiO 2 and calcium magnesium silicate. including.
- the first CO 2 fixation material further contains Li in the CO 2 fixation material, and its content is 0.001 to 1.0% in terms of oxide. It is presumed that this predetermined amount of Li promotes the formation of vaterite, which is a type of calcium carbonate, among the carbonation of CSH (calcium silicate hydrate). It is thought that a more dense cured state can be easily obtained by.
- containing Li in the CO 2 fixation material means that the non-hydraulic compound in the CO 2 fixation material contains Li 2 O as a chemical composition (confirmed by ICP emission spectroscopy). ), but Li 2 O is not identified by X-ray diffraction measurement (no clear peak of Li 2 O is observed), simply a state in which a non-hydraulic compound and a Li compound are physically mixed It says not. Such a state can be obtained by mixing each raw material and heat-treating it at a high temperature of 1,000° C. or more. Each component and the like will be described below.
- ⁇ -2CaO-SiO 2 is a compound represented by 2CaO.SiO 2 and is known as a low temperature phase . It is completely different from ⁇ -2CaO ⁇ SiO 2 . All of these are represented by 2CaO.SiO 2 , but have different crystal structures and densities.
- 3CaO.2SiO2 3CaO.2SiO 2 is a mineral containing CaO in pseudowollastonite and is called rankinite. Although it is a chemically stable mineral with no hydration activity, it has a large CO 2 fixing effect.
- ⁇ -CaO.SiO 2 ⁇ -CaO ⁇ SiO 2 ( ⁇ -type wollastonite) is a compound represented by CaO ⁇ SiO 2 and is known as a high-temperature phase.
- ⁇ -CaO ⁇ SiO 2 is a low-temperature phase. They are completely different. All of these are represented by CaO.SiO 2 , but have different crystal structures and densities.
- Naturally occurring wollastonite is the low temperature phase ⁇ -CaO.SiO 2 .
- ⁇ -CaO SiO 2 has needle - like crystals and is used as an inorganic fibrous material such as wollastonite fiber . No fixation effect.
- Calcium magnesium silicate is a general term for CaO--MgO-- SiO.sub.2 -based compounds, and in the present embodiment, it is Merwinite represented by 3CaO.MgO.2SiO.sub.2 ( C.sub.3MS.sub.2 ) . , a large CO 2 fixation effect is achieved with mervinite.
- the non-hydraulic compound as described above may be one or two or more, and the content of Li in the non-hydraulic compound (the total if there are more than one) is 0.001 to 1.0 in terms of oxide. 0%, preferably 0.005 to 1.0%, more preferably 0.010 to 0.90%, even more preferably 0.015 to 0.80%. If the Li content is less than 0.001% in terms of oxide, the effect of promoting carbonation cannot be obtained. If it exceeds 1.0%, the cost becomes high.
- the content of Li in terms of oxide can be measured by the method described in Examples.
- ⁇ -2CaO SiO 2 in particular is accompanied by a pulverization phenomenon called dusting during production, so it requires less energy for pulverization than other compounds, and can fix CO 2 over a long period of time. It is preferable in that the effect is large.
- the non-hydraulic compound according to the present embodiment is obtained by blending CaO raw material, SiO 2 raw material, MgO raw material and Li raw material in a predetermined molar ratio and heat-treating the mixture.
- CaO raw materials include, for example, calcium carbonate such as limestone, calcium hydroxide such as slaked lime, by-product slaked lime such as acetylene by-product slaked lime, fine powder generated from waste concrete masses, ready-mixed concrete factories and concrete product factories.
- Concrete sludge (dehydrated cake), incineration ash (coal ash, woody biomass, municipal refuse incineration ash, sewage sludge incineration ash, etc.), steel slag (converter slag, electric furnace slag, etc.) and the like.
- SiO 2 raw materials include silica stone, clay, and various siliceous dusts generated as industrial by-products such as silica fume and fly ash.
- MgO raw materials include magnesium hydroxide, basic calcium carbonate, and dolomite.
- lithium carbonate etc. can be mentioned as a Li raw material. If the CaO raw material, SiO 2 raw material, or MgO raw material contains Li, it is not necessary to newly add the Li raw material.
