WO2013125437A1 - 硫化カルボニルおよびシアン化水素の加水分解用触媒ならびに酸化チタン系組成物の使用 - Google Patents
硫化カルボニルおよびシアン化水素の加水分解用触媒ならびに酸化チタン系組成物の使用 Download PDFInfo
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- WO2013125437A1 WO2013125437A1 PCT/JP2013/053524 JP2013053524W WO2013125437A1 WO 2013125437 A1 WO2013125437 A1 WO 2013125437A1 JP 2013053524 W JP2013053524 W JP 2013053524W WO 2013125437 A1 WO2013125437 A1 WO 2013125437A1
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- Prior art keywords
- titanium oxide
- catalyst
- oxide
- hydrolysis
- carrier
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 70
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 title claims abstract description 68
- JJWKPURADFRFRB-UHFFFAOYSA-N carbonyl sulfide Chemical compound O=C=S JJWKPURADFRFRB-UHFFFAOYSA-N 0.000 title claims abstract description 58
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 239000003054 catalyst Substances 0.000 title claims abstract description 54
- 239000000203 mixture Substances 0.000 title claims abstract description 28
- 238000006460 hydrolysis reaction Methods 0.000 title claims abstract description 27
- 230000007062 hydrolysis Effects 0.000 title claims abstract description 20
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims abstract description 15
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 14
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052707 ruthenium Inorganic materials 0.000 claims abstract description 8
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052788 barium Inorganic materials 0.000 claims abstract description 7
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000010941 cobalt Substances 0.000 claims abstract description 7
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 7
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 7
- 239000011733 molybdenum Substances 0.000 claims abstract description 7
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 7
- 239000002131 composite material Substances 0.000 claims description 23
- 239000004480 active ingredient Substances 0.000 claims description 11
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 claims description 5
- 229940010552 ammonium molybdate Drugs 0.000 claims description 5
- 235000018660 ammonium molybdate Nutrition 0.000 claims description 5
- 239000011609 ammonium molybdate Substances 0.000 claims description 5
- 229910000008 nickel(II) carbonate Inorganic materials 0.000 claims description 5
- ZULUUIKRFGGGTL-UHFFFAOYSA-L nickel(ii) carbonate Chemical compound [Ni+2].[O-]C([O-])=O ZULUUIKRFGGGTL-UHFFFAOYSA-L 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 229910021446 cobalt carbonate Inorganic materials 0.000 claims description 4
- ZOTKGJBKKKVBJZ-UHFFFAOYSA-L cobalt(2+);carbonate Chemical compound [Co+2].[O-]C([O-])=O ZOTKGJBKKKVBJZ-UHFFFAOYSA-L 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 4
- GTCKPGDAPXUISX-UHFFFAOYSA-N ruthenium(3+);trinitrate Chemical compound [Ru+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O GTCKPGDAPXUISX-UHFFFAOYSA-N 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 4
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 4
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 claims description 3
- 230000003301 hydrolyzing effect Effects 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 abstract description 8
- 239000003245 coal Substances 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 11
- 239000007789 gas Substances 0.000 description 11
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 239000000047 product Substances 0.000 description 10
- 238000002309 gasification Methods 0.000 description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 5
- 239000004014 plasticizer Substances 0.000 description 5
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 4
- 235000011114 ammonium hydroxide Nutrition 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 238000007670 refining Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 2
- 229920002301 cellulose acetate Polymers 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001960 metal nitrate Inorganic materials 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910000476 molybdenum oxide Inorganic materials 0.000 description 2
- 229910000480 nickel oxide Inorganic materials 0.000 description 2
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 description 2
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- -1 alkaline earth metal sulfate Chemical class 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000007809 chemical reaction catalyst Substances 0.000 description 1
- 229910000428 cobalt oxide Inorganic materials 0.000 description 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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Definitions
- the present invention relates to the use of a catalyst for hydrolysis of carbonyl sulfide and hydrogen cyanide, and a titanium oxide-based composition.
- the coal gasified gas contains carbonyl sulfide (COS) and hydrogen cyanide (HCN) that cause air pollution, it is important to remove these compounds in the gas purification process.
