WO2008035773A1 - Catalyst for oxidation of metal mercury - Google Patents
Catalyst for oxidation of metal mercury Download PDFInfo
- Publication number
- WO2008035773A1 WO2008035773A1 PCT/JP2007/068417 JP2007068417W WO2008035773A1 WO 2008035773 A1 WO2008035773 A1 WO 2008035773A1 JP 2007068417 W JP2007068417 W JP 2007068417W WO 2008035773 A1 WO2008035773 A1 WO 2008035773A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- catalyst
- mercury
- exhaust gas
- vanadium
- molybdenum
- Prior art date
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- 239000003054 catalyst Substances 0.000 title claims abstract description 110
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 39
- 229910052753 mercury Inorganic materials 0.000 title claims abstract description 37
- 230000003647 oxidation Effects 0.000 title claims abstract description 35
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 17
- 239000002184 metal Substances 0.000 title claims abstract description 17
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 26
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 18
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000011733 molybdenum Substances 0.000 claims abstract description 17
- 239000002131 composite material Substances 0.000 claims abstract description 10
- 230000001590 oxidative effect Effects 0.000 claims abstract description 7
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 4
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 26
- 239000003085 diluting agent Substances 0.000 claims description 26
- 239000007789 gas Substances 0.000 claims description 26
- 229940008718 metallic mercury Drugs 0.000 claims description 18
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 14
- 239000000377 silicon dioxide Substances 0.000 claims description 12
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
- 230000003197 catalytic effect Effects 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 150000002366 halogen compounds Chemical class 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims 1
- 229910016040 MoV2O8 Inorganic materials 0.000 abstract 1
- 239000002075 main ingredient Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 21
- 239000010410 layer Substances 0.000 description 16
- 239000000843 powder Substances 0.000 description 14
- 239000000203 mixture Substances 0.000 description 11
- 239000002002 slurry Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 7
- 238000010304 firing Methods 0.000 description 7
- 238000011068 loading method Methods 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000000969 carrier Substances 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
- 239000012784 inorganic fiber Substances 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 239000010936 titanium Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000011268 mixed slurry Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 5
- 239000004480 active ingredient Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- -1 for example Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 3
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 3
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 description 3
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000010718 Oxidation Activity Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 2
- 235000018660 ammonium molybdate Nutrition 0.000 description 2
- 239000011609 ammonium molybdate Substances 0.000 description 2
- 229940010552 ammonium molybdate Drugs 0.000 description 2
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 description 2
- XAYGUHUYDMLJJV-UHFFFAOYSA-Z decaazanium;dioxido(dioxo)tungsten;hydron;trioxotungsten Chemical compound [H+].[H+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O XAYGUHUYDMLJJV-UHFFFAOYSA-Z 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- ALTWGIIQPLQAAM-UHFFFAOYSA-N metavanadate Chemical compound [O-][V](=O)=O ALTWGIIQPLQAAM-UHFFFAOYSA-N 0.000 description 2
- 239000011669 selenium Substances 0.000 description 2
- 239000011949 solid catalyst Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 150000003682 vanadium compounds Chemical class 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 208000024172 Cardiovascular disease Diseases 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- KAAPKANDWQEIRY-UHFFFAOYSA-M N.[O-2].[O-2].[OH-].O.O.[V+5] Chemical compound N.[O-2].[O-2].[OH-].O.O.[V+5] KAAPKANDWQEIRY-UHFFFAOYSA-M 0.000 description 1
- 208000012902 Nervous system disease Diseases 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910021542 Vanadium(IV) oxide Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- RCTYPNKXASFOBE-UHFFFAOYSA-M chloromercury Chemical compound [Hg]Cl RCTYPNKXASFOBE-UHFFFAOYSA-M 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 208000017169 kidney disease Diseases 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- ABIXGWOYCAWCSW-UHFFFAOYSA-N mercury methylmercury Chemical compound [Hg].[Hg]C ABIXGWOYCAWCSW-UHFFFAOYSA-N 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000005078 molybdenum compound Substances 0.000 description 1