- Selected from industrial by-products containing CaO such as by-product hydrated lime, fine powder generated from waste concrete mass, concrete sludge, municipal waste incineration ash and sewage sludge incineration ash, from the reduction of non-energy-derived CO 2 emissions during heat treatment.
- 1 type or 2 or more types can be utilized. Among them, it is more preferable to use by-product slaked lime, which contains less impurities than other industrial by-products.
- by-product slaked lime As by-product slaked lime, by-product slaked lime produced in the acetylene gas production process by the calcium carbide method (there are wet and dry products depending on the acetylene gas production method), and the wet dust collection process of the calcium carbide electric furnace. Examples include acetylene by-product slaked lime such as by-product slaked lime contained in the dust captured by.
- the by-product slaked lime contains, for example, 65 to 95% (preferably 70 to 90%) calcium hydroxide, 1 to 10% calcium carbonate, and 0.1 to 6.0% iron oxide (preferably contains 0.1 to 3.0%).
- the above-mentioned heat treatment at a high temperature of 1,000°C or higher is not particularly limited, but can be performed, for example, by using a rotary kiln or an electric furnace.
- the heat treatment temperature is not uniquely determined, it is usually carried out in the range of about 1,000 to 1,800.degree. C., and often in the range of about 1,200 to 1,600.degree.
- This embodiment can also use industrial by-products containing the aforementioned non-hydraulic compounds. In this case, impurities coexist.
- industrial by-products include steelmaking slag and the like.
- the CaO raw material, the SiO 2 raw material, and the MgO raw material may contain impurities, but they pose no particular problem as long as they do not impair the effects of the present invention.
- impurities include Al 2 O 3 , Fe 2 O 3 , TiO 2 , MnO, Na 2 O, K 2 O, S, P 2 O 5 , F, B 2 O 3 and chlorine. be done.
- Coexisting compounds include free calcium oxide, calcium hydroxide, calcium aluminate, calcium aluminosilicate, calcium ferrite, calcium aluminoferrite, calcium phosphate, calcium borate, magnesium silicate, leucite (K 2 O, Na 2 O).Al 2 O 3 .SiO 2 , spinel MgO.Al 2 O 3 , magnetite Fe 3 O 4 , and sulfur compounds such as CaS, Al 2 S 3 and CaC 2 .CaS mentioned above.
- the content of S (sulfur) in the non-hydraulic compound is preferably 1.0% or less, more preferably 0.7% or less in terms of oxide (SO 3 ). , and more preferably 0.5% or less.
- the content is 1.0% or less, a sufficient effect of promoting carbonation (salting) can be obtained, and the setting and curing properties can be kept within an appropriate range.
- the content of S in terms of oxide (SO 3 ) can be measured by fluorescent X-ray measurement. Note that S (sulfur) in the non-hydraulic compound may be present as long as it is about 2% in terms of oxide.
- the content of the non-hydraulic compound (the content of the total amount when multiple types are included) is preferably 65% or more, more preferably 70% or more, and more preferably 75% or more. It is even more preferable to have Hydraulic 2CaO.SiO 2 other than ⁇ -2CaO.SiO 2 can be mixed, and can be mixed up to a maximum of 35%.
- the content of ⁇ -2CaO ⁇ SiO 2 in the non-hydraulic compound is preferably 35% or more, more preferably 45% or more. Also, the upper limit of the content of ⁇ -2CaO ⁇ SiO 2 is not particularly limited. Among steelmaking slags, electric furnace reduction slag or stainless steel slag having a high ⁇ -2CaO ⁇ SiO 2 content is preferred.
- the CaO/SiO 2 molar ratio in the non-hydraulic compound is preferably 0.8-2.3, more preferably 1.2-2.3.
- a molar ratio of 0.8 to 2.3 can further promote carbonation.
- 0.001 to 1.0 part of Li 2 O and 45 to 70 parts of CaO are contained in 100 parts of the CO 2 immobilization material as chemical components. parts, 30 to 55 parts of SiO 2 and 0 to 10 parts of Al 2 O 3 .
- the Li 2 O content can be measured by the method described in Examples below.
- CaO, SiO 2 and Al 2 O 3 can be measured by fluorescent X-rays.
