CN115920909A - xCuO-yIn for CO selective oxidation in hydrogen-rich gas 2 O 3 /CeO 2 Catalyst and preparation method thereof - Google Patents
xCuO-yIn for CO selective oxidation in hydrogen-rich gas 2 O 3 /CeO 2 Catalyst and preparation method thereof Download PDFInfo
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- 239000003054 catalyst Substances 0.000 title claims abstract description 57
- 230000003647 oxidation Effects 0.000 title claims abstract description 24
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 24
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 22
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 239000001257 hydrogen Substances 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000003756 stirring Methods 0.000 claims abstract description 22
- 239000000725 suspension Substances 0.000 claims abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000007787 solid Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 150000001879 copper Chemical class 0.000 claims abstract description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 11
- 150000002471 indium Chemical class 0.000 claims abstract description 8
- 238000011068 loading method Methods 0.000 claims abstract description 6
- 238000009777 vacuum freeze-drying Methods 0.000 claims abstract description 6
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 238000005303 weighing Methods 0.000 claims description 4
- XURCIPRUUASYLR-UHFFFAOYSA-N Omeprazole sulfide Chemical compound N=1C2=CC(OC)=CC=C2NC=1SCC1=NC=C(C)C(OC)=C1C XURCIPRUUASYLR-UHFFFAOYSA-N 0.000 claims description 3
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 229910000365 copper sulfate Inorganic materials 0.000 claims description 2
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 claims description 2
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 claims description 2
- OPQARKPSCNTWTJ-UHFFFAOYSA-L copper(ii) acetate Chemical compound [Cu+2].CC([O-])=O.CC([O-])=O OPQARKPSCNTWTJ-UHFFFAOYSA-L 0.000 claims description 2
- VBXWCGWXDOBUQZ-UHFFFAOYSA-K diacetyloxyindiganyl acetate Chemical compound [In+3].CC([O-])=O.CC([O-])=O.CC([O-])=O VBXWCGWXDOBUQZ-UHFFFAOYSA-K 0.000 claims description 2
- PSCMQHVBLHHWTO-UHFFFAOYSA-K indium(iii) chloride Chemical compound Cl[In](Cl)Cl PSCMQHVBLHHWTO-UHFFFAOYSA-K 0.000 claims description 2
- 239000012266 salt solution Substances 0.000 claims description 2
- 238000003786 synthesis reaction Methods 0.000 claims description 2
- LBJNMUFDOHXDFG-UHFFFAOYSA-N copper;hydrate Chemical compound O.[Cu].[Cu] LBJNMUFDOHXDFG-UHFFFAOYSA-N 0.000 claims 4
- 150000003839 salts Chemical class 0.000 claims 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 abstract description 2
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 abstract description 2
- 238000007710 freezing Methods 0.000 abstract description 2
- 230000008014 freezing Effects 0.000 abstract description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 17
- 239000010949 copper Substances 0.000 description 8
- 239000005751 Copper oxide Substances 0.000 description 7
- 229910000431 copper oxide Inorganic materials 0.000 description 7
- 229910003437 indium oxide Inorganic materials 0.000 description 7
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- SKEYZPJKRDZMJG-UHFFFAOYSA-N cerium copper Chemical compound [Cu].[Ce] SKEYZPJKRDZMJG-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004108 freeze drying Methods 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
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- Catalysts (AREA)
Abstract
The invention discloses xCuO-yIn for selective oxidation of CO in hydrogen-rich gas 2 O 3 /CeO 2 A catalyst and a preparation method thereof. In which CuO and In 2 O 3 As active component, ceO 2 Is a carrier. x and y represent CuO and In the catalyst 2 O 3 The mass percentage of (A) is as follows. CuO and CeO 2 The mass ratio of the carrier is (1.0-10.0)/100, namely the load capacity of CuO is 1.0-10.0 wt%, in 2 O 3 With CeO 2 The mass ratio of the carrier is (0.1-2.0)/100, namely In 2 O 3 The loading amount of the catalyst is 0.1-2.0 wt%. The preparation method comprises the following steps: (1) Is removed fromDissolving copper salt and indium salt with water; (2) Adding a cerium dioxide carrier into the solution, and fully stirring; (3) Freezing the obtained suspension liquid by using liquid nitrogen, and transferring the suspension liquid to a vacuum freeze drying oven for vacuum freeze drying; (4) And collecting the solid, and roasting to obtain the CO selective oxidation catalyst. The invention is easy to prepare and has excellent selective oxidation performance of CO in hydrogen-rich gas.