- 150000002752 molybdenum compounds Chemical class 0.000 description 1
- VLAPMBHFAWRUQP-UHFFFAOYSA-L molybdic acid Chemical compound O[Mo](O)(=O)=O VLAPMBHFAWRUQP-UHFFFAOYSA-L 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 150000002896 organic halogen compounds Chemical class 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 235000015170 shellfish Nutrition 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000015393 sodium molybdate Nutrition 0.000 description 1
- 239000011684 sodium molybdate Substances 0.000 description 1
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 231100000378 teratogenic Toxicity 0.000 description 1
- 230000003390 teratogenic effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- GRUMUEUJTSXQOI-UHFFFAOYSA-N vanadium dioxide Chemical compound O=[V]=O GRUMUEUJTSXQOI-UHFFFAOYSA-N 0.000 description 1
Classifications
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- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/24—Chromium, molybdenum or tungsten
- B01J23/28—Molybdenum
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8665—Removing heavy metals or compounds thereof, e.g. mercury
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- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/20—Vanadium, niobium or tantalum
- B01J23/22—Vanadium
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/24—Chromium, molybdenum or tungsten
- B01J23/30—Tungsten
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- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
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- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
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- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0215—Coating
- B01J37/0225—Coating of metal substrates
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- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/024—Multiple impregnation or coating
- B01J37/0244—Coatings comprising several layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20723—Vanadium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20769—Molybdenum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20776—Tungsten
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- 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
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
Definitions
- the present invention relates to an oxidation catalyst for metallic mercury contained in exhaust gas, and a method for purifying exhaust gas.
- trace elements (mercury (Hg), selenium (Se), arsenic (As), cadmium (Cd), lead) contained in the exhaust gas generated with the combustion of coal and having a concentration of 0.1% or less For Pd), etc.
- elemental mercury which has a high vapor pressure, is a trace amount that is easily released to the air, but if it is exposed to the human body, it causes neurological disorder, renal disorder and cardiovascular disease.
- inorganic mercury released to the atmosphere is absorbed by a lake or the sea, the inorganic mercury changes to organic mercury (methyl mercury). If these organic mercury is absorbed by the human body through fish and shellfish, it causes teratogenic disorders. As a result, strict regulations are being imposed on mercury emissions worldwide, particularly in the United States.
- Patent Document 3 discloses a method for removing nitrogen oxides using a catalyst whose catalytic activity is unlikely to be reduced by volatile metal compounds in exhaust gas
- Patent Document 4 discloses titanium oxide (TiO 2) and titanium oxide.
- a catalyst for removing an organic halogen compound containing a mixture of these, which further contains a complex oxide of vanadium and molybdenum, is disclosed.
- the Ti-Mo-V catalyst or Ti-WV catalyst as described above reduces the oxidation efficiency of metallic mercury when the temperature of the exhaust gas is high! /, Or when the concentration of halogen compounds in the exhaust gas is low. .
- the oxidation efficiency of metal mercury can be improved. In this method, it is a big problem that the oxidation activity of SO also increases with the increase of the amount of catalyst.
- Patent Literatures 3 and 4 disclose the oxidation removal of metallic mercury! /, ...!
- Patent Document 1 JP 2005-125211 A1
- Patent Document 2 JP2003- 53142A1
- Patent Document 3 JP 01-176431 A1
- Patent Document 4 JP 2001- 219066 A1
- An object of the present invention is to provide a catalyst which has higher mercury oxidation performance than conventional catalysts without increasing the amount of catalyst and which does not enhance SO oxidation performance.
- Mo—V composite oxide for example, MoV 2 O is used.
- Mo-V complex acid for example, MoV 2 O is used.
- the product may be diluted with one or more diluents selected from silica, titania, alumina, and zirconia to make it possible! It is desirable that the mixing molar ratio of the diluent and the Mo-V complex oxide be in the range of 0/100 to 90/10.