- Li 2 O is 0.002 to 0.5 parts
- CaO is 60 to 70 parts
- SiO 2 is 30 to 45 parts
- Al 2 O 3 is 0.5 parts in 100 parts of the CO 2 fixing material. More preferably, it contains ⁇ 5 parts.
- the total of Li 2 O, CaO, SiO 2 and Al 2 O 3 in 100 parts of the CO 2 fixation material is preferably 90 parts or more, and is preferably 95 to 100 parts. more preferred.
- the water content of the CO 2 fixing material is preferably 10% by mass or less, more preferably 0.01 to 10% by mass, in order to keep the contact between the surface of the non-hydraulic compound and the carbon dioxide-containing gas appropriately. more preferred. This can be determined from the difference between the mass of the sample before drying and the mass after drying by heating at 105°C. Also, the water content of the CO 2 fixing material can be adjusted by heating and drying at 105° C. and then adding an appropriate amount of water and stirring.
- the average particle size of the CO 2 fixation material is preferably 1-100 ⁇ m, more preferably 1-70 ⁇ m.
- the average particle size can be obtained by measuring with a laser diffraction/scattering particle size distribution analyzer.
- the Blaine specific surface area of the CO 2 fixation material (especially when using ⁇ -2CaO.SiO 2 ) is preferably 1,000 to 10,000 cm 2 /g, more preferably 2,500 to 10,000 cm 2 /g. g is more preferred.
- the specific surface area is 2,500 to 10,000 cm 2 /g, the contact area between the particles and the water on the surface of the particles increases, and the elution of Ca is promoted, thereby promoting the carbonation reaction.
- the specific surface area can be obtained by measuring with a blaine air permeation device described in JIS R 5201.
- the CO 2 -fixing material preferably further contains disaccharides such as trehalose, maltose and sucrose in order to form a chelate with Ca eluted in the particle surface water and promote further elution.
- disaccharides such as trehalose, maltose and sucrose
- the disaccharide From the viewpoint of promoting the carbonation reaction, it is preferable to contain 0.5 to 10 parts by mass, more preferably 5 to 10 parts by mass, of the disaccharide with respect to 100 parts by mass of the non-hydraulic compound. Moreover, the content of trehalose in the disaccharide is preferably 90% by mass or more, more preferably 95% by mass or more, in order to obtain a sufficient effect of promoting carbonation.
- fixation of CO2 means that the material is carbonated and CO2 forms a carbonate compound with the material.
- the carbonation rate can be obtained as follows as a ratio of the CaO component in the CO 2 fixation material to the theoretically fixed CO 2 .
- Carbonation rate ( ⁇ M ⁇ 56.08) / (M ⁇ w CaO ⁇ 44.01)
- ⁇ M increased mass due to carbonation [g]
- M mass of CO 2 fixation material before carbonation [g]
- w CaO CaO in CO 2 fixation material before carbonation [wt%]
- the increased mass due to carbonation refers to the mass obtained by subtracting the weight of the sample before carbonation from the weight of the sample after carbonation.
- CaO in the CO 2 fixative before carbonation can be measured by X-ray fluorescence analysis.
- the second CO 2 fixation material is one or more non-hydraulic compounds selected from the group consisting of ⁇ -2CaO.SiO 2 , 3CaO.2SiO 2 , ⁇ -CaO.SiO 2 and calcium magnesium silicate. and disaccharides.
- Disaccharides such as trehalose, maltose, and sucrose form chelates with Ca dissolved in the water on the surface of the CO 2 immobilizing material particles, promoting further dissolution, and thus enhancing the effect of promoting the carbonation reaction. It preferably contains trehalose from the viewpoint of enhancing the effect of promoting the carbonation reaction.
- carbonic acid can be CO 2 can be fixed by carbonization treatment.
- the second CO 2 fixation material essentially contains a non-hydraulic compound and a disaccharide
- the configuration and preferred aspects of the first CO 2 fixation material can be appropriately adopted.
- a method for producing a CO 2 fixation material according to the present invention is a method of carbonation treatment of a CO 2 fixation material at 75° C. or lower and/or 50% RH or higher.
