A kind of preparation method of synthesis gas catalyst for carbon dioxide reforming of methane

Abstract

The invention provides a method for preparing a catalyst for reforming methane and carbon dioxide to synthesize gas. The catalyst includes an active component, a first auxiliary agent, a second auxiliary agent and a carrier. In the preparation method, the active component precursor and the second auxiliary agent are first prepared. An auxiliary agent precursor is dissolved in water to obtain a solution A; then a carrier is added to obtain a catalyst precursor B after aging, drying, and roasting; a reducing atmosphere is used to reduce the catalyst precursor B; the reduced catalyst precursor B and the polyol solution are added to the reactor for hydrogenation reaction, the reaction effluent is placed, then filtered and dried to obtain the catalyst precursor C; the active component precursor and the second auxiliary agent precursor are dissolved in water to obtain the solution D , and then add the catalyst precursor C, after drying and roasting, the catalyst is obtained. The method of the invention promotes the dispersion of more active components on the carrier surface, not only improves the utilization rate of active metals, but also improves the conversion rate of methane and the selectivity of products.

Description

technical field [0001] The invention relates to a preparation method of a catalyst for producing synthesis gas by methane carbon dioxide reforming, in particular to a preparation method for a supported nickel-based catalyst for producing synthesis gas by methane carbon dioxide reforming. Background technique [0002] Methane and carbon dioxide are cheap and resource-rich carbon-containing compounds in nature. Using the reforming reaction of methane and carbon dioxide to produce synthesis gas is of great significance for alleviating the energy crisis and reducing global warming caused by greenhouse gas emissions . The synthesis gas produced by the reforming of methane and carbon dioxide has H 2 The characteristic of / CO≤1 can be applied to Fischer-Tropsch synthesis to produce high value-added chemicals such as higher hydrocarbons. [0003] At present, the catalysts used for the reforming of methane and carbon dioxide to produce synthesis gas are mainly supported metal catal...

AI Technical Summary

Problems solved by technology

The reaction life of the obtained catalyst is longer, but the preparation process of this method is complicated and the cost is higher

[0007] Although the catalysts prepared by the above-mentioned patented methods have obtained better reaction performance of methane carbon dioxide reforming to synthesis gas, the catalysts all have the problem of high cost, and the reaction of methane carbon dioxide reforming to synthesis gas is still a fast reaction (this kind The rapid reaction is generally carried out under the condition of mass transfer control), and the reaction is completed when the reactant reaches the outer surface of the catalyst, so the inner surface of the catalyst does not contribute much to the target reaction, which results in a lower The metal utilization rate increases the cost of the catalyst, and at the same time accelerates the deep oxidation of the product

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