Description
Technical Field
The invention relates to xCuO-yIn for CO selective oxidation in hydrogen-rich gas 2 O 3 /CeO 2 A catalyst, a preparation method and application thereof.
Background
Conventional fossil energy is mainly used in power generation and engine combustion processes, which causes many problems such as energy shortage and air pollution. Proton Exchange Membrane Fuel Cells (PEMFCs) have great application potential in residential power generation and mobile power sources due to the characteristics of high energy conversion efficiency, no pollution and the like. Whereas hydrogen produced by the low temperature Water Gas Shift (WGS) reaction of hydrocarbons or bioethanol, which always contains about 0.5-1.0vol% of CO, is insufficient to meet the demand for ideal raw material gases for PEMFCs because a small amount of CO poisons Pt anodes and reduces the amount of CO used for adsorption/dissociation and oxidation of H 2 Thereby reducing the efficiency of the PEMFCs. The selective oxidation of CO (CO-PROX) by introducing a small amount of oxygen into a hydrogen-rich gas is a highly efficient and simple method for removing CO to less than 100 ppm. In order to achieve a high selective conversion of CO at moderate temperatures (between WGS temperature and PEMFC operating temperature), efforts have been made to develop an ideal CO-PROX catalyst. The supported noble metal catalyst (Au, pt, ru) is the most studied catalyst, but the high cost and low selectivity hinder the practical application. Fortunately, some transition metal supported catalysts, especially cerium supported CuO catalysts, have received attention due to their unique oxygen storage properties, easy reducibility, ability to firmly fix Cu and reduce its sintering tendency, and exhibit superior activity, selectivity and CO resistance to CO-PROX 2 And H 2 The capacity of O. Recently, catalysts modified with main group elements (such as P, in, sn, and Bi) have been shown to be significantly reactive towards CO oxidation. In particular, in exhibits a specific charge transport property among these auxiliaries.
Among all the methods for preparing supported catalysts, the impregnation method is most widely used. The method is simple to operate and low in cost, but has the defect of uneven distribution of the active component on the surface of the carrier. Freeze-drying is expected to ameliorate this disadvantage.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide xCuO-yIn for selective oxidation of CO in hydrogen-rich gas 2 O 3 /CeO 2 A catalyst, a preparation method and application thereof.
xCuO-yIn for CO selective oxidation in hydrogen-rich gas 2 O 3 /CeO 2 The catalyst is a supported catalyst, and the carrier is CeO 2 CuO and In 2 O 3 Is an active component; cuO and CeO 2 The mass ratio of the carrier is (1.0-10.0)/100, namely the load capacity of CuO is 1.0-10.0 wt%, in 2 O 3 With CeO 2 The mass ratio of the carrier is (0.1-2.0)/100, namely In 2 O 3 The loading amount of the catalyst is 0.1-2.0 wt%.
Preferably, the CuO and CeO 2 The mass ratio of the carrier is (3.0-6.0)/100, namely the load amount of CuO is 3.0-6.0 wt%.
Preferably, said In 2 O 3 With CeO 2 The mass ratio of the carrier is (0.5-1.5)/100, namely In 2 O 3 The loading amount of (B) is 0.5-1.5 wt%.
The xCuO-yIn 2 O 3 /CeO 2 The synthesis steps of the catalyst are realized as follows:
weighing a proper amount of copper salt and indium salt, adding the copper salt and the indium salt into a proper amount of deionized water, and continuously stirring for 2-10 minutes;
step (2) weighing a proper amount of CeO 2 The carrier is poured into the copper salt solution in the stirring process, and the stirring process is continued for 10 to 120 minutes at normal temperature;
transferring the suspension into a culture dish, and pouring a proper amount of liquid nitrogen into the culture dish to freeze the suspension;
transferring the culture dish to a vacuum freeze dryer for vacuum freeze drying for 18-72 hours;
collecting the solid in the culture dish, and roasting for 1-5 hours at 400-800 ℃ in the air atmosphere to obtain the high-performance CO selective oxidation catalyst (xCuO-yIn) in the hydrogen-rich gas 2 O 3 /CeO 2 ) (ii) a The CuO content In the catalyst is 1-10wt%, in 2 O 3 The content of (B) is 0.1-2wt%.
Preferably, the copper salt is any one of copper nitrate or a hydrate thereof, copper chloride or a hydrate thereof, copper sulfate or a hydrate thereof, and copper acetate or a hydrate thereof.
Preferably, the indium salt is any one of indium nitrate or a hydrate thereof, indium chloride or a hydrate thereof, and indium acetate or a hydrate thereof.
Preferably, the copper salt is copper nitrate or a hydrate thereof.
