Supported Ni/W-ZrO2 catalyst for hydrogen production by autothermal reforming of acetic acid

An autothermal reforming and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, hydrogen and other directions, can solve the problems of poor thermal stability of catalyst structure, catalyst deactivation, etc. Effects of suppressing carbon deposition, promoting gasification, and high thermal stability

Pending Publication Date: 2022-08-09
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The problem to be solved by the present invention is: for existing catalysts in the process of acetic acid autothermal reforming hydrogen production, the thermal stability of the catalyst structure is poor, and the problems of catalyst deactivation caused by easy oxidation, sintering and carbon deposition, etc., the present invention provides A new catalyst with stable structure, anti-coking, anti-oxidation and anti-sintering

Method used

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  • Supported Ni/W-ZrO2 catalyst for hydrogen production by autothermal reforming of acetic acid
  • Supported Ni/W-ZrO2 catalyst for hydrogen production by autothermal reforming of acetic acid

Examples

Experimental program
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Effect test

example 1

[0024] Weigh 2.336g nickel nitrate hexahydrate and 6.381g zirconium oxynitrate dihydrate respectively, dissolve in water to form mixed nitric acid solution 1#; respectively weigh 2.212g ethylene glycol and 7.487g citric acid monohydrate, dissolve in water to form mixed solution 2 #; Mix 1# and 2# and heat in a water bath at 60°C, stir for 3-4 hours, until gel is formed, place it in a drying oven, and dry it at 105°C until the sample swells; put the dried The sample was placed in a tube furnace, heated from room temperature to 750°C at a rate of 10°C / min, and kept calcined for 4 hours to obtain a CDUT-NZ catalyst. The catalyst, in terms of the weight percent of oxides, was composed of: nickel oxide NiO 15.0%, zirconium dioxide ZrO 2 is 85.0%.

[0025] The evaluation of acetic acid autothermal reforming reaction activity was carried out in a continuous flow fixed bed reactor. The catalyst is ground and tableted, then sieved into 20-40 mesh particles, 0.1-0.2 g is weighed into ...

Embodiment 1

[0028] Weigh 2.336g nickel nitrate hexahydrate, 6.231g zirconium oxynitrate dihydrate and 1.024g ammonium tungstate respectively, dissolve in water to form mixed nitric acid solution 1#; respectively weigh 2.193g ethylene glycol and 7.423g citric acid monohydrate, dissolve Form mixed solution 2# in water; mix 1# and 2#, heat in a water bath at 60°C, stir for 3-4 hours, until gel is formed, place it in a drying box, and dry it at 105°C until The sample was expanded; the dried sample was placed in a tube furnace, heated from room temperature to 750 °C at a rate of 10 °C / min, and kept calcined for 4 hours to obtain the CDUT-NWZ-1 catalyst, which formed a catalyst supported on t-ZrO 2 / m-ZrO 2 Mesoporous Ni / W-ZrO with Ni-W-Zr-O Active Centers on Composite Phase 2 catalyst, whose typical crystal structure is shown in figure 1 shows that NiO is highly dispersed in t-ZrO 2 / m-ZrO 2 Compound ZrO 2 The crystal structure of the crystal phase forms the Ni-W-Zr-O active center; the t...

Embodiment 2

[0031] Weigh 2.337g nickel nitrate hexahydrate, 6.006g zirconium oxynitrate dihydrate and 2.548g ammonium tungstate respectively, dissolve in water to form mixed nitric acid solution 1#; respectively weigh 2.164g ethylene glycol and 7.328g citric acid monohydrate, dissolve Form mixed solution 2# in water; mix 1# and 2#, heat in a water bath at 60°C, stir for 3-4 hours, until gel is formed, place it in a drying box, and dry it at 105°C until The sample expanded; the dried sample was placed in a tube furnace, heated from room temperature to 750 °C at a rate of 10 °C / min, and kept calcined for 4 hours to obtain CDUT-NWZ-2 catalyst, which formed a catalyst supported on t-ZrO 2 / m-ZrO 2 Mesoporous Ni / W-ZrO with Ni-W-Zr-O Active Centers on Composite Phase 2 catalyst. The weight percentage of the catalyst in terms of oxides is as follows: nickel oxide NiO is 15.0%, zirconium oxide ZrO 2 80.0%, tungsten oxide WO 3 is 5.0%.

[0032] The catalyst CDUT-NWZ-2 was investigated for the...

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Abstract

Aiming at the problems that an existing catalyst is poor in stability and prone to inactivation in the acetic acid autothermal reforming hydrogen production process, the Ni / W-ZrO2 catalyst is prepared through sol-gel, and the Ni / W-ZrO2 composite oxide catalyst which is loaded by a monoclinic phase and tetragonal phase composite crystal phase t-ZrO2 / m-ZrO2 and forms a Ni-W-Zr-O active center is obtained. The activity and the stability of the acetic acid autothermal reforming hydrogen production reaction are effectively improved. The molar composition of the catalyst in terms of oxide is (NiO) a (WO3) b (ZrO2) c, a is equal to 0.23-0.35, b is equal to 0-0.65 and not equal to 0, and c is equal to 0-0.77 and not equal to 0; the ceramic comprises the following components in percentage by weight: 15.0% of nickel oxide, 0-85.0% (not 0) of tungsten oxide and 0-85% (not 0) of zirconium oxide.

Description

technical field [0001] The present invention relates to supported Ni / W-ZrO 2 The application of the catalyst in the process of producing hydrogen by autothermal reforming of acetic acid belongs to the field of producing hydrogen by autothermal reforming of acetic acid. Background technique [0002] Hydrogen is a kind of clean energy with a wide range of sources and various forms of utilization, and has received extensive attention from the world. Biomass is obtained by high temperature pyrolysis to obtain biomass oil, and then through catalytic reforming reaction, the biomass oil is catalytically converted into hydrogen, which is an effective way to produce hydrogen energy on a large scale. In the water phase components of biomass oil, acetic acid accounts for up to one-third. Therefore, using acetic acid as a raw material for hydrogen production derived from biomass oil to produce hydrogen through catalytic reforming is a low-cost and reliable method. Sustained hydrogen p...

Claims

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Application Information

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IPC IPC(8): B01J23/888B01J35/10C01B3/32
CPCB01J23/888C01B3/32B01J35/61Y02P20/52
Inventor 黄利宏程鹏陈慧
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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