- the coal gasification gas refining process is performed by gasifying coal in the gasification furnace 4 and introducing the gas dedusted by the dust removal device 5 into the COS conversion device 6.
- An example is a process configuration in which the COS contained therein is converted into carbon dioxide (CO 2 ) and hydrogen sulfide (H 2 S), and then these are recovered by the H 2 S / CO 2 recovery device 7.
- the gas purified in this way is then used for chemical synthesis 8, power generation 9, and the like.
- refined gas obtained by gasifying and purifying coal has been proposed for use in synthesis of chemical products such as methanol and ammonia, or for direct power generation.
- Examples include a power generation (Integrated coal. Gasification Combination Cycle: IGCC) system (for example, Patent Document 1). Specifically, this is a system in which coal is converted into a combustible gas in a high-temperature and high-pressure gasification furnace, and the gasification gas is used as fuel to generate power by combining a gas turbine and a steam turbine.
- IGCC Integrated coal. Gasification Combination Cycle
- the conversion of COS is based on the hydrolysis reaction shown in the following formula 1.
- Examples of the hydrolysis catalyst include a catalyst in which a metal carbonate is supported on titanium oxide (Patent Document 2).
- HCN can be recovered by converting it into ammonia (NH 3 ) by the hydrolysis reaction of the following formula 2 or the reaction of formula 3.
- the catalyst for hydrolysis of HCN include a titanium oxide-based composition containing a combination of titanium oxide and an alkaline earth metal sulfate and a doping compound (Patent Document 3).
- the inventor has reviewed the reaction mechanism and reaction catalyst of these hydrolysis reactions, paying attention to the conversion process of COS and HCN. As a result, the present inventors have found that COS and HCN can be simultaneously removed at a high decomposition rate by highly dispersing and supporting an active ingredient mainly composed of a predetermined metal on a titanium oxide-based carrier having excellent corrosion resistance. It came to be completed.
- the first embodiment according to the present invention is a catalyst for hydrolysis of carbonyl sulfide and hydrogen cyanide, and contains at least one metal selected from the group consisting of barium, nickel, ruthenium, cobalt, and molybdenum as a main component. And a titanium oxide-based carrier supporting the active ingredient.
- the second aspect of the present invention is the use of a titanium oxide-based composition as a catalyst for hydrolyzing carbonyl sulfide and hydrogen cyanide, wherein the composition comprises barium, nickel, ruthenium, cobalt, and molybdenum.
- a titanium oxide-based composition comprising at least an active ingredient whose main component is at least one metal selected from the group and a titanium oxide-based carrier supporting the active ingredient.
- the use of the catalyst for hydrolysis of carbonyl sulfide and hydrogen cyanide and the titanium oxide-based composition of the present invention makes it possible to simultaneously remove COS and HCN at a high decomposition rate.
- the catalyst of the present invention is a catalyst for hydrolysis of carbonyl sulfide and hydrogen cyanide, and contains an active component mainly composed of at least one metal selected from the group consisting of barium, nickel, ruthenium, cobalt, and molybdenum. Including at least.
- the main component may be a combination of the above metals, and the supported amount is 0.1 to 25% by mass, more preferably 5 to 22% by mass.
- the catalyst of the present invention includes a titanium oxide-based carrier that supports the active component.
- the titanium oxide-based carrier include titanium oxide and composite oxides of titanium oxide and other oxides. With such a carrier, the active ingredient can be reliably fixed, and since it is chemically stable under the conditions of use of the catalyst, it does not hinder the action of the catalyst.
- the use of the present invention is the use of a titanium oxide-based composition as a catalyst for hydrolyzing carbonyl sulfide and hydrogen cyanide.
- the titanium oxide-based composition includes at least an active component mainly composed of at least one metal selected from the group consisting of barium, nickel, ruthenium, cobalt, and molybdenum. Further, a titanium oxide-based carrier that carries the active ingredient is included.
- the supported amount of the main component is 0.1 to 25% by mass, more preferably 5 to 22% by mass, and titanium oxide or a composite of titanium oxide and other oxides is used as the titanium oxide carrier. Oxides and the like are mentioned for the same reason as described above.
