Preparation method of catalyst for reforming of methane and carbon dioxide to prepare syngas

Abstract

The invention provides a preparation method of a catalyst for reforming of methane and carbon dioxide to prepare syngas. The catalyst comprises an active component, a first auxiliary agent, a second auxiliary agent, and a carrier. The preparation method comprises the following steps: dissolving an active component precursor and a first auxiliary agent precursor into water to obtain a solution (A); then adding a carrier, carrying out aging, drying, and burning to obtain a catalyst precursor (B); reducing the catalyst precursor (B) in a reducing atmosphere; adding the reduced catalyst precursor (B) and a polyol solution into a reactor to carry out hydrogenation reactions, collecting the effluent, filtering, and drying to obtain a catalyst precursor (C); adding an active component precursor and a second auxiliary agent precursor into water to obtain a solution (D), then adding the catalyst precursor (C), drying, and burning to obtain the catalyst. The provided preparation method has the advantages that more active components are dispersed on the surface of carriers, the utilization rate of active metal is improved therefore, and at the same time, the methane conversion rate and product selectivity are both improved.

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

Images