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A nickel-magnesium-chromium composite oxide catalyst for hydrogen production by autothermal reforming of acetic acid

A composite oxide and autothermal reforming technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, heterogeneous catalyst chemical elements, etc., can solve carbon deposition and catalyst deactivation and other problems, to achieve the effect of improving catalytic activity, promoting dehydrogenation process and oxidation process, and improving reducibility

Active Publication Date: 2019-05-03
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a structurally stable , anti-sintering, anti-coking, anti-oxidation, new catalyst with stable activity

Method used

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  • A nickel-magnesium-chromium composite oxide catalyst for hydrogen production by autothermal reforming of acetic acid
  • A nickel-magnesium-chromium composite oxide catalyst for hydrogen production by autothermal reforming of acetic acid
  • A nickel-magnesium-chromium composite oxide catalyst for hydrogen production by autothermal reforming of acetic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 8.903g of Cr(NO 3 ) 3 9H 2 , 11.411g of Mg (NO 3 ) 2 ·6H 2 O and 2.005g of Ni(NO 3 ) 2 .6H 2 O, add 73.60ml of deionized water to make solution #1. Accurately weigh 9.427g of NaOH and 1.610g of Na 2 CO 3 , was added to 250ml of deionized water to prepare solution #2. Subsequent steps are the same as in reference example 1, obtain a typical structure such as attached figure 1 Containing MgCr shown 2 o 4 and NiCr 2 o 4 Spinel structure and Mg-Ni-Cr-O solid solution, such as attached figure 2 The shown pore size distribution is mainly concentrated in the range of 10–20 nm for the mesoporous composite oxide CUT-NMC-201 catalyst. The weight composition of the catalyst is as follows: the nickel oxide content is 14.9%, the magnesium oxide content is 55.1%, and the chromium oxide content is 30.0%.

[0031] The catalyst CUT-NMC-201 has been tested on the activity of acetic acid autothermal reforming. When the reaction conditions are normal pressure, space...

Embodiment 2

[0033] Accurately weigh 8.566g of Cr(NO 3 ) 3 9H 2 O, 12.484g of Mg(NO 3 ) 2 ·6H 2 O and 2.336g of Ni(NO 3 ) 2 .6H 2 O, add 75.00ml of deionized water to make solution #1. Accurately weigh 9.681g of NaOH and 1.603g of Na 2 CO 3 , was added to 225ml of deionized water to prepare solution #2. Subsequent steps are the same as in reference example 1, obtain a typical structure such as attached figure 1 shown and attached figure 2 Containing MgCr shown 2 o 4 and NiCr 2 o 4 Mesoporous composite oxide catalyst CUT-MNC-301 with spinel structure and Mg-Ni-Cr-O solid solution and pore size distribution concentrated in the range of 10-20nm. The weight composition of the catalyst is as follows: the nickel oxide content is 14.9%, the magnesium oxide content is 50.1%, and the chromium oxide content is 35.0%.

[0034] The catalyst CUT-NMC-301 was investigated by the autothermal reforming activity of acetic acid. The reaction conditions were normal pressure, space velocity 3...

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Abstract

The invention relates to a nickel-magnesium-chromium mesoporous composite oxide catalyst for auto-thermal reforming of acetic acid to produce hydrogen. The invention aims to solve the problem that inthe prior art, during the acetic acid auto-thermal reforming process, the structure of a conventional catalyst changes, the active components are oxidized and sintered, and thus the catalyst is deactivated, and provides a novel catalyst having the advantages of stable structure, sintering resistance, carbon deposition resistance, oxidation resistance and high activity. The chemical formula of thecatalyst is (NiO)a(MgO)b(CrO1.5)c; wherein a is 0.08-0.12, b is 0.55-0.92, c is 0-0.33, and nickel oxide accounts for 12.0 to 20.0 wt.% of the catalyst, magnesium oxide accounts for 40.0 to 88.0 wt.%of the catalyst, and chromium oxide accounts for 0 to 40.0 wt.% of the catalyst. A catalyst precursor is prepared by a co-precipitation method, chromium is introduced into the catalyst and is taken asan auxiliary agent; after burning, a stable mesoporous composite oxide catalyst, which comprises a MgCr2O4 and NiCr2O4 spinel structure and a Mg-Ni-Cr-O solid solution, is formed; the reducing performance and stability of the active components are enhanced; at the same time, the hydrogen yield of acetic acid auto-thermal reforming, sintering resistant performance, and carbon deposition resistantperformance are all strengthened.

Description

technical field [0001] The invention relates to a nickel-magnesium-chromium mesoporous composite oxide 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] Hydrogen is a clean energy carrier. Compared with traditional primary energy, it has the advantages of high calorific value and abundant reserves. Hydrogen is mainly produced from natural gas, alcohols, and biomass oil through steam reforming, partial oxidation, and autothermal reforming. From the perspective of the principles, processes and production efficiency of various existing hydrogen production technologies, in order to effectively control the emission of pollutants in the hydrogen production process and reduce costs, the main development direction of hydrogen production is to use clean, cheap and easily available renewable Large-scale and dist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/86C01B3/32
CPCB01J23/002B01J23/866B01J2523/00C01B3/323B01J2523/22B01J2523/847B01J2523/67
Inventor 黄利宏谢星月杨季龙李辉谷贾玄弈
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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