- the catalyst of the present invention and the titanium oxide composition in use add at least one metal salt selected from the group consisting of barium carbonate, nickel carbonate, ruthenium nitrate, cobalt carbonate, and ammonium molybdate to the titanium oxide support. It is preferable that This is because it is stable as a raw material.
- titanium oxide can be used as the titanium oxide support.
- titanium oxide it is more preferable to use an anatase type crystal structure titanium oxide having a large specific surface area because the amount of active component supported increases and the catalytic activity is improved.
- a titanium oxide composite oxide can be used as the titanium oxide support in addition to the titanium oxide.
- the specific surface area is increased and the heat resistance is also improved.
- the titanium oxide-based composite oxide include at least one selected from the group consisting of a composite oxide of titanium oxide and silicon oxide, a composite oxide of titanium oxide and aluminum oxide, and a composite oxide of titanium oxide and zirconium oxide. It is done.
- the composite ratio of the titanium oxide and the metal oxide composite is preferably 1:99 to 99: 1, and particularly preferably in the range of 50:50 to 95: 5. This is because the specific surface area where the active ingredient is supported can be increased.
- the catalyst of the present invention and the titanium oxide composition in use are preferably in the form of a honeycomb. This is because clogging and pressure loss of the catalyst and the titanium oxide-based composition can be prevented and the catalyst can be maintained in a highly active state even in a situation where dust and the like coexist.
- the catalyst of the present invention and the titanium oxide composition in use are, for example, any one of the above metal salts added to a titanium oxide carrier powder, kneaded with a binder and a plasticizer, and appropriately spherical or pellet-shaped, honeycomb It can be formed into a shape, dried and fired.
- the carrier is a titanium oxide composite oxide
- Example 1 Barium carbonate (special grade reagent made by Hayashi Junyaku) is added to 100 parts by mass of anatase-type titanium oxide powder (CSP-003 manufactured by JGC Catalysts & Chemicals Co., Ltd.) so that it becomes 4 parts by mass in terms of barium oxide. 5% by mass of aqueous ammonia was added and kneader kneading was performed for 60 minutes.
- CSP-003 anatase-type titanium oxide powder manufactured by JGC Catalysts & Chemicals Co., Ltd.
- Example 2 A honeycomb catalyst was obtained in the same manner as in Example 1, except that nickel carbonate (special grade reagent manufactured by Hayashi Junyaku) was added in place of barium carbonate so as to be 4 parts by mass in terms of nickel oxide.
- nickel carbonate special grade reagent manufactured by Hayashi Junyaku
- Example 3 A honeycomb catalyst was obtained in the same manner as in Example 1, except that 0.1 part by mass of ruthenium nitrate (Ru amount 50 g / L, manufactured by Tanaka Kikinzoku Kogyo Co., Ltd.) was added in place of barium carbonate in terms of ruthenium. .
- Example 4 The same as Example 1 except that nickel carbonate is converted to nickel oxide instead of barium carbonate and 4 parts by mass and ammonium molybdate (special grade manufactured by Hayashi Pure Chemical Co., Ltd.) is converted to molybdenum oxide and 10 parts by mass are added. By this method, a honeycomb catalyst was obtained.
- Example 5 The same as in Example 1 except that cobalt carbonate (special grade manufactured by Hayashi Junyaku Co.) is converted to cobalt oxide instead of barium carbonate and 5 parts by mass and ammonium molybdate is converted to molybdenum oxide and 10 parts by mass are added. By this method, a honeycomb catalyst was obtained.
- cobalt carbonate special grade manufactured by Hayashi Junyaku Co.
- Example 6 1125.8 g of Ti source Ti (Oi—C 3 H 7 ) 4 and 57.6 g of Si (OC 2 H 5 ) 4 were mixed, added to 15000 g of water at 80 ° C., and hydrolyzed. The mixture was aged by stirring in water at the same temperature for a time. The product obtained after aging was filtered and washed thoroughly, followed by drying and firing (5 hours at 500 ° C.), except that a composite oxide of titanium oxide and silicon oxide was used as a carrier. A honeycomb catalyst was obtained in the same manner as in Example 1.
