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Barium aluminate spinel composite oxide cobalt-based catalyst for hydrogen production by autothermal reforming of acetic acid

A cobalt-based catalyst, aluminum spinel technology, applied in metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical/physical process and other directions, can solve problems such as catalyst deactivation, achieve enhanced Effects of thermal stability, prevention of migration and sintering, improvement of conversion rate and hydrogen production rate

Active Publication Date: 2021-06-04
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide a structurally stable, sintering-resistant , anti-coking, anti-oxidation new catalyst

Method used

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  • Barium aluminate spinel composite oxide cobalt-based catalyst for hydrogen production by autothermal reforming of acetic acid
  • Barium aluminate spinel composite oxide cobalt-based catalyst for hydrogen production by autothermal reforming of acetic acid

Examples

Experimental program
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Effect test

example 1

[0029] Weigh 1.428g of Co(NO 3 ) 2 ·6H 2 O, 5.252g of Ba(NO 3 ) 2 and 3.769g of Al(NO 3 ) 3 ·6H 2 O, dissolved in 20.0mL deionized water solution, heated to 60°C in water bath and stirred to prepare solution #1; dissolved 7.366g citric acid and 2.176g ethylene glycol in 20.0mL deionized water solution, heated to 60°C in water bath and stir to prepare solution #2; mix and stir solution #1 and solution #2 in a water bath at 60°C to form a gel and dry at 105°C for 12 hours, and the dried catalyst is calcined at 700°C for 4 hours, namely The catalyst CA-4B of the present invention is obtained. The weight percentage of the catalyst in terms of oxides is as follows: the content of barium oxide is 77.0%, the content of aluminum oxide is 12.8%, and the content of cobalt oxide is 10.2%.

[0030] The reactivity evaluation of autothermal reforming of acetic acid was carried out in a continuous flow fixed bed reactor. Grind and tablet the catalyst, then sieve it into 20-40 mesh p...

Embodiment 1

[0033] Weigh 1.459g of Co(NO 3 ) 2 ·6H 2 O, 4.586g of Ba(NO 3 ) 2 and 6.582g of Al(NO 3 ) 3 ·6H 2 O, dissolved in 20.0mL deionized water solution, heated to 60°C in water bath and stirred to prepare solution #1; dissolved 8.428g citric acid and 2.489g ethylene glycol in 20.0mL deionized water solution, heated to 60°C in water bath and stir to prepare solution #2; mix and stir solution #1 and solution #2 in a water bath at 60°C to form a gel and dry at 105°C for 12 hours, and the dried catalyst is calcined at 700°C for 4 hours, namely Get the Co-Ba-Al-O active center, BaCO 3 is the skeleton and has BaAl 2 o 4 、CoAl 2 o 4 Cobalt barium aluminum catalyst CA-2B with spinel phase, its typical structure is as attached figure 1 shown. The weight percentage of the catalyst in terms of oxides is as follows: the content of barium oxide is 67.2%, the content of aluminum oxide is 22.4%, and the content of cobalt oxide is 10.4%.

[0034] The CA-2B catalyst was used in the aut...

Embodiment 2

[0036] Weigh 1.509g of Co(NO 3 ) 2 ·6H 2 O, 3.655g of Ba(NO 3 ) 2 and 10.493g of Al(NO 3 ) 3 ·6H 2 O, dissolved in 20.0mL deionized water solution, heated to 60°C in water bath and stirred to prepare solution #1; dissolved 9.906g citric acid and 2.926g ethylene glycol in 20.0mL deionized water solution, heated to 60°C in water bath and stir to prepare solution #2; mix and stir solution #1 and solution #2 in a water bath at 60°C to form a gel and dry at 105°C for 12 hours, and the dried catalyst is calcined at 700°C for 4 hours, namely The catalyst CA-1B of the present invention is obtained; the weight percentage of the catalyst in terms of oxides is as follows: the content of barium oxide is 53.6%, the content of aluminum oxide is 35.6%, and the content of cobalt oxide is 10.8%.

[0037] The CA-1B catalyst was used in the autothermal reforming reaction of acetic acid to evaluate the hydrogen production performance. / H 2 O / O 2 / N 2 =1.00 / 4.00 / 0.28 / 3.90, the conversio...

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Abstract

The invention relates to a barium aluminate spinel composite oxide cobalt-based catalyst for hydrogen production by autothermal reforming of acetic acid. The invention provides a novel catalyst which is stable in structure, resistant to sintering, resistant to carbon deposition, resistant to oxidation and high in activity aiming at the problem that the catalyst is inactivated due to the change of the catalyst structure and the oxidation and sintering of active components in the autothermal reforming process of acetic acid in the existing catalyst, the molar composition of the catalyst is (BaO) a (AlO1.5) b (CoO1.5) c, wherein a is 0.285-0.588, b is 0.269-0.599, and c is 0.102-0.165; in terms of oxide, the weight percentage of the barium oxide is 52.0-78.0%, the weight percentage of the aluminum oxide is 12.0-36.0%, and the weight percentage of the cobalt oxide is 10.0-12.0%. The catalyst is prepared by adopting a sol-gel method, and the barium-aluminum composite oxide cobalt-based catalyst which takes Co-Ba-Al-O as an active center and BaCO3 as a framework and contains BaAl2O4 and CoAl2O4 spinel structures is formed after roasting, so that the oxidation resistance and the dispersity of active components are improved, and meanwhile, the hydrogen yield, the sintering resistance and the carbon deposition resistance in the acetic acid autothermal reforming process are improved.

Description

technical field [0001] The invention relates to a spinel-type composite oxide-promoted cobalt-based catalyst and a preparation method thereof, in particular to a cobalt-based catalyst in which barium-aluminum spinel and cobalt-aluminum spinel are loaded on a barium carbonate skeleton and its preparation The method belongs to the field of producing hydrogen by autothermal reforming of acetic acid. Background technique [0002] The rapid population growth and economic development have led to an increase in global energy demand, and the large amount of greenhouse gases emitted by traditional fossil energy use has also become an important factor affecting the ecosystem. As an excellent energy carrier, hydrogen has the advantages of cleanliness and high efficiency, and is currently one of the most promising clean energy sources. [0003] Among renewable resources, biomass is carbon-neutral and environmentally friendly. The cellulose, hemicellulose or lignin in the biomass is su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78B01J35/00C01B3/32
CPCB01J23/005B01J23/78C01B3/326C01B2203/0233C01B2203/0227B01J35/394Y02P20/52
Inventor 黄利宏宋玉鑫陈慧
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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