Preferably, the indium salt is indium nitrate or a hydrate thereof.
Preferably, the calcination temperature is 400 ℃ and the calcination time is 2 hours.
The invention has the following beneficial effects:
the invention introduces indium into the original formula of the copper-cerium catalyst, thereby further improving the catalytic performance. Meanwhile, the defect of uneven distribution of active components of the catalyst prepared by the traditional impregnation method is overcome. Prepared xCuO-yIn 2 O 3 /CeO 2 The catalyst can reduce the selectivity of CO in the hydrogen-rich gas to be less than 100ppm within the reaction temperature f range of 120-180 ℃. The invention relates to a high-performance CO selective oxidation catalyst (xCuO-yIn) in hydrogen-rich gas 2 O 3 /CeO 2 ) Has important significance for the popularization and the application of the fuel cell.
Detailed Description
The present invention will be further described with reference to the following examples.
The invention discloses an xCuO-yIn for CO selective oxidation in hydrogen-rich gas 2 O 3 /CeO 2 A catalyst and a preparation method thereof. In which CuO and In 2 O 3 As active component, ceO 2 To be loadedA body. x and y represent CuO and In the catalyst 2 O 3 The mass percentage of (A) is as follows. CuO and CeO 2 The mass ratio of the carrier is (1.0-10.0)/100, namely the load capacity of CuO is 1.0-10.0 wt%, in 2 O 3 With CeO 2 The mass ratio of the carrier is (0.1-2.0)/100, namely In 2 O 3 The loading amount of the catalyst is 0.1-2.0 wt%. The preparation method comprises the following steps: (1) dissolving copper salt and indium salt by using deionized water; (2) Adding a cerium dioxide carrier into the solution, and fully stirring; (3) Freezing the obtained suspension liquid by using liquid nitrogen, and transferring the suspension liquid to a vacuum freeze drying box for vacuum freeze drying; (4) And collecting the solid, and roasting to obtain the CO selective oxidation catalyst. The invention is easy to prepare and has excellent selective oxidation performance of CO in hydrogen-rich gas.
Example 1
A100 mL beaker was charged with 15mL of deionized water, and 0.06g of Cu (NO) was added 3 ) 2 ·2H 2 O and 5.4mg of InN 3 O 9 ·xH 2 O (MW = 300.83), dissolved with stirring, and then 0.5g of CeO was added at room temperature with stirring 2 The support was stirred for an additional 30 minutes. The resulting suspension was transferred to a petri dish of 10 cm diameter and the suspension was frozen by rapidly pouring liquid nitrogen into the petri dish. The resulting dish was then transferred to a freeze dryer for 24 hours. Finally, the culture dish is taken out, the collected solid is transferred to a 100mL crucible to be roasted for 2 hours at the temperature of 400 ℃ under the air condition, and the catalyst is prepared, which is abbreviated as 4CuO-0.5In 2 O 3 /CeO 2 The copper oxide content In the catalyst was 4wt%, indium oxide (In) 2 O 3 ) The content is 0.5wt%.
Example 2
To a 100mL beaker was added 15mL of deionized water, 0.075g of Cu (NO) 3 ) 2 ·2H 2 O and 5.4mg of InN 3 O 9 ·xH 2 O (MW = 300.83), dissolved with stirring, then 0.5g CeO was added at room temperature with stirring 2 The support was stirred for an additional 30 minutes. The resulting suspension was transferred to a petri dish of 10 cm diameter and the suspension was frozen by rapidly pouring liquid nitrogen into the petri dish. The resulting petri dish was then transferred to freeze-dryingFreeze-drying in the machine for 24 hours. Finally, the culture dish is taken out, the collected solid is transferred to a 100mL crucible to be roasted for 2 hours at the temperature of 400 ℃ under the air condition, and the catalyst is prepared, which is abbreviated as 5CuO-0.5In 2 O 3 /CeO 2 The copper oxide content In the catalyst was 5wt%, indium oxide (In) 2 O 3 ) The content is 0.5wt%.
Example 3
A100 mL beaker was charged with 15mL of deionized water, and 0.06g of Cu (NO) was added 3 ) 2 ·2H 2 O and 10.8mg of InN 3 O 9 ·xH 2 O (MW = 300.83), dissolved with stirring, and then 0.5g of CeO was added at room temperature with stirring 2 The support was stirred for an additional 30 minutes. The resulting suspension was transferred to a petri dish of 10 cm diameter and the suspension was frozen by rapidly pouring liquid nitrogen into the petri dish. The resulting dish was then transferred to a freeze dryer for 24 hours. Finally, the culture dish is taken out, the collected solid is transferred to a 100mL crucible to be roasted for 2 hours at the temperature of 400 ℃ under the air condition, and the catalyst, which is abbreviated as 4CuO-1In 2 O 3 /CeO 2 The copper oxide content In the catalyst was 4wt%, indium oxide (In) 2 O 3 ) The content is 1wt%.