- the present inventors used an Mo-V complex oxide as a component having catalytic activity, and supported the Mo-V complex oxide only on the surface of a plate-like or honeycomb-like porous support in a layer form. It was a catalyst.
- the present catalyst is a catalyst capable of more efficiently oxidizing metallic mercury in exhaust gas in the presence of oxygen or hydrogen chloride, and is a Mo-V complex oxide only on the surface of a plate-like or honeycomb-like porous support. Is characterized in that high performance can be realized simply by
- the main active component in the present catalyst is, for example, Mo-V complex oxidation represented in the form of MoV 2 O
- the mercury oxidation performance of this catalyst is higher than that of the catalyst in which oxides of Mo and V are independently present.
- the oxidation reaction of mercury is a reaction that progresses well on the surface of the catalyst because the diffusion rate of gas in the pores in the catalyst is rate-limiting, the oxidation reaction of SO has a slow reaction rate.
- the inside of the catalyst also depends largely on the absolute amount of the catalyst. For this reason, by supporting the Mo-V complex oxide in layers only on the surface of the porous support and forming a catalyst having no active point inside, it is possible to enhance the oxidation performance of SO only by the oxidation performance of mercury. It is possible to raise
- the catalytic active site and the metallic mercury are in a state of being easily in contact with each other. For this reason, mercury oxidation performance can be obtained even with a small amount of active ingredient, as compared with the case where the Mo-V complex oxide is not diluted.
- the above-described diluent may be used as a filler between the porous carrier and the active ingredient during the coating process. Since it also plays a role as an inductor, the mixed slurry of the Mo-V complex oxide and the diluent has the advantage of improving the wear resistance of the catalyst surface after coating.
- FIG. 1 shows the results of X-ray diffraction analysis of the composition of the Mo-V catalyst described in Example 1 and Comparative Example 1.
- molybdic acid or molybdenum trioxide is used as a molybdenum raw material, in addition to generally known alkali molybdates such as ammonium molybdate and sodium molybdate.
- alkali molybdates such as ammonium molybdate and sodium molybdate.
- an alkaline molybdate the use of an alkali molybdate containing an alkali metal or alkaline earth metal such as sodium, potassium or magnesium may result in catalyst poisoning of these alkali components, which may accelerate catalyst deterioration.
- ammonium molybdate is used.
- vanadium raw material it is desirable to use, for example, vanadium dioxide, vanadyl borate etc., which are good when vanadium compounds having a vanadium valence of 4 or less are used.
- the Mo--V composite oxide can be prepared by a known method in which one or more of the above-described molybdenum raw material and vanadium raw material are mixed, and the mixed solution is heated and mixed, and then dried and / or calcined. At this time, if the firing temperature is too low, the combination of molybdenum and vanadium becomes insufficient, and if the temperature is too high, the particle size of the Mo-V composite oxide becomes too large. Force to be S preferred.
- a variety of inorganic porous carriers can be used as carriers for coating the Mo-V complex oxide.
- honeycomb-like carriers obtained by corrugating inorganic fiber sheets, non-woven fabric sheets made of inorganic fibers And a ceramic honeycomb carrier such as cordierite and alumina, and a net-like product in which inorganic fiber yarns such as E glass fibers are woven in a net shape.
- honeycomb-like carriers obtained by corrugating inorganic fiber sheets, non-woven fabric sheets made of inorganic fibers And a ceramic honeycomb carrier such as cordierite and alumina, and a net-like product in which inorganic fiber yarns such as E glass fibers are woven in a net shape.
- a net-like material such as a wire mesh or metal lath.
- the loading amount of Mo-V complex oxide 50 to 300 g / m 2 (thickness of the catalyst layer:. 0 ⁇ 05-0 3mm) is preferably set to, 150 to 200 g / m 2 (Catalyst layer thickness : It is easy to get good results if it is 0.15 to 0.2 mm).
- the firing temperature may be set in the range of 400 to 600 ° C.
- the diluent to be used may be silica, titania, alumina or zirco if it is inert to the oxidation reaction itself. You can use oxide powder such as yours. Two or more of these diluents may be used in combination.
