WO2005120686A1 - 一酸化炭素除去用触媒及び該触媒を用いた一酸化炭素除去方法 - Google Patents
一酸化炭素除去用触媒及び該触媒を用いた一酸化炭素除去方法 Download PDFInfo
- Publication number
- WO2005120686A1 WO2005120686A1 PCT/JP2005/008948 JP2005008948W WO2005120686A1 WO 2005120686 A1 WO2005120686 A1 WO 2005120686A1 JP 2005008948 W JP2005008948 W JP 2005008948W WO 2005120686 A1 WO2005120686 A1 WO 2005120686A1
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- WIPO (PCT)
- Prior art keywords
- catalyst
- carbon monoxide
- gas
- carbon dioxide
- carbon
- Prior art date
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- 239000003054 catalyst Substances 0.000 title claims abstract description 211
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 229910002091 carbon monoxide Inorganic materials 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 61
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 243
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 121
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 121
- 239000010931 gold Substances 0.000 claims abstract description 102
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 100
- 229910052737 gold Inorganic materials 0.000 claims abstract description 100
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 89
- 239000002105 nanoparticle Substances 0.000 claims abstract description 72
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 52
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000002245 particle Substances 0.000 claims abstract description 27
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 17
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- 239000010457 zeolite Substances 0.000 claims description 48
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical group O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 46
- 229910021536 Zeolite Inorganic materials 0.000 claims description 45
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- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052680 mordenite Inorganic materials 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- DCKVFVYPWDKYDN-UHFFFAOYSA-L oxygen(2-);titanium(4+);sulfate Chemical compound [O-2].[Ti+4].[O-]S([O-])(=O)=O DCKVFVYPWDKYDN-UHFFFAOYSA-L 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- HYXGAEYDKFCVMU-UHFFFAOYSA-N scandium oxide Chemical compound O=[Sc]O[Sc]=O HYXGAEYDKFCVMU-UHFFFAOYSA-N 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 229910000348 titanium sulfate Inorganic materials 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
- YONPGGFAJWQGJC-UHFFFAOYSA-K titanium(iii) chloride Chemical compound Cl[Ti](Cl)Cl YONPGGFAJWQGJC-UHFFFAOYSA-K 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 238000004627 transmission electron microscopy Methods 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 231100000925 very toxic Toxicity 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 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
- B01D53/34—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
- B01D53/864—Removing carbon monoxide or hydrocarbons
-
- 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
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/48—Silver or gold
- B01J23/52—Gold
-
- 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
- B01J35/20—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state
- B01J35/23—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/106—Gold
-
- 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
- B01D2257/502—Carbon monoxide
-
- 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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
-
- 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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
-
- 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
- B01J37/03—Precipitation; Co-precipitation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24149—Honeycomb-like
Definitions
- the present invention relates to a catalyst for removing carbon monoxide and a method for removing carbon monoxide using the catalyst.
- the present invention relates to a catalyst for removing carbon monoxide, and a method for removing gaseous carbon monoxide containing carbon monoxide using the catalyst.
- Monocarbon is generally a gas generated by incomplete combustion of organic matter. If it is present in the air of a very toxic living environment, it will have a serious effect on the human body. Therefore, there is a strong demand for the development of an effective removal technology using a room temperature catalyst or an adsorbent.
- Daily sources of carbon dioxide include smoking and exhaust gas from automobiles. Also, in the event of incomplete combustion due to fires, gas leaks, boiler or heating equipment troubles, high concentrations and large amounts of carbon monoxide are released into the air.
- hopcalite copper-manganese composite oxidized product
- Hopcalite is a catalyst that can convert iodide carbon into diacid carbon at normal temperature, but its performance is greatly reduced in the concentration range of 0.2-0.3% compared to the high concentration range of 1%, There is a disadvantage that the activity is remarkably lost due to moisture, so that it cannot be used immediately after opening.
- the concentration of carbon dioxide in indoor air is set at 50 ppm or less according to the Office Hygiene Standards Rules (Occupational Safety and Health Law) in offices as workplaces. In offices with air conditioners, supply air cleanliness As a criterion, the concentration of carbon is not more than 10 ppm.
- hopcalite which is also composed only of metal oxide, is effective only when treating a high concentration of carbon oxide.
- noble metal catalysts such as platinum and noradium can continuously oxidize and remove carbon monoxide under heating conditions of 200 ° C or more, but they are brought into contact with high-concentration carbon monoxide near normal temperature. In such a case, self-poisoning due to strong adsorption of carbon monoxide on the surface of the noble metal causes immediate deactivation.
- gold nanoparticle catalyst a catalyst in which gold nanoparticles are supported on an oxide surface
- Non-Patent Document 1 a catalyst in which gold nanoparticles are supported on an oxide surface
- Non-Patent Document 1 Sakurai, Tsubota, Haruta, Abstracts of the 91st Symposium on Catalysts A, 1P12 (2003), published in March 2003
- the present inventors have found that the catalyst life can be significantly improved by using an alkaline porous material mixed with a gold nanoparticle catalyst.
- the present inventors have filed a patent application 2002-355792 based on this finding.
- the tobacco combustion gas contains thousands or more of chemical components, such as sulfur compounds such as hydrogen sulfide, acidic compounds such as hydrogen cyanide, and the like.
- the major cause was considered to be the large number of compounds known to act as poisons for gold catalysts, even in trace amounts, such as chlorine-based compounds such as benzene.
- the present inventors have made it possible to improve the catalyst's ability to remove carbon monoxide for a long period of time by contacting the gas from which tobacco combustion gas has been previously treated with a filter to remove poisonous substances with a gold nanoparticle catalyst.
