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Oxygen storage solid solution loaded cobalt-based catalyst for hydrogen production by autothermal reforming of acetic acid

A technology of cobalt-based catalyst and autothermal reforming, applied in hydrogen, inorganic chemistry, chemical instruments and methods, etc., can solve the problems of easy oxidation of active components, reduced catalyst activity, poor selectivity, etc., and achieve good oxygen storage capacity, Effects of inhibiting sintering and increasing fluidity

Inactive Publication Date: 2019-05-07
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 solve the problems of poor selectivity and instability of the catalyst in the existing autothermal reforming reaction of acetic acid, easy oxidation of active components, sintering and carbon deposition, which lead to reduced activity or even deactivation of the catalyst, and provides A new catalyst with stable structure, high conversion rate, good selectivity, anti-sintering and anti-oxidation

Method used

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  • Oxygen storage solid solution loaded cobalt-based catalyst for hydrogen production by autothermal reforming of acetic acid
  • Oxygen storage solid solution loaded cobalt-based catalyst for hydrogen production by autothermal reforming of acetic acid

Examples

Experimental program
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Effect test

example 1

[0027] Weigh 2.117g of Co(NO 3 ) 2 ·6H 2 O, 6.918g of Ce(NO 3 ) 3 ·6H 2 O, 1.419g of ZrO(NO 3 ) 2 2H 2 O, add 50mL of deionized water to make solution #1; weigh 11.139g of NaOH, add 200mL of deionized water to make solution #2; #1 and solution #2 were added dropwise into a beaker and kept stirring for co-precipitation reaction for 1 hour, and continued to stir and age for 18 hours; after the aging was completed, the mixture was suction filtered and washed 3 times, and the obtained precipitate was dried in a drying oven at 105°C for 18 hours to obtain Catalyst precursor; the precipitate was calcined at 700°C for 4 hours to obtain CDUT-CCZ-31 catalyst. The molar composition of the catalyst is (CoO 4 / 3 ) 1.46 (CeO 2 ) 3.00 (ZrO 2 ) 1.00 ; According to the weight percentage, the composition is: 15.1% of cobalt tetroxide, 67.9% of cerium dioxide, and 17.0% of zirconium dioxide.

[0028] The reactivity evaluation of autothermal reforming of acetic acid was carried out...

Embodiment 1

[0031] Weigh 2.110g of Co(NO 3 ) 2 ·6H 2 O, 4.997g of Ce(NO 3 ) 3 ·6H 2 O, 3.076g of ZrO(NO 3 ) 2 2H 2 O, add 50mL of deionized water to prepare solution #1; weigh 9.003g of NaOH, add 150mL of deionized water to prepare solution #2; follow-up steps are the same as reference example 1, and the precipitate is roasted at 700°C for 4 hours Finally, the CDUT-CCZ-11 catalyst was obtained, whose main components were oxygen storage solid solution (Ce-Zr-Ox) and highly dispersed Co 3 o 4 , the typical structure is shown in the X-ray diffraction pattern (attached figure 1 ), it also has a mesoporous structure, and the typical structure is shown in the attached figure 2 shown. The molar composition of the catalyst is (CoO 4 / 3 ) 0.68 (CeO 2 )(ZrO 2 ), according to the weight percent composition: tricobalt tetroxide is 15.1%, ceria is 48.5%, zirconium dioxide is 36.4%.

[0032] The activity of the CDUT-CCZ-11 catalyst was investigated by the autothermal reforming reaction ...

Embodiment 2

[0034] Weigh 2.117g of Co(NO 3 ) 2 ·6H 2 O, 2.723g of Ce(NO 3 ) 3 ·6H 2 O, 5.027g of ZrO(NO 3 ) 2 2H 2 O, add 50mL of deionized water to prepare solution #1; weigh 6.501g of NaOH, add 165mL of deionized water to prepare solution #2; follow-up steps are the same as reference example 1, and the precipitate is roasted at 700°C for 4 After hours, the CDUT-CCZ-13 catalyst was obtained, whose main components were oxygen storage solid solution (Ce-Zr-Ox) and highly dispersed Co 3 o 4 , the typical structure is shown in the X-ray diffraction pattern (attached figure 1 ), it also has a mesoporous structure, and the typical structure is shown in the attached figure 2 shown. The molar composition of the catalyst is (CoO 4 / 3 ) 0.15 (CeO 2 ) 1.00 (ZrO 2 ) 3.00 , according to the weight percent, the composition is: 15.0% of cobalt tetroxide, 26.1% of cerium dioxide, and 58.9% of zirconium dioxide.

[0035] The activity of the CDUT-CCZ-13 catalyst was investigated by the a...

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Abstract

The invention relates to an oxygen storage solid solution loaded cobalt-based catalyst for hydrogen production by autothermal reforming of acetic acid. Directed at the problems of oxidation, sinteringand carbon deposit of existing catalysts in the autothermal reforming process of acetic acid, the invention provides a new catalyst characterized by stable structure, sintering resistance, carbon deposition resistance, oxidation resistance and high activity. The molar composition of the catalyst is: (CoO4 / 3)a(CeO 2)b(ZrO2)c, wherein a is 0.68-1.46, b is 1.00-3.00, and c is 1.00-3.00. The invention adopts coprecipitation method to prepare a catalyst precursor, and then roasting is carried out to obtain the oxygen storage solid solution loaded cobalt-based catalyst containing Co3O4 and Ce-Zr-Ox. The catalyst provided by the invention effectively improves the yield of hydrogen and the stability of active components, and effectively inhibits the formation of methane, acetone and other by-products.

Description

technical field [0001] The invention relates to an oxygen storage solid solution loaded cobalt-based 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] As a clean energy, hydrogen energy has the advantages of diversified sources, high calorific value, renewable, safe, and wide application. Among the hydrogen production methods, biomass hydrogen production is one of the promising methods. Biomass is widely distributed and renewable, and the use of biomass to cleanly produce hydrogen is the future development trend. Compared with solid biomass, liquid biomass oil is more convenient for transportation and storage, and has a higher energy density; however, biomass oil has low density, relatively viscous, and relatively complex components, and relatively simple water is separated from biomass oil. The phase ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C01B3/32
Inventor 黄利宏代伶文王巧张羽刘燕杨季龙
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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