- the mixing ratio of the diluent to the Mo-V complex oxide can be freely selected according to the desired amount of catalyst and the method of coating treatment.
- the mixing molar ratio of the diluent and the Mo-V complex oxide is in the range of 0/100 to 90/10, if the proportion of the diluent is increased, the particles of the Mo-V complex oxide become particles of the diluent. It is likely to be highly dispersed on the surface, and the adhesion of the active ingredient when coated on a porous carrier is improved, so that it is easy to give good results.
- the carrier for coating the diluent / Mo-V composite oxide various porous carriers similar to those described above can be used.
- the method of coating a diluent / Mo-V complex oxide on these various inorganic porous carriers can be obtained by adding an inorganic porous carrier to a slurry obtained by adding water to a mixture of a diluent and an Mo-V complex oxide. After impregnating, the method of drying and / or firing or the method of transferring the slurry to the surface of the carrier using a roller impregnated with a slurry can be used.
- the loading amount of the diluent / Mo-V composite oxide is preferably 50 to 200 g / m 2 (catalyst layer thickness: 0.50 to 0.2 mm), but 100 to 150 g / m 2 Favorable results can be easily obtained by using (catalyst layer thickness: 0.;! To 0.15 mm).
- the firing temperature may be set in the range of 400 to 600 ° C.
- SUS430 steel strip was metallurgically processed to create a mesh-like substrate with an opening of about 2 mm.
- the catalyst paste was placed on this base material, and passed through a pressure roller to press-bond the paste between the meshes of the base material and to the surface of the base material to form a plate having a thickness of 0.7 mm.
- the plate-like product was dried at 150 ° C. for 2 hours and then fired in the atmosphere at 500 ° C. for 2 hours to obtain a plate-like porous carrier.
- Molybdate ammonium and vanadium sol (VO sol: 20 wt%) at an atomic ratio of Mo / V
- the Mo-V catalyst is supported in layers only on the surface of the plate-like porous support.
- the Mo-V catalyst of this example is formed mainly of the Mo-V complex oxide.
- a plate-like catalyst was prepared in the same manner as in Example 1 except that the vanadium raw material was changed from vanadium sol to vanadyl borate. Also in this example, the Mo-V catalyst is supported in layers only on the surface of the plate-like porous carrier, and is formed mainly of the Mo-V complex oxide.
- a plate-like catalyst was prepared in the same manner as in Example 1 except that the vanadium raw material was changed to metavanadate ammonium.
- the Mo-V catalyst is supported in layers only on the surface of the plate-like porous support.
- the Mo-V catalyst of this comparative example is formed using Mo-V complex oxide as a main component, as will be described later! (Comparative example 2)
- a catalyst paste was obtained. Metal lath processing of SUS430 steel strip separately from this Create a mesh-like substrate with an opening of about 2 mm, place the catalyst paste on this substrate, pass the pressure roller and press-bond the catalyst between the meshes of the substrate and on the surface to make the thickness 0 A 7 mm plate catalyst was prepared. The obtained catalyst was dried at 150 ° C. for 2 hours and then calcined at 500 ° C. in the atmosphere for 2 hours.
- the complex oxide of MoV 2 O is present as the main component.
- the catalysts (Examples 1 and 2) having formed the Mo—V complex oxide were compared with the catalyst in which the oxides of molybdenum and vanadium were present alone (Comparative Example 1). Also efficiency It is possible to oxidize metallic mercury. Furthermore, by forming a layer of Mo-V complex oxide only on the surface of the catalyst, the active component of the catalyst that oxidizes metallic mercury is more uniformly dispersed in the catalyst (comparative example 2) than SO (comparative example 2) The oxidation rate can be kept low.
- a plate-like catalyst was prepared in the same manner as in Example 3 except that the diluent was changed to titanium oxide powder.
- a plate-like catalyst was prepared in the same manner as in Comparative Example 5 except that the diluent was changed to titanium oxide powder.