- the filter was searched with the intention of maintaining it for a long time (extending the service life).
- the alkali-impregnated activated carbon for adsorbing acidic gas which was the most effective as an alkali porous body in Japanese Patent Application No. 2002-355792, had the effect of being recognized as a filter. The effect was not always sufficient. After analyzing the gas composition after passing through the filter or after passing through the catalyst, and examining the correlation with the catalyst life, no correlation with the components specific to tobacco combustion gas was found. It has been found that the catalyst life is prolonged when the carbon dioxide is successfully removed.
- Carbon dioxide is always included in the combustion gas of organic matter in general, and usually exists in the air at about 300 to 500 ppm even in air. Since carbon dioxide is also a product of a carbon monoxide removal reaction by a gold nanoparticle catalyst, it is removed. When the concentration of carbon dioxide is high, a large amount is produced accordingly.
- the present invention effectively removes carbon dioxide and water from the gas to be treated, thereby effectively suppressing the deactivation of the gold nanoparticle catalyst and efficiently reducing carbon monoxide for a long period of time.
- the main purpose is to provide a method of removing the chemicals.
- the present inventor has conducted intensive studies to solve the above-mentioned problems.
- the gas to be treated (a gas containing carbon monoxide) was once treated with carbon dioxide and a water removing agent. It has been found that when brought into contact with a gold nanoparticle catalyst, the life of the catalyst can be significantly extended. In addition, it has been found that the catalyst life can be remarkably prolonged even when a gold nanoparticle catalyst, carbon dioxide, and a water removing agent are once mixed, and the gas to be treated is brought into contact with the mixture. Furthermore, they found that zeolite was most effectively used as a filter.
- the present invention provides the following carbon monoxide removal method.
- the gas to be treated is treated with a gold nanoparticle catalyst in which gold particles having an average particle diameter of 25 mm or less are supported on a metal oxide, and carbon dioxide and a water removing agent.
- a method for removing carbon monoxide from a gas to be treated is provided.
- Item 2 The method for removing carbon monoxide according to Item 1, wherein the gas to be treated is brought into contact with carbon dioxide and a water removing agent, and then the treated gas is brought into contact with a gold nanoparticle catalyst.
- Item 3 The method for removing carbon monoxide according to Item 1, wherein the gas to be treated is brought into contact with a mixture of a gold nanoparticle catalyst, carbon dioxide and a water removing agent.
- Item 4 The method for removing carbon monoxide according to any one of Items 1 to 3, wherein the carbon dioxide and water removing agent is a zeolite having a pore diameter of 0.4 nm or more.
- Item 5 The method for removing carbon monoxide according to any one of Items 1 to 4, wherein the temperature of the gold nanoparticle catalyst ranges from room temperature to about 100 ° C.
- Item 6 The method for removing carbon monoxide according to Item 5, further comprising irradiating the gold nanoparticle catalyst with light.
- a catalyst for removing carbon monoxide comprising a gold nanoparticle catalyst in which gold particles having an average particle size of 25 mm or less are supported on a metal oxide, and carbon dioxide and a water removing agent.
- Item 8 The item described in Item 7 in which the carbon dioxide and water removing agent is a zeolite having a pore diameter of 0.4 nm or more.
- Item 9 A filter containing the catalyst for removing carbon monoxide according to Item 7 or 8.
- Item 10 Granular, honeycomb, bead, or fibrous! Item 10.
- a gas mask for carbon monoxide comprising the filter according to item 12.
- the carbon monoxide removal catalyst of the present invention has a carbon dioxide and water removal agent
- the gold nanoparticles having a particle size of 25 nm or less contain a gold nanoparticle catalyst supported on a metal oxide, and have a form in which a carbon dioxide and water removing agent and the gold nanoparticle catalyst are used in combination for removing carbon monoxide. If it does, it is included in the carbon monoxide removal catalyst of the present invention regardless of whether or not both are mixed.
- the diacid carbon and water removing agent used in the present invention are not particularly limited as long as they have the ability to remove carbon dioxide and water.Compounds having the ability to remove both carbon dioxide and water (or the composition) ) And a combination of a compound (or composition) having the ability to remove carbon dioxide and a compound (or composition) having the ability to remove water.
- the removal of carbon dioxide and water may be any of a cooling method, a physical adsorbent method, a chemical removal method, and the like.
- a column is packed with packing material, and cooled to about -80 ° C is used as a carbon dioxide and water removing agent.
- carbon dioxide and water in the gas are condensed and removed at a low temperature.
- the filler include glass beads, glass wool, and quartz sand, but any material can be used without limitation. Do not block the column with condensate and use it.
- the packing is made of the following physical adsorbent, the removal efficiency can be further improved.
- the physical adsorbent method When the physical adsorbent method is employed, the physical adsorption phenomenon of carbon dioxide and water into a porous structure having a large surface area is used. For adsorbents with large amounts of carbon dioxide, Generally, the amount of adsorbed water is also large.
- the adsorbent may be in any form such as powder, fibrous, sponge, or honeycomb, regardless of the apparent form (macro structure) of the adsorbent. Specific examples include zeolite, billard clay, molecular sieving carbon, activated carbon, carbon black, silica, mesoporous silica, alumina, iron oxide, titanium oxide, and the like, and mixtures thereof. They can be used at room temperature without any need for cooling.
- zeolite which is an inorganic adsorbent having a micropore structure, has a large adsorption capacity for carbon dioxide and water in a wide concentration range and has a high adsorption speed, and is therefore the most preferred adsorbent. is there.
