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Zinc-nickel-zirconium mesoporous composite oxide catalyst for hydrogen production by autothermal reforming of acetic acid

A composite oxide, autothermal reforming technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical/physical process, etc. It is easy to be oxidized and other problems to achieve the effect of improving catalytic activity, improving anti-sintering and inhibiting oxidation.

Active Publication Date: 2019-10-25
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a stable structure, resistant A new type of catalyst with sintering, anti-oxidation, anti-coke, stable activity

Method used

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  • Zinc-nickel-zirconium mesoporous composite oxide catalyst for hydrogen production by autothermal reforming of acetic acid
  • Zinc-nickel-zirconium mesoporous composite oxide catalyst for hydrogen production by autothermal reforming of acetic acid

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] Weigh 3.009g of Ni(NO 3 ) 2 ·6H 2 O, 9.236g of Zn(NO 3 ) 2 ·6H 2 O and 3.688g of ZrO(NO 3 ) 2 2H 2 O, add 55mL of deionized water to prepare solution #1; weigh 7.727g of NaOH and 1.280g of anhydrous Na 2 CO 3 , add 102mL of deionized water to prepare solution #2; under the condition of 78°C and pH of the solution at 10.5±0.5, add solution #1 and solution #2 dropwise into the beaker and keep stirring for co-precipitation reaction, and continue Stir and age for 18 hours; after the aging, the mixture was suction filtered and washed three times, and the resulting precipitate was dried in a 105°C oven for 24 hours, and the precipitate was calcined at 700°C for 4 hours to obtain CDUT-ZNZ-101 catalyst. The chemical composition of the catalyst is (ZnO) 2.25 (NiO) 0.75 ZrO 2 , The weight percentage is: zinc oxide is 50.5%, nickel oxide is 15.5%, zirconium oxide is 34.0%.

[0026] The reactivity evaluation of autothermal reforming of acetic acid was carried out in a ...

Embodiment 1

[0029] Weigh 3.094g of Ni (NO 3 ) 2 ·6H 2 O, 7.385g of Zn (NO 3 ) 2 ·6H 2 O and 4.739g of ZrO(NO 3 ) 2 2H 2 O, add 53mL of deionized water to prepare solution #1; weigh 9.079g of NaOH and 1.504g of anhydrous Na 2 CO 3 , add 121mL of deionized water to prepare solution #2; under the condition of 78°C and pH of the solution at 10.5±0.5, add solution #1 and solution #2 dropwise into the beaker and keep stirring for co-precipitation reaction, and continue Stirring and aging for 18 hours; after the aging, the mixture was suction filtered and washed 3 times, and the obtained precipitate was dried in a 105°C oven for 24 hours, and the precipitate was roasted at 700°C for 4 hours to obtain a compound containing ZnO, t-ZrO 2 , m-ZrO 2 and NiO Ni / ZnO-ZrO 2 Composite oxide catalyst, the typical structure of its composite oxide is as attached figure 1 As shown, the CDUT-ZNZ-102 catalyst is obtained; the catalyst is a mesoporous material, and the typical pore size distribution ...

Embodiment 2

[0032] Weigh 2.880g of Ni(NO 3 ) 2 ·6H 2 O, 4.420g of Zn (NO 3 ) 2 ·6H 2 O and 6.618g of ZrO(NO 3 ) 2 2H 2 O, add 50.5mL of deionized water to prepare solution #1; weigh 11.093g of NaOH and 1.837g of anhydrous Na 2 CO 3 , add 148mL of deionized water to prepare solution #2; under the condition of 78°C and pH of the solution at 10.5±0.5, add solution #1 and solution #2 dropwise into the beaker and keep stirring for co-precipitation reaction, and continue Stirring and aging for 18 hours; after the aging, the mixture was suction filtered and washed 3 times, and the obtained precipitate was dried in a 105°C oven for 24 hours, and the precipitate was roasted at 700°C for 4 hours to obtain Ni / ZnO-ZrO 2 Composite oxide catalyst, the typical structure of its composite oxide is as attached figure 1 As shown, the CDUT-ZNZ-103 catalyst is obtained; the catalyst is a mesoporous material, and the typical pore size distribution of its mesoporous structure is shown in the attached ...

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Abstract

The invention relates to a zinc-nickel-zirconium mesoporous composite oxide catalyst for hydrogen production by autothermal reforming of acetic acid. Directed at the problem that catalyst structure change and the oxidation and sintering of active components can cause catalyst deactivation in existing catalysts during the autothermal reforming reaction of acetic acid, the invention provides a new catalyst characterized by stable structure, sintering resistance, carbon deposition resistance, oxidation resistance, and high activity. The chemical composition of the catalyst is (ZnO)a(NiO)b(ZrO2)c,wherein a is 0.60-2.25, b is 0.40-0.75 and c is 1.00. The invention adopts Ni as the active component, uses ZnO and ZrO2 as the carrier, and adopts coprecipitation method to prepare the Ni / ZnO-ZrO 2composite oxide catalyst, which effectively inhibits the formation of ketene, acetone and other by-products in the reaction process, improves the yield and selectivity of hydrogen, and improves the carbon deposition resistance, sintering resistance and oxidation resistance of the catalyst.

Description

technical field [0001] The invention relates to a zinc-nickel-zirconium mesoporous composite oxide catalyst for hydrogen production by autothermal reforming of acetic acid and a preparation method thereof, belonging to the field of hydrogen production by autothermal reforming of acetic acid. Background technique [0002] So far, most of the fuels used by countries in the world are still fossil fuels, but the problem of environmental pollution still exists. Hydrogen energy is considered by many scientists as an important secondary energy source on the world energy stage because of its high combustion calorific value, wide range of sources, and environmental friendliness. Hydrogen production from biomass is one of the important ways to obtain hydrogen from nature sustainably. However, the energy density of biomass is low, and it is not easy to produce hydrogen on a large scale. Therefore, biomass is usually pyrolyzed into biomass oil with high energy density, easy storage and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78C01B3/32
Inventor 黄利宏张羽王巧王星月杨浩代伶文刘燕
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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