- the carbonation treatment method is not particularly limited, but for example, appropriate heating and/or humidification (addition of water) is performed so that the temperature is 75° C. or lower and/or 50% RH or higher in a carbon dioxide-containing gas atmosphere. and the like.
- the temperature of the carbonation treatment is preferably 5-75°C, more preferably 5-50°C.
- the relative humidity is preferably 50 to 100% RH, more preferably 90 to 100% RH.
- the carbon dioxide-containing gas it is possible to use exhaust gas generated from cement plants and coal-fired power plants, exhaust gas generated during exhaust treatment in painting plants, and the like.
- the proportion of carbon dioxide in the carbon dioxide-containing gas is preferably 5% by volume or more, preferably 10% by volume or more, and more preferably 15% by volume or more.
- Moisture water vapor may be contained in the carbon dioxide-containing gas.
- the CO 2 immobilized product produced as described above can be used, for example, as a cement additive, and can be used as it is as a material for mortar or concrete aggregate, roadbed material, embankment material, backfill material, etc. can also That is, not only can carbon dioxide in the atmosphere be effectively fixed in the CO 2 fixation material, but it can also be used more effectively as a concrete material.
- CO 2 fixation materials A to F were prepared as follows.
- CO2 immobilization material A ⁇ -2CaO ⁇ SiO 2 .
- First-grade reagent calcium carbonate and reagent first-grade silicon dioxide are mixed at a molar ratio of 2:1, and the content of Li in the mixture is 0.1% in terms of oxide (Li 2 O) (inner division substitution), heat-treated at 1,400° C. for 2 hours, and allowed to stand at room temperature to prepare CO2 immobilization material A having a Blaine specific surface area of 4,000 cm 2 /g. bottom.
- CO 2 fixation material B 3CaO.2SiO 2 .
- First-class calcium carbonate and first-class silicon dioxide are mixed at a molar ratio of 3:2, and the content of Li in the mixture is 0.1% (internal division) in terms of oxide (Li 2 O). substitution), heat-treated at 1,400° C. for 2 hours, and allowed to stand at room temperature to prepare CO2 immobilization material B having a Blaine specific surface area of 4,000 cm 2 /g. bottom.
- CO 2 fixing material C ⁇ -CaO.SiO 2 .
- Reagent grade 1 calcium carbonate and reagent grade 1 silicon dioxide are mixed at a molar ratio of 1:1, and the content of Li in the mixture is 0.1% in terms of oxide (Li 2 O) (of which First-grade reagent lithium carbonate was mixed so as to obtain a split substitution), heat-treated at 1,500° C. for 2 hours, allowed to stand to room temperature, and a CO 2 immobilizing material C having a Blaine specific surface area of 4,000 cm 2 /g. was made.
- CO 2 fixation material D 3CaO.MgO.2SiO 2 .
- Reagent grade 1 calcium carbonate, reagent grade 1 magnesium oxide, and reagent grade 1 silicon dioxide are mixed in a molar ratio of 3:1:2, and the content of Li in the mixture is added to oxide (Li 2 O )
- Reagent class 1 lithium carbonate is mixed so that the conversion becomes 0.1% (internal substitution), heat treated at 1,400 ° C. for 2 hours, left to stand at room temperature, Blaine specific surface area is 4,000 cm 2 /g of CO 2 immobilizing material D was produced.
- CO 2 fixing material E ⁇ -2CaO ⁇ SiO 2 .
- Reagent grade 1 calcium carbonate and reagent grade 1 silicon dioxide were mixed at a molar ratio of 2:1, heat-treated at 1,400°C for 2 hours, and left to stand at room temperature to obtain a Blaine specific surface area of 4,000 cm 2 /g. of ⁇ -2CaO SiO 2 was produced.
- CO 2 fixing material F Li 2 O+ ⁇ -2CaO.SiO 2 .
- Reagent grade 1 calcium carbonate and reagent grade 1 silicon dioxide were mixed at a molar ratio of 2:1, heat-treated at 1,400°C for 2 hours, and left to stand at room temperature to obtain a Blaine specific surface area of 4,000 cm 2 /g. of ⁇ -2CaO SiO 2 was produced.
- Lithium carbonate of reagent grade 1 was heat-treated at 1,400° C. for 2 hours and left to stand at room temperature to prepare Li 2 O powder.