- Zeolites have different pore sizes depending on their crystal structure and exchangeable ions, and the sizes of molecules that can be adsorbed also differ.
- type A zeolite the type of exchange is changed to KA (K ion exchange type A zeolite), Na-A, Ca-A. Can be changed.
- KA K ion exchange type A zeolite
- Na-A Na-A
- Ca-A Ca-A
- molecular sieves 3A, 4A and 5A are commonly called molecular sieves 3A, 4A and 5A, respectively.
- Na-A, Ca-A and the like can adsorb both water and carbon dioxide, and thus can be used alone as the adsorbent of the present invention.
- K-A can adsorb and remove water, but cannot adsorb carbon dioxide. Therefore, K-A must be used in combination with other carbon dioxide scavengers.
- the carbon dioxide removing agent any of the removing agents described in this patent, such as Na-A, Ca-A described above, Na-X zeolite described below, and a chemical remover described below, may be used. May be.
- zeolite having a pore diameter of 0.4 nm or more is effectively used in order to complete the pretreatment filter of the gold catalyst in one step.
- Na_A and Ca-A described above are suitable.
- the pore size is not particularly limited as long as it is 0.4 nm or more.
- Na-X Na ion exchange X-type zeolite; commonly known as molecular sieve 13X
- molecular sieve 13X having a pore size of l.Onm may be used.
- Na-X Na ion exchange X-type zeolite; commonly known as molecular sieve 13X
- adsorption and removal of polar organic molecules having a relatively large molecular diameter such as nicotine are possible at the same time, and as a pre-filter, compared to the case where Na-A and Ca-A are used. Is highly effective! ,.
- the zeolite is not limited to those sold as "molecular sieve" described above.
- As the zeolite skeleton structure in addition to the above-mentioned A-type and X-type, Y-type, L-type, Any material having a pore size of 0.4 nm or more, such as ZSM-5, mordenite, offretite, freelite, clinoptilite, etc. may be used.
- the exchanged ion species is not particularly limited as long as it is a zeolite having an ion species that can be prepared by a normal ion exchange method.
- carbon dioxide which is a weakly acidic substance
- the basic substance for this purpose may be any substance having a large absorption capacity, irrespective of solid or liquid.
- the solid carbon dioxide absorbent include soda lime (JIS K8603 specifies a carbon dioxide absorption of 20 to 30% or more).
- the liquid absorbent include, for example, a diethanolamine solution, an aqueous solution of potassium carbonate and the like having a large absorption capacity.
- Specific examples of the above-described two-stage pretreatment filter include a K-A type zeolite (first stage).
- a pretreatment filter having a two-stage configuration can be used.
- the target gas contains various organic gas components. Therefore, a two-stage pretreatment filter that removes these with activated carbon and then passes through a carbon dioxide removing agent is used. This can prolong the life of the carbon dioxide removing agent.
- activated carbon is hydrophobic, the role of water removal is mainly borne by the second stage carbon dioxide remover at the same time.
- Such a two-stage pretreatment filter include activated carbon (first stage) + Na-X type zeolite (second stage), activated carbon (first stage) + Ca-A type zeolite (second stage), Activity Charcoal (first stage) + soda lime (second stage) can be exemplified.
- the gold nanoparticle catalyst used in the present invention is a catalyst having a structure in which gold particles are supported on a metal oxide carrier. Specifically, it is a catalyst having a structure in which nano-sized gold particles are uniformly supported on the surface of a metal oxide support.
- the average particle diameter of the gold particles is preferably about l to 10 nm, as long as the force is not less than the size of the gold atom and about 25 nm or less.
- the average particle size of the gold particles is a value measured by transmission electron microscopy.
- Examples of the metal oxide supporting the gold particles include zinc oxide, iron oxide, copper oxide, lanthanum oxide, titanium oxide, cobalt oxide, zirconium oxide, magnesium oxide, beryllium oxide, nickel oxide, chromium oxide, and the like.
- a metal oxide of a single metal selected from the group consisting of scandium oxide, cadmium oxide, indium oxide, tin oxide, manganese oxide, vanadium oxide, cerium oxide, aluminum oxide, and silicon oxide; zinc, iron, Group consisting of copper, lanthanum, titanium, konore, zirconium, magnesium, beryllium, nickel, chromium, scandium, cadmium, indium, tin, manganese, vanadium, cerium, aluminum, and silicon. And the like can be used.
- the above-described single metal metal oxide and composite oxide can be mixed and used as necessary.
- the content of gold in the gold nanoparticle catalyst is preferably from 0.1 to 30% by weight based on the total amount of the gold nanoparticle catalyst, from the viewpoint of catalytic activity per amount of gold used. It is preferred to be about 1 to 10% by weight.
- the form of the gold nanoparticle catalyst can be appropriately selected depending on the purpose of use, and examples thereof include powder, granule, pellet, and honeycomb. Among them, when it is used by mixing with carbon dioxide and a water removing agent, it is preferably in the form of a powder having a uniform mixing point. When the shape is a powder, the average particle size is about 0.05 to 1 mm, preferably about 0.05 to 0.2 mm.
- the specific surface area of the gold nanoparticle catalyst is usually about l to 800 m 2 / g as a value measured by the BET method. Degree, preferably about 5 to 300 m 2 / g.
- Starting materials include the following compounds.
- the gold precursor include compounds that are vaporized by heating, such as a water-soluble compound of gold (for example, chloroauric acid) and an acetyl acetonato complex (for example, a gold acetyl acetonato complex).
