Nickel-magnesium-chromium composite oxide catalyst for auto-thermal reforming of acetic acid to produce hydrogen

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 To achieve the effect of improving catalytic activity, promoting dehydrogenation process and oxidation process, and promoting gasification conversion process

Active Publication Date: 2018-12-04
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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  • Nickel-magnesium-chromium composite oxide catalyst for auto-thermal reforming of acetic acid to produce hydrogen
  • Nickel-magnesium-chromium composite oxide catalyst for auto-thermal reforming of acetic acid to produce hydrogen
  • Nickel-magnesium-chromium composite oxide catalyst for auto-thermal reforming of acetic acid to produce hydrogen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 8.903g 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 73.60 ml of deionized water to make solution #1. Weigh 9.427g NaOH and 1.610g Na 2 CO 3 , Add 250ml of deionized water to make solution #2. The subsequent steps are the same as in Reference Example 1, and a typical structure is obtained as attached figure 1 MgCr-containing 2 O 4 And NiCr 2 O 4 Spinel structure and Mg-Ni-Cr-O solid solution, as attached figure 2 The shown pore size distribution is mainly concentrated in the mesoporous composite oxide CUT-NMC-201 catalyst in the range of 10-20 nm. The weight composition of the catalyst is as follows: nickel oxide content is 14.9%, magnesium oxide is 55.1%, and chromium oxide is 30.0%.

[0031] The activity of the catalyst CUT-NMC-201 has been investigated by the autothermal reforming of acetic acid. When the reaction conditions are normal pressure, space velocity 30000ml / (g-catalyst·h), reaction temperature is 700°C, raw g...

Embodiment 2

[0033] Accurately weigh 8.566g 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 75.00 ml of deionized water to make solution #1. Weigh accurately 9.681g NaOH and 1.603g Na 2 CO 3 , Add 225ml of deionized water to make solution #2. The subsequent steps are the same as in Reference Example 1, and a typical structure is obtained as attached figure 1 Shown and attached figure 2 MgCr-containing 2 O 4 And NiCr 2 O 4 The mesoporous composite oxide catalyst CUT-MNC-301 with spinel structure and Mg-Ni-Cr-O solid solution with pore size distribution concentrated in the range of 10-20nm. The weight composition of the catalyst is as follows: nickel oxide content is 14.9%, magnesium oxide is 50.1%, and chromium oxide is 35.0%.

[0034] The activity of the catalyst CUT-NMC-301 has been investigated by the autothermal reforming of acetic acid. The reaction conditions are atmospheric pressure, space velocity 30000ml / (g-catalyst·h), reaction temperature ...

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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. The production of hydrogen is mainly made from natural gas, alcohols, biomass oil, etc., through steam reforming, partial oxidation reaction, 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 ...

Claims

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Application Information

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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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