- Example 7 Except that the composite oxide of titanium oxide and aluminum oxide obtained by replacing Si (OC 2 H 5 ) 4 of Example 6 with 316.8 g of Al (Oi—C 3 H 7 ) 3 was used as a support. A honeycomb catalyst was obtained by the same method as in Example 6.
- Example 8 Except that the composite oxide of titanium oxide and zirconium oxide obtained by replacing Si (OC 2 H 5 ) 4 of Example 6 with 985.5 g of Zr (O—iC 4 H 9 ) 4 was used as a support. A honeycomb catalyst was obtained by the same method as in Example 6.
- This kneaded product was extrusion molded to obtain an integral honeycomb molded product having a pitch of 5.0 mm and a wall thickness of 1.0 mm.
- the molded product was dried at room temperature until the water content became 10%, and then fired at 500 ° C. for 5 hours to remove the organic plasticizer, thereby obtaining a honeycomb catalyst.
- COS hydrolysis reaction Using the catalysts of the above Examples and Comparative Examples, COS hydrolysis reaction was performed under the test conditions shown in Table 1. The COS conversion rate was obtained by the following formula 4. The results are shown in Table 2.
- the use of the catalyst for hydrolysis of carbonyl sulfide and hydrogen cyanide and the titanium oxide-based composition of the present invention is industrially useful because COS and HCN can be simultaneously removed at a high decomposition rate.
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Abstract
Description
石炭ガス化ガスの精製プロセスには、一例として図1のように、ガス化炉4で石炭をガス化し、脱塵装置5で脱塵処理したガスをCOS変換装置6に導入することにより、ガス中のCOSを二酸化炭素(CO2)と硫化水素(H2S)に変換後、H2S/CO2回収装置7にてこれらを回収するプロセス構成が挙げられる。このように精製したガスは、その後化成品合成8や発電9等に使用される。
そのため、例えばCOSやHCNの変換工程においても、これまで用いられてきた加水分解触媒よりも、さらに優れた分解性能を有する触媒を提供することは、新たな課題であるといえる。
そうしたところ、所定の金属を主成分とする活性成分を、耐食性に優れている酸化チタン系の担体に高分散担持することにより、COSやHCNを同時に高分解率で除去できることを見出し、本発明を完成するに至った。
タン系組成物の使用について、詳細に説明する。
まず、本発明の触媒は、硫化カルボニルおよびシアン化水素の加水分解用の触媒であり、バリウム、ニッケル、ルテニウム、コバルト、モリブデンからなる群から選択される金属の少なくとも1種を主成分とする活性成分を少なくとも含む。これらの金属を主成分とすれば、硫化カルボニルのみならずシアン化水素についても高い分解性能を満足することができる。主成分は上記金属を組み合わせたものでも良く、その担持量は、0.1~25質量%、より好ましくは5~22質量%とするのが良い。