- Examples of the raw material of the metal oxide include nitrates, sulfates, acetates, chlorides and the like of various metals. Specific examples thereof include nitrates such as cerium nitrate and zirconium nitrate, sulfates such as titanium sulfate, and salted territories such as cerium chloride cerium, trichloride titanium, and tetrachloride titanium.
- the precipitate may be heat-treated in an oxygen atmosphere or a reducing gas in order to finally bring the gold into a metallic state.
- the term "under an oxygen atmosphere” refers to the atmosphere under air or a mixed gas obtained by diluting oxygen with nitrogen, helium, argon, or the like.
- the reducing gas for example, hydrogen gas of about 1 to about 0 vol% diluted with nitrogen gas, carbon monoxide gas, or the like can be used.
- the heat treatment temperature may be appropriately selected in the range of known reduction conditions, and is usually from room temperature to about 600 ° C. In order to obtain stable and fine gold particles, the temperature is preferably about 200 to 400 ° C.
- the heat treatment time is preferably, for example, about 1 to 12 hours.
- This gold nanoparticle catalyst can efficiently oxidize monoisocyanate carbon to diisocyanate carbon.
- the method for removing carbon monoxide of the present invention is carried out by treating the gas to be treated with a catalyst for removing carbon monoxide, that is, the above-mentioned gold nanoparticle catalyst, carbon dioxide and water removing agent.
- a catalyst for removing carbon monoxide that is, the above-mentioned gold nanoparticle catalyst, carbon dioxide and water removing agent.
- the gas to be treated may be brought into contact with a mixture of the two, or the gas to be treated may be a diacid. It may be brought into contact with a gold nanoparticle catalyst after being treated with a carbon fluoride and a water removing agent.
- the gold nanoparticle catalyst is mixed with carbon dioxide and a water removing agent
- a powdery gold nanoparticle catalyst and a powdery carbon dioxide and water removing agent are mixed by a known method.
- stirring and mixing may be performed using a mortar, a mixer, or the like.
- the content ratio of the gold nanoparticle catalyst to the carbon dioxide and water remover is arbitrarily good. It is preferable to use carbon dioxide and a water removing agent in an equivalent amount or more to the particle catalyst. Specifically, the weight ratio of the gold nanoparticle catalyst to the carbon dioxide and water removing agent may be about 1: 1 to 1: 100.
- a gas to be treated containing carbon monoxide, carbon dioxide and moisture for example, real air, synthetic air composed of oxygen and an inert gas, organic matter combustion gas, etc.
- a gas to be treated containing carbon monoxide, carbon dioxide and moisture for example, real air, synthetic air composed of oxygen and an inert gas, organic matter combustion gas, etc.
- the carbon dioxide generated by the reaction of dioxin carbon is included only in the amount contained in the air.
- various gas components are included in addition to this.
- the organic matter to be burned is not particularly limited, and may be, for example, anything such as tobacco, wood, plastic, and fuel.
- Essential gas components inert gas such as carbon monoxide, water vapor, oxygen, and nitrogen
- the method of the present invention is typically used when removing carbon monoxide from a gas having the composition (A) using a gold nanoparticle catalyst, whereby the gold nanoparticle is removed.
- the service life of the catalyst can be extended.
- the effect is also exhibited when the components (B) and (C) are added.
- the concentration of carbon monoxide in the gas to be treated is not more than the chemical reaction equivalent (40% for 20% oxygen) with respect to the oxygen concentration in the gas (about 20% in the case of air). good.
- the concentrations of carbon dioxide and water vapor in the gas are not particularly limited. As long as the water vapor does not condense at the operating temperature, the amount of water vapor should be within the range.
- the temperature condition of the catalytic reaction can be appropriately selected according to the type of the catalyst, the concentration of carbon monoxide in the gas, and the like, but the temperature at which the gold nanoparticle catalyst can stably perform the carbon monoxide removal reaction can be selected.
- the temperature range is about -70 to 350 ° C, and since the accumulation of carbon dioxide and water vapor components on the catalyst surface can be a problem at 150 ° C or less, the present invention has a temperature range of -70 to 150 ° C. It is valid in the range.
- the gold nanoparticle catalyst can be operated at room temperature (for example, about 10 to 30 ° C, the same applies hereinafter). In this case, since heating is not required, energy consumption can be reduced when used as a carbon monoxide removing device or the like. On the other hand, when the gold nanoparticle catalyst is heated, energy for the heating is required. However, adsorption of carbon dioxide and water on the surface of the gold nanoparticle catalyst is less likely to occur. The life of the catalyst can be significantly extended in combination with the effect of the catalyst.
- a suitable temperature range for the gold nanoparticle catalyst is from room temperature to about 100 ° C, preferably from room temperature to about 80 ° C.
- the operating temperatures of the carbon dioxide and the water removing agent are naturally the same as the catalyst temperature.
- the temperatures of the carbon dioxide and water removing agent and the gold nanoparticle catalyst can be set separately. For example, after pretreatment of the gas with carbon dioxide and a water removing agent (eg, zeolite) at room temperature, and then passing it through a gold nanoparticle catalyst heated to 50 to 100 ° C, both processes can be performed at room temperature. In comparison with the above, the effect is obtained.
- a water removing agent eg, zeolite
- the diacid carbon and the water removing agent are saturated and lose their removal ability, they are mixed with the catalyst! If not, only the diacid carbon and the water removing agent are replaced or regenerated. By doing, the catalyst The effect can last.
- the regeneration method there can be used methods such as the flow of an inert gas, the flow of air (which is more purified than the gas to be treated), reduced pressure, heating, washing and drying. It is regeneration, and can be regenerated by heating to about 50 to 700 ° C. For the purpose of heating and removing only carbon dioxide and water, the purpose can be achieved by heating at 50 to 250 ° C.