- Li 2 O powder (reagent class 1 lithium carbonate heat-treated at 1,400 ° C. for 2 hours) was added to ⁇ -2CaO SiO 2 so that Li 2 O was 0.1% (internal substitution).
- a CO 2 immobilizing material F was produced by inward mixing.
- the oxide-equivalent Li content in each CO 2 fixing material was measured by an ICP emission spectrometer (VISTA-PRO, manufactured by Hitachi High-Tech Science). Then, from the absolute calibration curve method using a diluted SPEX company XSTC-22 ICP mixed solution, it was confirmed that the Li content was the same as the charged amount.
- the measurement conditions are as follows. ⁇ Li measurement wavelength: 670.783 nm ⁇ BG correction: fitting curve method ⁇ Standard solution for calibration curve: SPEX XSTC-22 ICP mixed solution diluted and used Calibration curve range: 0-5 mg / L (0 mg / L, 0.1 mg / L, 0. 5 mg/L, 1 mg/ L, 5 mg / L 5-point calibration curve) ⁇ Quantification by absolute calibration curve method
- CO 2 fixation materials G to I were prepared as follows.
- CO 2 immobilizing material G Reagent first grade calcium carbonate and reagent first grade silicon dioxide are mixed at a CaO/SiO 2 molar ratio of 1.2, and the content of Li in the mixture is added to oxide (Li 2 O)
- Reagent class 1 lithium carbonate was mixed so as to be 0.1% (internal substitution) in terms of conversion, heat-treated at 1,400 ° C. for 2 hours, left to stand at room temperature, and Blaine specific surface area was 4,000 cm. 2 /g CO 2 immobilizing material G was produced.
- CO 2 immobilizing material H Reagent grade 1 calcium carbonate and reagent grade 1 silicon dioxide are mixed at a CaO/SiO 2 molar ratio of 1.8, and the content of Li in the mixture is added to oxide (Li 2 O) Reagent class 1 lithium carbonate was mixed so as to be 0.1% (internal substitution) in terms of conversion, heat-treated at 1,400 ° C. for 2 hours, left to stand at room temperature, and Blaine specific surface area was 4,000 cm. 2 /g of CO 2 immobilizing material H was produced.
- CO 2 immobilization material I Reagent grade 1 calcium carbonate and reagent grade 1 silicon dioxide are mixed at a CaO/SiO 2 molar ratio of 2.3, and the content of Li in the mixture is added to oxide (Li 2 O) Reagent class 1 lithium carbonate was mixed so as to be 0.1% (internal substitution) in terms of conversion, heat-treated at 1,400 ° C. for 2 hours, left to stand at room temperature, and Blaine specific surface area was 4,000 cm. 2 /g of CO 2 fixative I was prepared.
- Powder X-ray diffraction measurement was performed on the produced CO 2 immobilizing material.
- the mineral composition was obtained by analyzing the measurement results with quantitative software.
- a powder X-ray diffractometer a fully automatic multi-purpose X-ray diffractometer "SmartLab” manufactured by Rigaku was used, and "SmartlabStudio II” manufactured by Rigaku was used as quantification software.
- Example 5 Carbonation was carried out in the same manner as in Experimental Example 1 except that CO 2 fixation material A was used and the carbonation in the constant temperature and humidity chamber was changed from 20° C. and 80% RH to the conditions shown in Table 5. conversion rate was calculated. Table 5 shows the results.
- the CO 2 fixation material of the present invention has a high carbonation rate.
- a high carbonation rate was obtained when the Li content was 0.001 to 1.0% by mass in terms of oxide (Li 2 O).
- a good carbonation rate was obtained at a CaO/SiO 2 molar ratio of 1.0 to 2.3.
- the effect of carbonation was greater when disaccharides were added. Especially when trehalose was added, the effect of carbonation was enhanced.
- a good carbonation rate was obtained by setting the carbonation to 75° C. or lower and/or 50% RH or higher.
- CO 2 can be fixed by carbonating the CO 2 -fixing material of the present invention at a temperature of 75° C. or lower and/or a humidity of 50% RH or higher.
- the CO 2 immobilized material obtained by carbonating the CO 2 immobilizing material can be used as a cement additive in the fields of civil engineering and construction. It can be effectively used as a material such as a backfilling material.