Example 4
A100 mL beaker was charged with 15mL of deionized water, and 0.06g of Cu (NO) was added 3 ) 2 ·2H 2 O and 16.2mg InN 3 O 9 ·xH 2 O (MW = 300.83), dissolved with stirring, and then 0.5g of CeO was added at room temperature with stirring 2 The support was stirred for an additional 30 minutes. The resulting suspension was transferred to a petri dish of 10 cm diameter and the suspension was frozen by rapidly pouring liquid nitrogen into the petri dish. The resulting dish was then transferred to a freeze dryer for 24 hours. Finally taking out the culture dish, collecting the solid, transferring the solid to a 100mL crucible, and roasting the solid for 2 hours at 400 ℃ under the air condition to prepare the catalyst, which is abbreviated as 4CuO-1.5In 2 O 3 /CeO 2 The copper oxide content In the catalyst was 4wt%, indium oxide (In) 2 O 3 ) The content was 1.5wt%.
Example 5
To a 100mL beaker was added 15mL of deionized water, 0.075g of Cu (NO) 3 ) 2 ·2H 2 O and 10.8mg of InN 3 O 9 ·xH 2 O (MW = 300.83), dissolved with stirring, and then 0.5g of CeO was added at room temperature with stirring 2 The support was stirred for an additional 30 minutes. The resulting suspension was transferred to a petri dish of 10 cm diameter and the suspension was frozen by rapidly pouring liquid nitrogen into the petri dish. The resulting dish was then transferred to a lyophilizer for 24 hours. Finally, the culture dish is taken out, the collected solid is transferred to a 100mL crucible to be roasted for 2 hours at the temperature of 400 ℃ under the air condition, and the catalyst is prepared, which is abbreviated as 5CuO-1.5In 2 O 3 /CeO 2 The copper oxide content of the catalyst was 5wt%, and indium oxide (In) 2 O 3 ) The content was 1.5wt%.
Example 6
A100 mL beaker was charged with 15mL of deionized water, and 0.09g of Cu (NO) was added 3 ) 2 ·2H 2 O and 10.8mg of InN 3 O 9 ·xH 2 O (MW = 300.83), dissolved with stirring, and then 0.5g of CeO was added at room temperature with stirring 2 The support was stirred for an additional 30 minutes. The resulting suspension was transferred to a petri dish of 10 cm diameter and the suspension was frozen by rapidly pouring liquid nitrogen into the petri dish. The resulting dish was then transferred to a freeze dryer for 24 hours. Finally, the culture dish is taken out, the collected solid is transferred to a 100mL crucible to be roasted for 2 hours at the temperature of 400 ℃ under the air condition, and the catalyst, which is abbreviated as 6CuO-1In 2 O 3 /CeO 2 The copper oxide content In the catalyst was 6wt%, indium oxide (In) 2 O 3 ) The content is 1wt%.
Example 7
A100 mL beaker was charged with 15mL of deionized water, and 0.09g of Cu (NO) was added 3 ) 2 ·2H 2 O and 16.2mg InN 3 O 9 ·xH 2 O (MW = 300.83), dissolved with stirring, and then 0.5g of CeO was added at room temperature with stirring 2 The support was stirred for an additional 30 minutes. The resulting suspension was transferred to a petri dish of 10 cm diameter and liquid nitrogen was rapidly poured into the petri dish to suspendThe suspension is frozen. The resulting dish was then transferred to a freeze dryer for 24 hours. Finally, the culture dish is taken out, the collected solid is transferred to a 100mL crucible to be roasted for 2 hours at the temperature of 400 ℃ under the air condition, and the catalyst, which is abbreviated as 6CuO-1.5In, is prepared 2 O 3 /CeO 2 The copper oxide content In the catalyst was 6wt%, indium oxide (In) 2 O 3 ) The content is 1.5wt%. The results of the CO preferential oxidation catalytic performance test of the catalysts of the examples are shown in Table 1.