- the gold nanoparticle catalyst Since the concentrations of carbon dioxide and water after passing through the carbon dioxide and water removing agent are not completely zero, the gold nanoparticle catalyst has a longer (compared to the case where the carbon dioxide and water removing agent is not used). It takes time) and loses its activity. The gold nanoparticle catalyst that has lost its removal ability can be regenerated by heat treatment.
- the gold nanoparticle catalyst deactivated by direct treatment with tobacco combustion gas adsorbs various poisons such as nicotine in addition to carbon dioxide and water. A heating temperature of about 350 ° C is required to return to normal temperature.However, most of polar organic molecules with a relatively large molecular diameter such as nicotine are adsorbed and removed using Na-X type zeolite etc. as a pre-filter. When the catalyst reaches the catalyst by heating, the adsorbed material at the time of deactivation of the catalyst is substantially only carbon dioxide and water, and the temperature of heating and regeneration can be reduced to about 50 to 250 ° C.
- the method for removing carbon monoxide using the catalyst of the present invention is carried out in the above temperature range using a gold nanoparticle catalyst as a "heat" catalyst (meaning that it is not a photocatalyst). Alternatively, it may be performed under light irradiation conditions as described below.
- the oxidation reaction of carbon monoxide can be promoted as compared with the case of non-irradiation. Further, when the activity of the gold nanoparticle catalyst is reduced by contaminants present in the air, the catalyst can be regenerated by irradiating light. In other words, an oxidation reaction promoting effect can be expected while the gold nanoparticle catalyst is in contact with the carbon monoxide gas, and a catalyst regenerating effect by light irradiation can be exhibited during the other period. Therefore, when the gold nanoparticle catalyst is irradiated with light, the carbon monoxide contacts the catalyst surface intermittently or continuously! Thus, a high carbon monoxide removal effect can be maintained.
- the wavelength of the light to be applied may be set as appropriate depending mainly on whether the effect of promoting the carbon monoxide oxidation reaction is expected or the effect of regenerating the catalyst is expected. Usually, about l ⁇ 1000nm, better More preferably, by using light in a wavelength range of about 200 to 700 nm, both effects of promoting and regenerating the reaction of the gold nanoparticle catalyst can be obtained.
- any gold nanoparticle catalyst containing a metal oxide having the above-described composition can be used.
- the metal of the metal oxide component of the gold nanoparticle catalyst titanium, alumina, silica, zirconia, zinc oxide, ceria, manganese oxide, magnesia, and the like are preferable. Guchi Nita, alumina, silica, etc. are more preferred.
- the catalyst for removing carbon monoxide of the present invention is widely used as a filter (for example, an air purification filter).
- a filter for example, an air purification filter
- the catalyst for removing carbon monoxide of the present invention may be in any form of granular, honeycomb, bead, or fiber, depending on the use. Good. These types of filters can be manufactured using a known method.
- the above-described air purifying filter can also be used as a member of an air purifier.
- the air purifier may be provided with, for example, a particle removal filter, the above-described air purification filter, and, if necessary, a light source required for light irradiation. Any light source may be used as long as it has a light wavelength capable of promoting the acid reaction of carbon monoxide.For example, natural light, high-pressure mercury lamp, low-pressure mercury lamp, black light, excimer laser, deuterium lamp, A xenon lamp or the like can be used.
- the above air purification filter 1 can also be used as a gas mask for carbon dioxide.
- the gas to be treated is brought into contact with the mixture of carbon dioxide and the catalyst for removing water and the gold nanoparticle catalyst.
- the gas to be treated may be arranged so as to contact the carbon nanoparticle catalyst after the gas to be treated comes into contact with the carbon nanoparticle and the water removing agent.
- the gold nanoparticle catalyst has a reduced ability to remove carbon dioxide by contact with various poisoning substances including carbon dioxide and water vapor in the organic combustion gas. According to the above, the effects of carbon dioxide and water are eliminated to prolong the activity of the gold nanoparticle catalyst. Can be maintained at a high level over a long period of time.
- the method for removing carbon monoxide according to the present invention is extremely useful in a wide field requiring the removal of carbon monoxide. More specifically, for example, an air purification mechanism for an air conditioner (air purifier, air conditioner, smoke separator, etc.) in a room, an automobile, and the like; incomplete combustion gas from a heating device, a boiler, etc. Iridani carbon removal filter, gas filter for gas mask used in gas masks; Idani carbon removal filter mechanism for raw gas power used in iDanigaku factories, etc .; Hydrogen production by fuel reforming process for fuel cells It is extremely useful as a filter mechanism for removing carbon monoxide in the process.
- an air purification mechanism for an air conditioner air purifier, air conditioner, smoke separator, etc.
- Iridani carbon removal filter gas filter for gas mask used in gas masks
- Idani carbon removal filter mechanism for raw gas power used in iDanigaku factories, etc .
- Hydrogen production by fuel reforming process for fuel cells It is extremely useful as a filter mechanism for
- FIG. 1 is a schematic diagram showing an outline of a catalyst life evaluation device.
- FIG. 2 is a graph showing changes over time in the concentration of carbon monoxide and the concentration of carbon dioxide in the reaction of Example 1.
- FIG. 3 is a graph showing the time change of the concentration of carbon monoxide and the concentration of carbon dioxide in the reaction of Comparative Example 1.
- Fig. 4 is a schematic diagram showing an outline of a catalyst life evaluation device using tobacco combustion gas.