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Abstract
Description
[2] γ-2CaO・SiO2、3CaO・2SiO2、α-CaO・SiO2、及びカルシウムマグネシウムシリケートからなる群から選ばれる1種又は2種以上の非水硬性化合物と、二糖類とを含むCO2固定化材。
[3] 前記非水硬性化合物におけるCaO/SiO2モル比が0.8~2.3である[1]又は[2]に記載のCO2固定化材。
[4] さらに、二糖類を含む[1]に記載のCO2固定化材。
[5] 前記CO2固定化材100質量部に対して前記二糖類を0.5~10質量部含有する[1]、[2]、[4]のいずれかに記載のCO2固定化材。
[6] 前記二糖類がトレハロースを含む[1]、[2]、[4]、[5]のいずれかに記載のCO2固定化材。
[7] 75℃以下及び/又は50%RH以上で、[1]~[6]のいずれかに記載のCO2固定化材の炭酸化処理を行うCO2固定化物の製造方法。
本発明の実施形態に係るCO2固定化材としては、第1のCO2固定化材及び第2のCO2固定化材が挙げられる。
第1のCO2固定化材は、γ-2CaO・SiO2、3CaO・2SiO2、α-CaO・SiO2、及びカルシウムマグネシウムシリケートからなる群から選ばれる1種又は2種以上の非水硬性化合物を含む。第1のCO2固定化材は、さらに、当該CO2固定化材中にLiを含有し、その含有量が酸化物換算で0.001~1.0%となっている。この所定量のLiにより、C-S-H(ケイ酸カルシウム水和物)の炭酸化のうち、炭酸カルシウムの1種であるバテライトの生成が促進されると推定され、炭酸(塩)化養生によってより緻密な硬化状態が得られやすくなると考えられる。
γ-2CaO・SiO2とは、2CaO・SiO2で表される化合物のうちで、低温相として知られるものであり、高温相であるα-2CaO・SiO2やα’-2CaO・SiO2、β-2CaO・SiO2とは全く異なるものである。これらはいずれも、2CaO・SiO2で表されるが、結晶構造や密度は異なっている。
3CaO・2SiO2とは、偽ケイ灰石にCaOを含有する鉱物でランキナイトと呼ばれる。水和活性は無く化学的に安定な鉱物であるが、CO2固定化効果が大きい。
α-CaO・SiO2(α型ワラストナイト)とは、CaO・SiO2で表される化合物のうちで、高温相として知られるものであり、低温相であるβ-CaO・SiO2とは全く異なるものである。これらはいずれも、CaO・SiO2で表されるが、結晶構造や密度は異なっている。
カルシムマグネシウムシリケートとは、CaO-MgO-SiO2系化合物を総称するものであるが、本実施形態では、3CaO・MgO・2SiO2(C3MS2)で表されるメルヴィナイト(Merwinite)であることが好ましく、メルヴィナイトによれば大きいCO2固定化効果が達成される。
化学成分としては、CO2固定化材100部中、Li2Oは0.002~0.5部、CaOは60~70部、SiO2は30~45部、Al2O3は0.5~5部含むことがより好ましい。
さらに、化学成分として、CO2固定化材100部中、Li2O、CaO、SiO2、及びAl2O3の合計は、90部以上であることが好ましく、95~100部であることがより好ましい。
当該は乾燥前の試料の質量と105℃で加熱乾燥させた後の質量差から求めることができる。また、CO2固定化材の含水率は105℃で加熱乾燥させた後に適当量の水を加えて攪拌することにより調整することができる。
ここに、ΔM:炭酸化による増加質量[g]、M:炭酸化前のCO2固定化材の質量[g]、wCaO:炭酸化前のCO2固定化材中のCaO[wt%]
上記式中、炭酸化による増加質量とは、炭酸化後のサンプル重量から炭酸化前のサンプル重量を引いた質量をいう。炭酸化前のCO2固定化材中のCaOは、蛍光X線分析によって測定することができる。
第2のCO2固定化材は、γ-2CaO・SiO2、3CaO・2SiO2、α-CaO・SiO2、及びカルシウムマグネシウムシリケートからなる群から選ばれる1種又は2種以上の非水硬性化合物と、二糖類とを含む。
本発明に係るCO2固定化物の製造方法は、75℃以下及び/又は50%RH以上でCO2固定化材の炭酸化処理を行う方法である。
炭酸化処理の方法は、特に限定されるものではないが、例えば、二酸化炭素含有ガス雰囲気中で75℃以下及び/又は50%RH以上となるように適宜加熱及び/又は加湿(加水)等して処理する方法等が挙げられる。
