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A praseodymium-zirconium composite oxide cobalt-based catalyst for hydrogen production by autothermal reforming of acetic acid

A technology of composite oxides and cobalt-based catalysts, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical/physical processes, etc., can solve catalyst deactivation, poor stability, intolerance Sintering and other problems to achieve the effect of improving catalytic activity, promoting migration, and inhibiting the production of acetone

Active Publication Date: 2022-06-28
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The technical problem to be solved by the present invention is, aiming at the low activity, poor stability, high carbon deposition and poor sintering resistance of existing catalysts in the autothermal reforming reaction of acetic acid, To solve the problem of catalyst deactivation, provide a new catalyst with stable structure, sintering resistance, carbon deposition resistance and stable activity

Method used

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  • A praseodymium-zirconium composite oxide cobalt-based catalyst for hydrogen production by autothermal reforming of acetic acid
  • A praseodymium-zirconium composite oxide cobalt-based catalyst for hydrogen production by autothermal reforming of acetic acid
  • A praseodymium-zirconium composite oxide cobalt-based catalyst for hydrogen production by autothermal reforming of acetic acid

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Effect test

example 1

[0029] Weigh 7.972g of ZrO (NO 3 ) 2 ·2H 2 O, 2.921g of Co(NO 3 ) 2 ·6H 2 O, add 10ml deionized water to prepare solution #1; weigh 9.353g of citric acid in a 250ml beaker, add 10ml deionized water, stir and dissolve with a magnetic stirrer to prepare solution #2; citric acid solution # 2 Stir in a water bath at 70°C, slowly add nitrate solution #1 dropwise to the citric acid solution, and react for complexation for 0.5h; weigh 2.763g of ethylene glycol solution, slowly add it dropwise to the aforementioned mixed solution, maintain Stir in a water bath at 70 °C for 3 h to form a gel, place it in a drying oven at 105 °C for 12 h, and then calcinate at 750 °C for 4 h to obtain a CDUT-CZ catalyst. The molar composition of the catalyst is (ZrO 2 ) 0.68 (CoO1.5) 0.2 , the weight percentage composition is: zirconia is 84.9%, cobalt oxide is 15.1%.

[0030] The evaluation of acetic acid autothermal reforming reaction activity was carried out in a continuous flow fixed bed re...

Embodiment 1

[0033] Weigh 1.451g of Pr(NO 3 ) 3 ·6H 2 O, 6.939g of ZrO (NO 3 ) 2 ·2H 2 O and 2.921g of Co(NO 3 ) 2 ·6H 2 O, add 10ml deionized water to prepare solution #1; weigh 9.117g of citric acid in a 250ml beaker, add 10ml deionized water, stir and dissolve with a magnetic stirrer, prepare solution #2; put citric acid solution # 2 Stir in a water bath at 70°C, slowly add nitrate solution #1 dropwise to the citric acid solution, and react for complexation for 0.5h; weigh 2.693g of ethylene glycol solution, slowly add it dropwise to the aforementioned mixed solution, maintain Stir in a water bath at 70°C for 3h to form a gel, place it in a drying oven at 105°C for 12h, and then calcinate at 750°C for 4h to obtain Co containing spinel phase 3 O 4 and Pr-doped tetragonal ZrO 2 The Co-Zr-Pr-O composite oxide cobalt-based catalyst, namely CDUT-CZP-I catalyst, has a typical crystal structure of the oxide as shown in the appendix. figure 1 As shown, its pore structure characterist...

Embodiment 2

[0036] Weigh 2.810g of Pr(NO 3 ) 3 ·6H 2 O, 5.976g of ZrO (NO 3 ) 2 ·2H 2 O and 2.912g of Co(NO 3 ) 2 ·6H 2O, add 10ml deionized water to prepare solution #1; weigh 8.892g of citric acid in a 250ml beaker, add 10ml deionized water, stir and dissolve with a magnetic stirrer, prepare solution #2; citric acid solution # 2 Stir in a water bath at 70°C, slowly add nitrate solution #1 dropwise to the citric acid solution, and react for 0.5h; weigh 2.627g of ethylene glycol solution, slowly add it dropwise to the aforementioned mixed solution, maintain Stir in a water bath at 70°C for 3h to form a gel, place it in a drying oven at 105°C for 12h, and then calcinate at 750°C for 4h to obtain a Co containing spinel phase 3 O 4 and Pr-doped tetragonal ZrO 2 The Zr-Pr-O composite oxide cobalt-based catalyst, namely CDUT-CZP-II catalyst; the molar composition of the catalyst is (PrO 1.5 ) 0.12 (ZrO 2 ) 0.53 (CoO 1.5 ) 0.2 , the weight percent composition is: praseodymium ox...

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Abstract

The invention relates to a praseodymium-zirconium composite oxide cobalt-based catalyst for producing hydrogen by autothermal reforming of acetic acid. Aiming at the deactivation problems such as the change of catalyst structure, sintering and carbon deposition in the existing catalyst in the autothermal reforming reaction of acetic acid, the present invention adopts the sol-gel method to prepare Co 3 o 4 and Pr-doped t‑ZrO 2 The Zr-Pr-O composite oxide cobalt-based catalyst limits the aggregation of active components and the growth of grains, and significantly improves the catalyst's anti-coking, anti-sintering ability and hydrogen production rate. Catalyst chemical composition of the present invention is (PrO 1.5 ) a (ZrO 2 ) b (CoO 1.5 ) c , where a is 0‑0.19 and not 0, b is 0.43‑0.69, and c is 0.17‑0.21.

Description

technical field [0001] The invention relates to the application of a praseodymium zirconium composite oxide cobalt-based catalyst in the process of producing hydrogen by autothermal reforming of acetic acid, and belongs to the field of producing hydrogen by autothermal reforming of acetic acid. Background technique [0002] Hydrogen is a clean energy carrier and an important chemical raw material. At present, hydrogen is mainly obtained through the transformation of non-renewable fossil resources such as coal, oil and natural gas, resulting in a large amount of greenhouse gas emissions. As a renewable resource, biomass has the characteristics of abundant sources and environmental friendliness; biomass oil can be obtained by rapid pyrolysis, and the main component of the water phase component of bio-oil is acetic acid, which can be catalyzed by acetic acid, a biomass derivative Reforming large-scale production of cheap hydrogen. [0003] Usually, in the process of hydrogen ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B01J35/00B01J35/10C01B3/32
CPCB01J23/83C01B3/326C01B2203/0233C01B2203/0227B01J35/394B01J35/612B01J35/613B01J35/633B01J35/647
Inventor 黄利宏舒程宏刘燕丁晨宇
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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