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Strontium-promoted cobalt-based composite oxide catalysts for hydrogen production by autothermal reforming of acetic acid

A cobalt-based catalyst and autothermal reforming technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical elements of heterogeneous catalysts, etc., can solve the problem of carbon deposition and catalyst deactivation And other issues

Active Publication Date: 2020-10-30
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 structurally stable , Anti-coking, anti-sintering, anti-oxidation, new catalyst with stable activity

Method used

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  • Strontium-promoted cobalt-based composite oxide catalysts for hydrogen production by autothermal reforming of acetic acid
  • Strontium-promoted cobalt-based composite oxide catalysts for hydrogen production by autothermal reforming of acetic acid

Examples

Experimental program
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Effect test

example 1

[0026] Weigh 3.574g of Sr(NO 3 ) 2 , 2.949g of Co(NO 3 ) 2 ·6H 2 O and 6.283g of Ce(NO 3 ) 3 ·6H 2 O, add 20.0mL of deionized water to prepare a mixed solution; weigh 1.802g of anhydrous glucose, dissolve it in 100mL of deionized water, and prepare a 0.1mol / L glucose solution, and weigh 8.719g of citric acid to prepare a solution ; Add citric acid and 10mL glucose solution to the nitrate mixed solution in turn, stir well; add ammonia water (28wt.%) solution dropwise, adjust the pH value of the mixed solution to about 4.2, and keep stirring for 1-2h, The solution was diluted to a total volume of 100.0mL, transferred to a 100mL autoclave, and placed in an oven at 170°C for hydrothermal treatment for 20h; after the reaction, when the autoclave was naturally cooled to room temperature, the resulting mixture was suction filtered and the precipitate was washed to neutral, and then dried in an oven at 105°C for 12 hours to obtain a catalyst precursor; the dried sample was calc...

Embodiment 1

[0030] Weigh 1.336g of Sr(NO 3 ) 2 , 2.917g of Co(NO 3 ) 2 ·6H 2 O and 9.133g of Ce(NO 3 ) 3 ·6H 2 O, add 20.0mL of deionized water to prepare a mixed solution; weigh 1.802g of anhydrous glucose, dissolve it in 100mL of deionized water to prepare a 0.1mol / L glucose solution, and weigh 7.781g of citric acid to prepare a solution ; Add citric acid and 10mL glucose solution to the nitrate mixed solution successively, and stir evenly; Subsequent steps are the same as in Reference Example 1 to obtain the catalyst precursor, and after roasting, a strontium-promoted cobalt-based catalyst supported by cerium oxide is obtained. structure as attached figure 1 As shown, the catalyst presents ceria crystals as the skeleton, strontium oxide enters ceria in an amorphous form to form a Sr-Co-O solid solution, and contains a small amount of spinel phase of tricobalt tetroxide, which is highly dispersed on the solid solution. The pore size distribution of its typical mesoporous structu...

Embodiment 2

[0033] Weigh 2.378g of Sr(NO 3 ) 2 , 2.878g of Co(NO 3 ) 2 ·6H 2 O and 7.805g of Ce(NO 3 ) 3 ·6H 2 O, add 20.0mL of deionized water to prepare a mixed solution; weigh 1.802g of anhydrous glucose, dissolve it in 100mL of deionized water to prepare a 0.1mol / L glucose solution, and weigh 8.218g of citric acid to prepare solution; citric acid and 10mL glucose solution were added successively to the nitrate mixed solution, and stirred evenly; the subsequent steps were the same as in Reference Example 1 to obtain the catalyst precursor, and after roasting, the strontium-promoted cobalt-based catalyst supported by ceria was obtained, namely Obtain CDUT-SCC-103 catalyst, the chemical composition of this catalyst is (SrO) 1.25 (CoO 1.5 ) 1.10 (CeO 2 ) 2.00 , The weight percentage is the composition: strontium oxide is 23.3%, cobalt oxide is 14.8%, and cerium oxide is 61.9%.

[0034] The catalyst CDUT-SCC-103 was investigated for its activity in the autothermal reforming of ...

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Abstract

The invention relates to a cerium dioxide-loaded strontium-promoted cobalt-based composite oxide catalyst for hydrogen production by autothermal reforming of acetic acid. The invention provides a novel catalyst which is stable in structure and high in activity in order to solve the problem that an existing catalyst is inactivated in an acetic acid autothermal reforming reaction. The molar composition of the catalyst is (SrO) a (CoO1.5) b (CeO2) c, wherein a ranges from 0.75 to 1.75, b ranges from 1.05 to 1.15, and c ranges from 1.50 to 2.50. According to the invention, Co is used as an activecomponent; the cerium dioxide-loaded strontium-promoted cobalt-based composite oxide is prepared by adopting a hydrothermal synthesis method; according to the catalyst, cerium dioxide is used as a skeleton, the catalyst contains a small amount of cobaltosic oxide spinel phase, and the Sr-Co-Ce-O mesoporous composite oxide solid solution catalyst is formed; possible migration, aggregation and sintering of an active component cobalt under a high-temperature condition are effectively inhibited, and the hydrogen yield, sintering resistance and carbon deposition resistance in the acetic acid autothermal reforming process are improved.

Description

technical field [0001] The invention relates to a strontium-promoted cobalt-based composite oxide catalyst for hydrogen production by autothermal reforming of acetic acid, belonging to the field of hydrogen production by autothermal reforming of acetic acid. Background technique [0002] Hydrogen is renewable and has high energy density. It is not only an excellent energy carrier, but also a clean secondary energy source. At present, hydrogen mainly comes from fossil fuels such as natural gas, coal and alkanes, but this preparation method will pollute the environment, especially the released carbon dioxide gas will aggravate the greenhouse effect. Therefore, it is particularly important to seek a clean and renewable hydrogen production method. Biomass is a kind of renewable energy, which is abundant in my country. The production of hydrogen from biomass can reduce environmental pollution and reduce dependence on fossil fuels. Biomass hydrogen production can use thermochemi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C01B3/32
CPCB01J23/002B01J23/83B01J2523/00C01B3/326C01B2203/0244C01B2203/1052B01J2523/3712B01J2523/845B01J2523/24
Inventor 黄利宏刘燕张羽胡晓敏
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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