Note: the amount of the catalyst used was 0.100g (40-60 mesh), the reaction gas composition was 1vol% CO, 1vol% O 2 、50vol％H 2 And 48vol% He. The gas flow rate was 18000 mL/g CAT -1 ·h -1 。
TABLE 1
Claims (6)
1. xCuO-yIn for CO selective oxidation in hydrogen-rich gas 2 O 3 /CeO 2 A catalyst, characterized by: it is a supported catalyst, and the carrier is CeO 2 CuO and In 2 O 3 As active components, x and y represent CuO and In the catalyst 2 O 3 The mass percentage of (A); cuO and CeO 2 The mass ratio of the carrier is (1.0-10.0)/100, namely the load capacity of CuO is 1.0-10.0 wt%, in 2 O 3 With CeO 2 The mass ratio of the carrier is (0.1-2.0)/100, namely In 2 O 3 The loading amount of the catalyst is 0.1-2.0 wt%.
2. xCuO-yIn for selective oxidation of CO in hydrogen-rich gas as in claim 1 2 O 3 /CeO 2 A catalyst, characterized by: cuO and CeO 2 The mass ratio of the carrier is (3.0-6.0)/100, namely the load amount of CuO is 3.0-6.0 wt%.
3. X for the selective oxidation of CO in hydrogen-rich gas according to claim 1 or 2CuO-yIn 2 O 3 /CeO 2 A catalyst, characterized by: in 2 O 3 With CeO 2 The mass ratio of the carrier is (0.5-1.5)/100, namely In 2 O 3 The loading amount of (B) is 0.5-1.5 wt%.
4. xCuO-yIn for selective oxidation of CO in hydrogen-rich gas as in claim 1 2 O 3 /CeO 2 The catalyst is characterized in that xCuO-yIn is adopted 2 O 3 /CeO 2 The synthesis steps of the catalyst are realized as follows:
weighing a proper amount of copper salt and indium salt, adding the copper salt and the indium salt into a proper amount of deionized water, and continuously stirring for 2-10 minutes;
step (2) weighing a proper amount of CeO 2 The carrier is poured into the copper salt solution in the stirring process, and the stirring process is continued for 10 to 120 minutes at normal temperature;
transferring the suspension into a culture dish, and pouring a proper amount of liquid nitrogen into the culture dish to freeze the suspension;
transferring the culture dish to a vacuum freeze dryer for vacuum freeze drying for 18-72 hours;
collecting the solid in the culture dish, and roasting for 1-5 hours at 400-800 ℃ in the air atmosphere to obtain the high-performance CO selective oxidation catalyst (xCuO-yIn) in the hydrogen-rich gas 2 O 3 /CeO 2 ) (ii) a The CuO content In the catalyst is 1-10wt%, in 2 O 3 The content of (B) is 0.1-2wt%.
5. xCuO-yIn for the selective oxidation of CO in hydrogen-rich gas as in claim 4 2 O 3 /CeO 2 The catalyst is characterized in that the copper salt is any one of copper nitrate or hydrate thereof, copper chloride or hydrate thereof, copper sulfate or hydrate thereof, and copper acetate or hydrate thereof.
6. xCuO-yIn for selective oxidation of CO in hydrogen-rich gas as in claim 4 2 O 3 /CeO 2 Catalyst, characterized in that the indiumThe salt is any one of indium nitrate or a hydrate thereof, indium chloride or a hydrate thereof, and indium acetate or a hydrate thereof.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101455965A (en) * | 2009-01-04 | 2009-06-17 | 上海大学 | Low water-gas ratio transformation catalyst in hydrogen rich gas and preparation method thereof |
| US20130183221A1 (en) * | 2012-01-13 | 2013-07-18 | National Central University | Preparation of copper oxide-cerium oxide-supported nano-gold catalysts and its application in removal of carbon monoxide in hydrogen stream |
| CN114713238A (en) * | 2022-04-20 | 2022-07-08 | 浙江大学衢州研究院 | CuO/CeO2Nanorod catalyst and synthesis and application thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101455965A (en) * | 2009-01-04 | 2009-06-17 | 上海大学 | Low water-gas ratio transformation catalyst in hydrogen rich gas and preparation method thereof |
| US20130183221A1 (en) * | 2012-01-13 | 2013-07-18 | National Central University | Preparation of copper oxide-cerium oxide-supported nano-gold catalysts and its application in removal of carbon monoxide in hydrogen stream |
| CN114713238A (en) * | 2022-04-20 | 2022-07-08 | 浙江大学衢州研究院 | CuO/CeO2Nanorod catalyst and synthesis and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| XIAO-MAN ZHANG ET AL.: "Tuning the dynamic interfacial structure of copper-ceria catalysts by indium oxide during CO oxidation", 《ACS CATAL.》, vol. 8, 30 April 2018 (2018-04-30), pages 5261 - 5275 * |
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