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Cobalt-cerium-manganese composite oxide catalyst for hydrogen production by autothermal reforming of acetic acid

A composite oxide, autothermal reforming technology, used in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, hydrogen/syngas production, etc., can solve the problem of catalyst deactivation, easy oxidation , not resistant to sintering and other problems, to achieve the effect of promoting migration, eliminating carbon deposits and improving selectivity

Active Publication Date: 2020-07-28
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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  • Cobalt-cerium-manganese composite oxide catalyst for hydrogen production by autothermal reforming of acetic acid
  • Cobalt-cerium-manganese composite oxide catalyst for hydrogen production by autothermal reforming of acetic acid

Examples

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Effect test

example 1

[0028] Weigh 1.547g of Co(NO 3 ) 2 ·6H 2 O, 6.081g of Ce(NO 3 ) 3 ·6H 2 O, 5.398g of 50% Mn(NO 3 ) 2 solution, add 35mL of deionized water to prepare solution #1; weigh 6.182g of NaOH and 1.024g of anhydrous Na 2 CO 3 , add 165mL 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 Aging for 18 hours; after the aging, the mixture was suction-filtered, the obtained precipitate was filtered out and washed repeatedly with deionized water until the pH reached 7.0, and the obtained precipitate was dried in a drying oven at 105°C for 12 hours to obtain a catalyst precursor. The resulting precursor was calcined at 600°C at a heating rate of 10°C / min in a tubular resistance furnace for 4 hours to obtain a CDUT-CCM-1 catalyst; the chemical composition of the catalyst was (CoO 1.5 ) a (CeO 2 ) b ...

Embodiment 1

[0032] Weigh 1.558g of Co(NO 3 ) 2 ·6H 2 O, 8.013g of Ce(NO 3 ) 3 ·6H 2 O, 1.915g of 50% Mn (NO 3 ) 2 solution, add 30mL of deionized water to prepare solution #1; weigh 7.618g of NaOH and 1.262g of anhydrous Na 2 CO 3 , adding 203mL of deionized water to make solution #2; the subsequent steps are the same as in Reference Example 1, and the obtained precipitate was calcined at 600°C for 4 hours to obtain the CDUT-CCM-2 catalyst, whose typical structure is shown in the XRD spectrum in the attached figure 1 As shown, its main component is Co-containing 3 o 4 and Mn species embedded in CeO 2 Structure Formed Composite Oxide Solid Solution Ce-Mn-O x , formed Co / Ce-Mn-O after reduction x Composite oxide solid solution catalyst; the typical pore size distribution of its mesoporous structure is shown in the attached figure 2 shown; the chemical composition of the catalyst is (CoO 1.5 ) a (CeO 2 ) b (MnO) c , where a is 0.18, b is 0.64, and c is 0.18; the weight per...

Embodiment 2

[0035] Weigh 3.123g of Co(NO 3 ) 2 ·6H 2 O, 17.150g of Ce(NO 3 ) 3 ·6H 2 O, 1.805g of 50% Mn (NO 3 ) 2 solution, add 56mL of deionized water to prepare solution #1; weigh 16.070g of NaOH and 2.662g of anhydrous Na 2 CO 3 , add 427mL of deionized water to prepare solution #2; the subsequent steps are the same as in Reference Example 1. After the obtained precipitate is calcined at 600°C for 4 hours, the composite oxide solid solution CDUT-CCM-3 catalyst is obtained. Its typical structure is shown in XRD spectrum The picture is attached figure 1 As shown, the typical pore size distribution of its mesoporous structure is shown in the attached figure 2 shown; the molar composition of the catalyst is (CoO 1.5 ) a (CeO 2 ) b (MnO) c , wherein a is 0.19, b is 0.72, and c is 0.09, and the weight percentage in terms of oxides is composed of: cobalt oxide is 10%, cerium oxide is 85%, and manganese oxide is 5%.

[0036] The activity of the obtained CDUT-CCM-3 catalyst was...

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Abstract

The invention relates to a cobalt-cerium-manganese composite oxide solid solution catalyst for hydrogen production by autothermal reforming of acetic acid. Aiming at the problem of catalyst deactivation of an existing catalyst in an acetic acid autothermal reforming reaction, the invention provides an efficient and stable new catalyst. The chemical component of the catalyst provided by the invention is (CoO1.5) a (CeO2) b (MnOx) c, wherein a is 0.15 to 0.19, b is 0.41 to 0.72, and c is 0.09 to 0.44. Co is used as an active component, Ce and Mn are introduced by adopting a coprecipitation method to form the Co / Ce-Mn-Ox composite oxide solid solution catalyst, generation of byproducts such as acetaldehyde and acetone in the reaction process is effectively inhibited, and the yield of hydrogenand the carbon deposition resistance, sintering resistance and oxidation resistance of the catalyst are improved.

Description

technical field [0001] The invention relates to the application of a cobalt-cerium-manganese composite oxide catalyst in hydrogen production by autothermal reforming of acetic acid, belonging to the field of hydrogen production by autothermal reforming of acetic acid. Background technique [0002] At present, most of the fuels used around the world are still fossil fuels, which has brought about environmental pollution problems. Hydrogen is considered as an important clean secondary energy 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 sustainably obtain hydrogen from nature. However, the energy density of biomass is low, so biomass is usually pyrolyzed into biomass oil with high energy density, easy storage and transportation. Biomass oil includes oil phase and water phase, and acetic acid is the main component of complex water phase products, so acetic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889C01B3/32
CPCB01J23/8892C01B3/326C01B2203/0244C01B2203/1052
Inventor 黄利宏张羽陈柏全刘燕胡晓敏
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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