また、本発明の触媒は、前記活性成分を担持する酸化チタン系担体を含む。酸化チタン系担体としては、酸化チタンや酸化チタンと他の酸化物との複合酸化物等が挙げられる。
このような担体であれば、活性成分を確実に固定化することが可能であり、また、触媒使用条件下において化学的に安定しているため、触媒の働きを阻害することがない。
酸化チタンを複合金属酸化物化することにより、比表面積が増大し、耐熱性も向上することとなる。
酸化チタン系複合酸化物としては、酸化チタンと酸化ケイ素の複合酸化物、酸化チタンと酸化アルミニウムの複合酸化物、酸化チタンと酸化ジルコニウムの複合酸化物からなる
群から選択される少なくとも1種が挙げられる。酸化チタンと複合する金属酸化物との複合割合は、1:99~99:1であること好ましく,特に50:50~95:5の範囲が好ましい。活性成分を担持する場である比表面積が大きく出来る範囲だからである。
また、担体が酸化チタン系複合酸化物である場合には、当該複合酸化物を予め調製することが必要となる。複合酸化物の調製は、例えばチタンやケイ素、アルミニウム、ジルコニウムの金属硝酸塩、塩化物、硫酸塩等の金属塩水溶液にアンモニア等のアルカリ溶液を滴下して、共沈させて複合水酸化物を形成させたうえで、洗浄、乾燥、焼成すること等によって行うことができる。また、この方法以外によっても調製することは可能である。
[実施例1]
アナターゼ型酸化チタン粉末(日揮触媒化成社製CSP-003)100質量部に対して炭酸バリウム(林純薬製試薬特級)を、酸化バリウムに換算して4質量部となるように添加し、10%アンモニア水5質量部を加えて60分ニーダー混練を行った。次に、この混練物にバインダとしてグラスファイバを3質量部、カオリンを5質量部、さらに有機可塑剤として酢酸セルロース5質量部と10%アンモニア水5質量部を添加して混練を行った。
この混練物を押出成形し、5.0mmピッチ、壁厚1.0mmの一体型ハニカム成形物を得た。この成形物を含水率10%となるまで室温乾燥させた後、500℃にて5時間焼成して有機可塑剤を除去することにより、ハニカム触媒を得た。
炭酸バリウムに代えて炭酸ニッケル(林純薬製試薬特級)を酸化ニッケルに換算して4質量部となるように添加する他は、実施例1と同様の方法により、ハニカム触媒を得た。
炭酸バリウムに代えて硝酸ルテニウム(田中貴金属工業株式会社製、Ru量50g/L)をルテニウム換算で0.1質量部を添加する他は、実施例1と同様の方法により、ハニカム触媒を得た。
炭酸バリウムに代えて炭酸ニッケルを酸化ニッケルに換算して4質量部とモリブデン酸アンモニウム(林純薬社製特級)を酸化モリブデンに換算して10質量部を添加する他は、実施例1と同様の方法により、ハニカム触媒を得た。
炭酸バリウムに代えて炭酸コバルト(林純薬社製特級)を酸化コバルトに換算して5質量部とモリブデン酸アンモニウムを酸化モリブデンに換算して10質量部を添加する他は、実施例1と同様の方法により、ハニカム触媒を得た。
1125.8gのTi源であるTi(Oi-C3H7)4と57.6gのSi(OC2H5)4を混合し、80℃の水15000gに添加して加水分解し、さらに2時間、同温度の水中で攪拌して熟成させた。熟成後に得られた生成物をろ過して十分洗浄した後、乾燥、焼成(500℃で5時間)を施して得られた酸化チタンと酸化ケイ素の複合酸化物を担体として用いた事以外は、実施例1と同様の方法により、ハニカム触媒を得た。
実施例6のSi(OC2H5)4を、316.8gのAl(Oi-C3H7)3に替えて得られた酸化チタンと酸化アルミニウムの複合酸化物を担体として用いた事以外は、実施例6と同様の方法により、ハニカム触媒を得た。
実施例6のSi(OC2H5)4を、985.5gのZr(O-iC4H9)4に替えて得られた酸化チタンと酸化ジルコニウムの複合酸化物を担体として用いた事以外は、実施例6と同様の方法により、ハニカム触媒を得た。
アナターゼ型酸化チタン粉末(日揮触媒化成社製CSP-003)100質量部に対して10%アンモニア水5質量部を加えて60分ニーダー混練を行った。次に、この混練物にバインダとしてグラスファイバを3質量部、カオリンを5質量部、さらに有機可塑剤として酢酸セルロース5質量部と10%アンモニア水5質量部を添加して混練を行った。
この混練物を押出成形し、5.0mmピッチ、壁厚1.0mmの一体型ハニカム成形物を得た。この成形物を含水率10%となるまで室温乾燥させた後、500℃にて5時間焼成して有機可塑剤を除去することにより、ハニカム触媒を得た。
上記実施例および比較例の触媒を用いて、表1に示す試験条件により、COSの加水分解反応を行った。COS変換率は、下記式4により求めた。結果を表2に示す。