二酸化炭素含有ガス中には水分(水蒸気)が含まれていてもよい。
下記のようにしてCO2固定化材A~Fを作製した。
CO2固定化材A:γ-2CaO・SiO2。試薬1級の炭酸カルシウムと試薬1級の二酸化ケイ素とをモル比2:1で混合し、さらに混合物に対してLiの含有量が酸化物(Li2O)換算で0.1%(内割置換)となるように試薬1級の炭酸リチウムを混合し、1,400℃で2時間熱処理し、室温まで放置して、ブレーン比表面積が4,000cm2/gのCO2固定化材Aを作製した。
また、試薬1級の炭酸リチウムを1,400℃で2時間熱処理し、室温まで放置してLi2O粉末を作製した。
Li2Oが0.1%(内割置換)となるようにLi2O粉末(試薬1級の炭酸リチウムを1,400℃で2時間熱処理したもの)をγ-2CaO・SiO2に対して内割混合して、CO2固定化材Fを作製した。
なお、各CO2固定化材における酸化物換算のLi含有量は、ICP発光分光分析装置(日立ハイテクサイエンス社製、VISTA-PRO)によって測定した。そして、SPEX社XSTC-22 ICP用混合液を希釈して用いた絶対検量線法から、仕込み量と同量のLi含有量であることを確認している。なお、測定条件は下記のとおりである。
・Li測定波長:670.783nm
・BG補正:フィッティングカーブ法
・検量線用標準溶液:SPEX社XSTC-22 ICP用混合液を希釈して使用
検量線範囲:0-5mg/L(0mg/L,0.1mg/L,0.5mg/L,1mg/
L,5mg/Lの5点検量線)
・絶対検量線法で定量
表1に示す各所定期間で炭酸化させた後、105℃で24時間乾燥させた試料の質量を測定し、炭酸化前後の質量変化から既述の式(1)により炭酸化率を算出した。結果を表1に示す。
実験1のCO2固定化材Aと固定化材Cの各作製において、混合物に対してLiの含有率が酸化物(Li2O)換算で0.0005%、0.002%、0.006%、0.1%、0.15%、0.8%、0.9%、1.0%、1.1%(それぞれ内割置換)となるように試薬1級の炭酸リチウムを混合した以外は実験1のCO2固定化材Aと固定化材Cの作製と同様にして、CO2固定化材A-1~A-7、CO2固定化材C-1~C-7を作製した。各CO2固定化材について実験1と同様な評価を行った。結果を表2に示す。
下記のようにしてCO2固定化材G~Iを作製した。
CO2固定化材G:試薬1級の炭酸カルシウムと試薬1級の二酸化ケイ素とをCaO/SiO2モル比1.2で混合し、さらに混合物に対してLiの含有量が酸化物(Li2O)換算で0.1%(内割置換)となるように試薬1級の炭酸リチウムを混合し、1,400℃で2時間熱処理し、室温まで放置して、ブレーン比表面積が4,000cm2/gのCO2固定化材Gを作製した。
CO2固定化材A100質量部に対して、表3に示す所定の割合となるように各種の助剤を添加して混合した以外は実験例1と同様にして、炭酸化を行い、炭酸化率を算出した。結果を表4に示す。
CO2固定化材Aを使用し、恒温恒湿室内での炭酸化を20℃80%RHから、表5に示す条件に変更した以外は実験例1と同様にして、炭酸化を行い、炭酸化率を算出した。結果を表5に示す。
表2に結果より、Liの含有量が酸化物(Li2O)換算で0.001~1.0質量%であるとき、高い炭酸化率が得られた。
表3の結果より、CaO/SiO2モル比が1.0~2.3で良好な炭酸化率が得られた。
表4の結果より、二糖類を添加した場合に炭酸化の効果が大きかった。特にトレハロースを添加した場合に炭酸化の効果がより大きくなった。
表5の結果より、炭酸化を75℃以下及び/又は50%RH以上とすることで良好な炭酸化率が得られた。
CO2固定化材E100質量部に対して、表6に示す所定の割合となるように各種の助剤を添加して混合した以外は実験例1と同様にして、炭酸化を行い、炭酸化率を算出した。結果を表6に示す。
Claims (7)
- γ-2CaO・SiO2、3CaO・2SiO2、α-CaO・SiO2、及びカルシウムマグネシウムシリケートからなる群から選ばれる1種又は2種以上の非水硬性化合物を含むCO2固定化材であって、前記CO2固定化材中にLiを含有し、該Liの含有率が酸化物換算で0.001~1.0質量%であるCO2固定化材。
- γ-2CaO・SiO2、3CaO・2SiO2、α-CaO・SiO2、及びカルシウムマグネシウムシリケートからなる群から選ばれる1種又は2種以上の非水硬性化合物と、二糖類とを含むCO2固定化材。