- FIG. 5 is a graph showing the change over time in the concentration of carbon dioxide in the reactions of Example 8, Comparative Examples 12 and 13.
- the gold nanoparticle titanium oxide catalyst prepared by the following method (1) was commonly used, and the catalyst life was evaluated by the method shown in (2).
- the mixture was heated and the pH was adjusted to 7 by dropwise addition of an aqueous NaOH solution. To this, 3.Og of titanium oxide powder was added, and the mixture was stirred at 70 ° C for 1 hour. Thereafter, the mixture was cooled to room temperature, the precipitate was sufficiently washed with distilled water, dried, and calcined in air at 400 ° C. for 4 hours to obtain a gold-Z titanium oxide catalyst (Au / TiO 3, gold loading 3 wt. %]. The obtained gold nanoparticle catalyst is used until just before use. The bottle was sealed and stored.
- a catalyst life test was performed using the apparatus shown in FIG.
- the sample gas in the Tedrabak is introduced into the catalytic reaction tube after passing through filter columns 1 and 2 (only one type of adsorbent is used, or only filter column 1 in the case of using only one type of adsorbent) filled with adsorbent in the ram .
- the outlet of the catalyst reaction tube was connected to the suction port of the suction pump so that the gas in the teddy bag was sucked.
- the suction pump used (GL Science SP208) automatically adjusts the suction force according to the pressure loss, so that the flow rate can be kept constant regardless of the state of filling of the adsorbent or catalyst powder in the filter.
- a carbon monoxide gas sensor and a carbon dioxide concentration meter were connected to the outlet of the catalyst reaction tube to measure the concentration.
- a catalyst a mixture of 15 mg or 67 mg of gold or titanium oxide prepared in (1) and 500 mg of quartz sand was filled into a quartz reaction tube having an inner diameter of 6 mm for use.
- a cock is set so that the gas first passes through the adsorbent filter but does not pass through the catalyst reaction tube (bypass), and the suction pump is operated to flow the gas at 200 mL / min. 7 through.
- Na-X-type zeolite (Molecular sieve 13X, 1/16 pellet, manufactured by Kishidai-Dogaku Co., Ltd.) stored in a reagent bottle as a diacid carbon and water removing agent in the filter column of Fig. 1 was filled in a volume of 50 mL, and the catalyst reaction tube was filled with 15 mg of the gold / zinc titanium oxide catalyst powder stored in the screw bottle, diluted with quartz sand to make a total amount of 500 mg.
- quartz sand since a small amount of catalyst was used under the accelerated test conditions, a gap was formed in the reaction tube, and the gas did not pass through! Using quartz sand as a diluent! / Puru.
- the catalyst life test was performed according to the above-mentioned procedure without heating pretreatment even for the V ⁇ deviation between the carbon dioxide and water remover and the catalyst. The reaction results are shown in FIG. 2 and Table 1.
- the carbon monoxide concentration which was 1025 ppm before the start of the reaction, decreases to about 230 ppm immediately after the start of the reaction, but thereafter gradually increases.
- the number of carbon conversion (C) at the time t in Table 1 was calculated as follows.
- the concentration of carbon dioxide was 1130 ppm or less, which was much lower than the test gas concentration of 7200 ppm. This indicates that the carbon dioxide originally contained in the test gas other than the carbon dioxide generated by the catalytic reaction is almost completely absorbed and removed by the Na-X type zeolite.
- the catalyst life (Ta) is the time until the concentration of carbon monoxide returns to the concentration before the start of the reaction (monoxide concentration). The time until the carbon conversion rate becomes zero). In this example, even after the measurement for 25 minutes, the carbon monoxide conversion ratio was zero. However, in FIG. 1, the carbon monoxide concentration increased linearly after the reaction time of 10 minutes. The catalyst life (105 minutes) was predicted from the time required to reach this initial CO concentration [CO] by extending this line.
- Tn (days) Ta (min) X (Fa / Fn) / (60 X 24)
- Fa is the flow rate of carbon monoxide per weight of the gold-Z titanium oxide catalyst in the accelerated test
- [CO] is the initial concentration of carbon monoxide in the accelerated test
- Fn is the flow rate of carbon monoxide per unit weight of titanium oxide catalyst under normal reaction conditions (non-accelerated conditions). The calculation is based on the amount of catalyst, total gas flow rate, and initial carbon monoxide concentration (assuming 50 PP m).
- a catalyst life test was performed without using a prefilter. More specifically, in the apparatus shown in Fig. 1, the three-way coke of the filter column was switched so that the gas binocularized the filter, and the catalytic reaction tube contained gold Z oxide stored in a screw bottle. 15 mg of titanium catalyst powder was diluted with quartz sand, and filled to a total amount of 500 mg. The catalyst life test was performed according to the above-mentioned procedure without performing the heating pretreatment of the catalyst.
- the reaction results are shown in Fig. 3 and Table 1.
- an ashtray and a fan for air stirring were installed in an acrylic desiccator with an internal volume of 12 L.
- Two opening / closing cocks were attached to the desiccator, one of which was a tapako combustion gas outlet so that it could be sucked by a sucking I pump (SP208 made by GL Sciences).
- the other cock was used as an air inlet for keeping air at a normal pressure by injecting air into the desiccator during suction by the metering pump.
- a two-stage quartz filter paper filter (Whatman quartz fiber filter paper, type QMA) for removing particulate matter was installed. After passing through the filter, the gas pipe was connected to the inlet of the pump, and the outlet was connected to a 10-liter tedlar bag as a bag for collecting gas.
