Preparation method of nickel-based methane carbon dioxide reforming catalyst

Abstract

The invention discloses a preparation method of a nickel-based methane carbon dioxide reforming catalyst, which comprises the following steps: (1) mixing Ce (NO3) 3.6 H2O, Ni (NO3) 2.6 H2O and glycine, adding deionized water, and uniformly stirring to obtain a nitrate solution; (2) adding silica sol into the nitrate solution, and uniformly stirring to obtain mother liquor; (3) heating and evaporating the mother liquor to dryness until the sample is subjected to combustion reaction; and (4) calcining a product obtained after combustion to obtain the nickel-based methane carbon dioxide reformingcatalyst. According to the invention, NiO and CeO2 are loaded on the SiO2 carrier through a solution combustion method to prepare the high-dispersion Ni-CeO2 / SiO2 catalyst, and meanwhile, the high-dispersion Ni-CeO2 / SiO2 catalyst has good methane and carbon dioxide reforming activity, stability and carbon deposition resistance.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a preparation method of a nickel-based methane carbon dioxide reforming catalyst. Background technique [0002] methane carbon dioxide reforming reaction (CO 2 +CH 4 =2CO+2H 2 ) can convert two typical greenhouse gases, carbon dioxide and methane, into synthesis gas (CO and H 2 ), as a chemical raw material, synthesis gas is widely used in the chemical industry, so the research on methane carbon dioxide reforming reaction has attracted much attention in recent years. The development of catalysts with high activity, high selectivity and high stability is one of the key factors for the industrial application of methane carbon dioxide reforming reaction. [0003] In the carbon dioxide reforming process of methane, the catalysts mainly include two types of catalysts with noble metals (Pd, Pt, Rh, Ru, Ir) as active centers and non-noble metals (Fe, Co, Ni) as active c...

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Problems solved by technology

[0006] The present invention is to overcome the nickel-based catalyst with high dispersion and smaller particle size prepared by impregnation method or solid phase grinding method in the prior art, so as to improve the anti-coking ability of methane carbon dioxide reforming catalyst, but the smaller The particle size of nickel easily leads to the sintering deactivation of the catalyst in the high temperature reaction, so the activity of the high-dispersion nickel-based catalyst in the prior art is low at high temperature, which leads to the problem of low conversion rate of methane and carbon dioxide. A nickel-based catalyst is provided The preparation method of methane carbon dioxide reforming catalyst, by solution combustion method NiO and CeO 2 loaded on SiO 2 On the carrier, highly dispersed Ni-CeO was prepared 2 / SiO 2 Catalyst with good methane carbon dioxide reforming activity, stability and carbon deposition resistance

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