- 前記非水硬性化合物におけるCaO/SiO2モル比が0.8~2.3である請求項1又は2に記載のCO2固定化材。
- さらに、二糖類を含む請求項1に記載のCO2固定化材。
- 前記CO2固定化材100質量部に対して前記二糖類を0.5~10質量部含有する請求項2又は4に記載のCO2固定化材。
- 前記二糖類がトレハロースを含む請求項2、4、及び、5のいずれか1項に記載のCO2固定化材。
- 75℃以下及び/又は50%RH以上で、請求項1~6のいずれか1項に記載のCO2固定化材の炭酸化処理を行うCO2固定化物の製造方法。
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991004225A1 (en) * | 1989-09-25 | 1991-04-04 | Japan Insulation Co., Ltd. | Composite primary particle of noncrystalline silica, composite secondary particle of noncrystalline silica, shaped form thereof and production thereof |
JP2001276566A (ja) * | 2000-04-04 | 2001-10-09 | Hokkaido Electric Power Co Inc:The | 排煙処理剤の製造方法 |
JP2004051421A (ja) * | 2002-07-19 | 2004-02-19 | Denki Kagaku Kogyo Kk | セメント混和材及びセメント組成物 |
JP2006131474A (ja) * | 2004-11-09 | 2006-05-25 | Denki Kagaku Kogyo Kk | 水硬性セメント組成物およびセメントコンクリート硬化体 |
CN109621891A (zh) * | 2018-12-24 | 2019-04-16 | 华中科技大学 | 一种锂基co2吸附剂及其制备方法 |
CN111974344A (zh) * | 2020-08-18 | 2020-11-24 | 上海大学 | 一种二氧化碳捕获剂及其制备方法 |
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JP6057389B2 (ja) * | 2012-06-27 | 2017-01-11 | デンカ株式会社 | γ−2CaO・SiO2の製造方法 |
JP7378213B2 (ja) | 2018-07-11 | 2023-11-13 | 太平洋セメント株式会社 | 二酸化炭素の固定化方法 |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991004225A1 (en) * | 1989-09-25 | 1991-04-04 | Japan Insulation Co., Ltd. | Composite primary particle of noncrystalline silica, composite secondary particle of noncrystalline silica, shaped form thereof and production thereof |
JP2001276566A (ja) * | 2000-04-04 | 2001-10-09 | Hokkaido Electric Power Co Inc:The | 排煙処理剤の製造方法 |
JP2004051421A (ja) * | 2002-07-19 | 2004-02-19 | Denki Kagaku Kogyo Kk | セメント混和材及びセメント組成物 |
JP2006131474A (ja) * | 2004-11-09 | 2006-05-25 | Denki Kagaku Kogyo Kk | 水硬性セメント組成物およびセメントコンクリート硬化体 |
CN109621891A (zh) * | 2018-12-24 | 2019-04-16 | 华中科技大学 | 一种锂基co2吸附剂及其制备方法 |
CN111974344A (zh) * | 2020-08-18 | 2020-11-24 | 上海大学 | 一种二氧化碳捕获剂及其制备方法 |
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