- the procedure for preparing tobacco combustion gas was performed as follows.
- One cigarette (trade name: Mild Seven, manufactured by Japan Tobacco Inc.) was ignited, placed in an ashtray, the desiccator lid was closed, and the cigarette was left for about 8 minutes until one cigarette was burned.
- two cocks were opened and the suction pump was operated at 500 mL / min for 10 minutes to collect 5 L of tobacco gas in a 10 L Tedlar bag.
- the connection between the paper filter and the sampling pump was disconnected, the suction port of the sampling pump was opened to the atmosphere, the system was operated again at 500 mL / min for 10 minutes, and 5 L of room air was added during the teddy bag.
- 10 L of tobacco combustion gas was prepared in a 10 L teddra bag.
- the average concentration of carbon dioxide in the tobacco prepared by this method was 1100-1300 ppm, and the concentration of carbon dioxide was 6000-7000 ppm.
- the finoletter column of FIG. 1 was filled with 100 mL of Na-X type zeolite, and the catalytic reaction tube was filled with 15 mg of gold / titanium oxide powder diluted with quartz sand to make a total amount of 500 mg.
- a tanoko combustion gas prepared by the above-described method was set in the Tedla bag. The catalyst life test was performed according to the above-mentioned procedure without any pre-heating treatment even for the difference between the zeolite and the catalyst.
- the catalyst life test was performed in the same manner as in Example 2 except that the filling amount of the Na-X type zeolite in the filter column was 50 mL.
- Example 5 The filter column was filled with 100 mL of Ca-A type zeolite, and a catalyst life test was performed in the same manner as in Example 2. [0099] Example 5
- the first stage of the filter column was filled with 50 mL of activated carbon (G2x manufactured by Nippon Environmental Chemicals Co., Ltd.), and the second stage was filled with 50 mL of Na-X type zeolite.
- a catalyst life test was performed in the same manner as in Example 2.
- the first stage of the filter column was filled with 50 mL of activated carbon (G2x manufactured by Nippon Environmental Chemicals Co., Ltd.), and the second stage was filled with 50 mL of Ca-A type zeolite, and a catalyst life test was performed in the same manner as in Example 2.
- the first stage of the filter column is filled with 50 mL of activated carbon (G2x made by Nippon Environmental Chemicals Co., Ltd.), and the second stage is filled with 50 mL of soda lime (Soda lime, granular, No. 1 made by Kishidai-Dogaku Co., Ltd.).
- a catalyst life test was performed in the same manner as in Example 2.
- the filter column was filled with 100 mL of activated carbon (G2x, manufactured by Nippon Environmental Chemicals Co., Ltd.), and a catalyst life test was performed in the same manner as in Example 2.
- G2x activated carbon
- a filter column was filled with 50 mL of activated carbon (G2x, manufactured by Nippon Environmental Chemicals Co., Ltd.), and a catalyst life test was performed in the same manner as in Example 2.
- G2x activated carbon
- the filter column was filled with 100 mL of activated carbon for removing sulfur-based neutral gas components (GS2x manufactured by Nippon Environmental Chemicals Co., Ltd.), and a catalyst life test was performed in the same manner as in Example 2.
- GS2x sulfur-based neutral gas components manufactured by Nippon Environmental Chemicals Co., Ltd.
- the filter column was filled with lOOmL of activated carbon for removing acidic gas components (GH2x manufactured by Nippon Environmental Chemicals Co., Ltd.) in the presence of ammonia, and a catalyst life test was carried out in the same manner as in Example 2.
- GH2x manufactured by Nippon Environmental Chemicals Co., Ltd.
- the filter column was filled with 100 mL of activated carbon for simultaneous removal of acidic and basic gas components (GM2x manufactured by Nippon Environmental Chemicals Co., Ltd.) and subjected to a catalyst life test in the same manner as in Example 2.
- GM2x manufactured by Nippon Environmental Chemicals Co., Ltd.
- Comparative Example 7 Activated carbon for removing aldehyde gas components (manufactured by Nippon Environmental Chemicals Co., Ltd.)
- the filter column was filled with 100 mL of activated carbon for removing an acidic gas component (GSlx manufactured by Nippon Environmental Chemicals Co., Ltd.), and a catalyst life test was performed in the same manner as in Example 2.
- an acidic gas component GSlx manufactured by Nippon Environmental Chemicals Co., Ltd.
- the filter column was filled with 100 mL of activated carbon for removing basic gas components (GTsx manufactured by Nippon Environmental Chemicals Co., Ltd.), and a catalyst life test was performed in the same manner as in Example 2.
- GTsx manufactured by Nippon Environmental Chemicals Co., Ltd.
- the filter column was filled with 100 mL of K-A type zeolite (Molecular sieve 3A, 1/16 pellet, manufactured by Kishidai Dangaku Co., Ltd.), and a catalyst life test was carried out in the same manner as in Example 2.
- K-A type zeolite Molecular sieve 3A, 1/16 pellet, manufactured by Kishidai Dangaku Co., Ltd.
- a catalyst life test was performed in the same manner as in Example 2 under the condition that the sample gas was in direct contact with the catalyst, bypassing the filter column.
- activated carbon and impregnated activated carbon were used as filters (Comparative Examples 2 to 9).
- V the displacement is longer than in the case without the filter.
- the force Ta is longer than 100 minutes.
- the first stage was made of activated carbon and the second stage was made of Ca-A type or Na-X type zeolite.
- a longer life was obtained than the sum of the obtained catalyst lives. This is thought to be because the burden on zeolite can be reduced by removing organic poisons and the like with activated carbon and treating mosquito with zeolite.