- the catalyst component is diluted with a suitable diluent such as silica or titania, the catalyst having the complex oxide of MoV 2 O supported only on the surface of the plate-like porous support has a high strength.
- the catalyst V is also formed into a plate-like catalyst
- the invention is not limited to the plate-like one.
- other forms may be used.
- the complex oxide of Mo—V may be formed in a layer on the surface of the porous carrier.
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Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07807748A EP2075060A4 (en) | 2006-09-22 | 2007-09-21 | CATALYST FOR THE OXIDATION OF METALLIC MERCURY |
CN2007800353177A CN101528343B (zh) | 2006-09-22 | 2007-09-21 | 金属汞的氧化催化剂 |
JP2008535406A JP5097709B2 (ja) | 2006-09-22 | 2007-09-21 | 金属水銀の酸化触媒 |
KR1020097000777A KR101153533B1 (ko) | 2006-09-22 | 2007-09-21 | 금속 수은의 산화 촉매 |
US12/441,778 US7842644B2 (en) | 2006-09-22 | 2007-09-21 | Catalyst for oxidation of metal mercury |
CA2662593A CA2662593C (en) | 2006-09-22 | 2007-09-21 | Catalyst for oxidation of metal mercury |
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JP2006-256639 | 2006-09-22 | ||
JP2006256639 | 2006-09-22 |
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WO2008035773A1 true WO2008035773A1 (en) | 2008-03-27 |
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PCT/JP2007/068417 WO2008035773A1 (en) | 2006-09-22 | 2007-09-21 | Catalyst for oxidation of metal mercury |
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US (1) | US7842644B2 (ja) |
EP (1) | EP2075060A4 (ja) |
JP (1) | JP5097709B2 (ja) |
KR (1) | KR101153533B1 (ja) |
CN (1) | CN101528343B (ja) |
CA (1) | CA2662593C (ja) |
WO (1) | WO2008035773A1 (ja) |
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- 2007-09-21 JP JP2008535406A patent/JP5097709B2/ja active Active
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- 2007-09-21 US US12/441,778 patent/US7842644B2/en active Active
- 2007-09-21 CN CN2007800353177A patent/CN101528343B/zh active Active
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JP2010022974A (ja) * | 2008-07-23 | 2010-02-04 | Ihi Corp | 排ガス処理方法及び排ガス処理装置 |
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US8288309B2 (en) | 2009-10-01 | 2012-10-16 | Mitsubishi Heavy Industries, Ltd. | Mercury oxidation catalyst and method for producing the same |
JP5357974B2 (ja) * | 2009-10-01 | 2013-12-04 | 三菱重工業株式会社 | 水銀酸化触媒及びその製造方法 |
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WO2011040559A1 (ja) * | 2009-10-01 | 2011-04-07 | 三菱重工業株式会社 | 水銀酸化触媒及びその製造方法 |
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JPWO2018066659A1 (ja) * | 2016-10-05 | 2019-08-29 | 日立造船株式会社 | 触媒担持構造体およびその製造方法 |
JP2022009470A (ja) * | 2016-10-05 | 2022-01-14 | 日立造船株式会社 | 触媒担持構造体およびその製造方法 |
JP7257483B2 (ja) | 2016-10-05 | 2023-04-13 | 日立造船株式会社 | 触媒担持構造体およびその製造方法 |
Also Published As
Publication number | Publication date |
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JP5097709B2 (ja) | 2012-12-12 |
EP2075060A1 (en) | 2009-07-01 |
CA2662593C (en) | 2014-11-25 |
KR20090075787A (ko) | 2009-07-09 |
US7842644B2 (en) | 2010-11-30 |
US20090311155A1 (en) | 2009-12-17 |
KR101153533B1 (ko) | 2012-06-11 |
CN101528343B (zh) | 2012-04-25 |
EP2075060A4 (en) | 2010-05-19 |
CN101528343A (zh) | 2009-09-09 |
JPWO2008035773A1 (ja) | 2010-01-28 |
CA2662593A1 (en) | 2008-03-27 |
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