上記実施例および比較例の触媒を用いて、表3に示す実際の石炭ガス化ガスを使用し、HCNの加水分解反応を行った。HCN変換率は、下記式5により求めた。結果を表4に示す。
以上の結果から、本発明の触媒がCOS転換性能及びHCN分解性能に優れていることは明らかである。
2 石炭
3 酸素
4 ガス化炉
5 脱塵装置
6 COS変換装置
7 H2S/CO2回収装置
8 化成品合成
9 発電
Claims (10)
- 硫化カルボニルおよびシアン化水素の加水分解用触媒であって、
バリウム、ニッケル、ルテニウム、コバルト、モリブデンからなる群から選択される金属の少なくとも1種を主成分とする活性成分と、
前記活性成分を担持する酸化チタン系担体と
を少なくとも含むことを特徴とする加水分解用触媒。 - 前記担体に、炭酸バリウム、炭酸ニッケル、硝酸ルテニウム、炭酸コバルト、モリブデン酸アンモニウムからなる群から選択される金属塩の少なくとも1種を添加してなる請求項1記載の加水分解用触媒。
- 前記担体が、酸化チタンである請求項1または請求項2記載の加水分解用触媒。
- 前記担体が、酸化チタンと酸化ケイ素の複合酸化物、酸化チタンと酸化アルミニウムの複合酸化物、酸化チタンと酸化ジルコニウムの複合酸化物からなる群から選択される酸化チタン系複合酸化物の少なくとも1種である請求項1または請求項2記載の加水分解用触媒。
- 前記加水分解用触媒が、ハニカム形状である請求項1~請求項4のいずれかに記載の加水分解用触媒。
- 硫化カルボニルおよびシアン化水素を加水分解するための触媒としての酸化チタン系組成物の使用であって、
前記組成物が、
バリウム、ニッケル、ルテニウム、コバルト、モリブデンからなる群から選択される金属の少なくとも1種を主成分とする活性成分と、
前記活性成分を担持する酸化チタン系担体と
を少なくとも含むことを特徴とする酸化チタン系組成物の使用。 - 前記組成物が、前記担体に炭酸バリウム、炭酸ニッケル、硝酸ルテニウム、炭酸コバルト、モリブデン酸アンモニウムからなる群から選択される金属塩の少なくとも1種を添加してなる請求項6記載の酸化チタン系組成物の使用。
- 前記担体が、酸化チタンである請求項6または請求項7記載の酸化チタン系組成物の使用。
- 前記担体が、酸化チタンと酸化ケイ素の複合酸化物、酸化チタンと酸化アルミニウムの複合酸化物、酸化チタンと酸化ジルコニウムの複合酸化物からなる群から選択される酸化チタン系複合酸化物の少なくとも1種である請求項6または請求項7記載の酸化チタン系組成物の使用。
- 前記組成物が、ハニカム形状である請求項6~請求項9のいずれかに記載の酸化チタン系組成物の使用。
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WO2015098319A1 (ja) * | 2013-12-27 | 2015-07-02 | 三菱重工業株式会社 | Cos転換触媒の触媒再生方法 |
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US9486797B2 (en) | 2013-12-27 | 2016-11-08 | Mitsubishi Heavy Industries, Ltd. | Method for regenerating COS hydrolysis catalyst |
CN115106108B (zh) * | 2021-03-18 | 2023-11-14 | 宝山钢铁股份有限公司 | 高炉煤气用cos水解催化剂及其制备方法 |
Also Published As
Publication number | Publication date |
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US9878310B2 (en) | 2018-01-30 |
EP2818240A4 (en) | 2015-10-14 |
AU2013223391B2 (en) | 2016-06-02 |
US20140369915A1 (en) | 2014-12-18 |
AU2013223391A1 (en) | 2014-08-14 |
JP5955026B2 (ja) | 2016-07-20 |
CN104039440A (zh) | 2014-09-10 |
DK2818240T3 (da) | 2020-08-17 |
EP2818240A1 (en) | 2014-12-31 |
PL2818240T3 (pl) | 2021-01-11 |
JP2013173099A (ja) | 2013-09-05 |
EP2818240B1 (en) | 2020-06-17 |
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