- the test gas was room air containing 10,000 ppm of carbon monoxide in accordance with the provisions of rjIS T 8152 Gas Mask. Using a suction pump (GL Science, SP208), apply 10 L of indoor air Collected during Rabac. Here, pure monoxide was injected using a gas-tight syringe so that the concentration of carbon monoxide was about 10,000 ppm, and set in the apparatus shown in FIG.
- test gas does not pass through both the filter column and the catalyst reaction tube in Fig. 1 (by setting a bypass cock, operating the suction pump to allow the test gas to flow at 200 mL / min. After the concentration of the carbon dioxide measured by the carbon dioxide sensor was stabilized, the cock of the catalyst reaction tube was switched so that the test gas passed through the catalyst, and the reaction was started.
- test conditions 67 mg of zirconia titanium oxide and 500 mg of Na-X type zeolite were used as catalysts for a sample gas flow rate of 200 mL / min.
- test gas is passed under the condition of 30 L / min! /, So the flow rate is 150 times that of this embodiment.
- the conditions of this embodiment are as follows: sample gas flow rate 30 L / min, amount of titanium oxide catalyst used 10 g, Na-X This is equivalent to conducting a test according to JIS T 8152 under the condition of “type zeolite usage 75 g” at a small scale of 1/150.
- the force required to maintain the outlet concentration of 50 ppm or less for 30 minutes or more is equivalent to conducting a test according to JIS T 8152 under the condition of “type zeolite usage 75 g” at a small scale of 1/150.
- Comparative Example 12 A test was performed using only the Zinc titanium oxide catalyst without using the Na-X type zeolite according to the following procedure. 67 mg of gold Z titanium oxide powder stored in a screw bottle was mixed with 500 mg of quartz sand, and filled in a catalytic reaction tube. A catalyst pretreatment was performed in the same manner as in Example 8, the reaction tube was set in the apparatus shown in FIG. 1, and a catalyst life test was performed under the same conditions as in Example 8.
- Figure 5 shows the reaction results. 3 minutes after the start of the reaction, the concentration of carbon monoxide drops to 50 ppm. Since the concentration of carbon monoxide immediately starts to increase, the required holding time of 50 ppm or less cannot be secured.
- zeolites such as Na-X type zeolites also have the ability to adsorb iodide carbon.
- 500 mg of Na-X type zeolite ground to a particle size of 12 to 30 mesh was filled in the catalyst reaction tube.
- a test was performed under the same conditions as in Example 8. The reaction results are shown in FIG. Within 1 minute after the start of the test, only a slight decrease in concentration due to adsorption of carbon monoxide was observed. Under these conditions, the use of only the Na-X type zeolite shows almost no ability to remove carbon monoxide compared to Example 8.
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Abstract
Description
Claims
Priority Applications (3)
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CA2575482A CA2575482C (en) | 2004-06-08 | 2005-05-17 | Catalyst for carbon monoxide removal and method of removing carbon monoxide with the catalyst |
US11/628,799 US20080008639A1 (en) | 2004-06-08 | 2005-05-17 | Catalyst for Carbon Monoxide Removal and Method of Removing Carbon Monoxide With the Catalyst |
JP2006514431A JP4431700B2 (ja) | 2004-06-08 | 2005-05-17 | 一酸化炭素除去用触媒及び該触媒を用いた一酸化炭素除去方法 |
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US (1) | US20080008639A1 (ja) |
JP (1) | JP4431700B2 (ja) |
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- 2005-05-17 JP JP2006514431A patent/JP4431700B2/ja not_active Expired - Fee Related
- 2005-05-17 CA CA2575482A patent/CA2575482C/en not_active Expired - Fee Related
- 2005-05-17 WO PCT/JP2005/008948 patent/WO2005120686A1/ja active Application Filing
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JP2007222863A (ja) * | 2005-03-31 | 2007-09-06 | Daikin Ind Ltd | 一酸化炭素除去材料、一酸化炭素除去装置、一酸化炭素除去部材、及び一酸化炭素除去部材の製造方法 |
JP2008049280A (ja) * | 2006-08-25 | 2008-03-06 | National Institute Of Advanced Industrial & Technology | 貴金属ナノ粒子担持金属酸化物触媒を用いた低温酸化反応の促進方法 |
JP2014073956A (ja) * | 2007-05-07 | 2014-04-24 | Honjo Chemical Corp | 気相中の一酸化炭素を二酸化炭素に光酸化する方法 |
JP2008280184A (ja) * | 2007-05-08 | 2008-11-20 | National Institute Of Advanced Industrial & Technology | セリウムを含有するメソポーラスシリカと貴金属の超微粒子の複合体、その複合体の製造方法、並びにその複合体を触媒に用いた微量一酸化炭素の酸化的除去方法及びアルコール類の酸化的脱水素反応によるケトン類の合成方法 |
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JP5657396B2 (ja) * | 2009-02-04 | 2015-01-21 | リケンテクノス株式会社 | 樹脂組成物からなる成形体 |
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JP2018027540A (ja) * | 2010-05-07 | 2018-02-22 | シーピーピーイー カーボン プロセス アンド プラント エンジニアリング エス.エー. | 排ガスから二酸化炭素および二酸化硫黄を触媒除去する方法 |
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Also Published As
Publication number | Publication date |
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CA2575482A1 (en) | 2005-12-22 |
CA2575482C (en) | 2011-01-18 |
JPWO2005120686A1 (ja) | 2008-04-03 |
US20080008639A1 (en) | 2008-01-10 |
JP4431700B2 (ja) | 2010-03-17 |
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