A catalyst preparation method for methane carbon dioxide reforming to synthesis gas

Abstract

The invention relates to a catalyst preparation method for methane carbon dioxide reforming to produce synthesis gas. The catalyst includes an active component, an auxiliary agent and a carrier. The catalyst preparation method comprises: treating waste residue oil hydrogenation catalyst to prepare the catalyst before body A; then the catalyst precursor A is reduced using a reducing atmosphere; the reduced catalyst precursor A and polyol solution are added to the autoclave for hydrogenation reaction, and the reaction effluent is placed and then filtered and dried to obtain Catalyst precursor B: Dissolving the active component precursor and auxiliary agent precursor in water to obtain solution C, then adding catalyst precursor B, drying and roasting to obtain the catalyst. The method of the invention not only makes full use of the waste residue oil hydrotreating catalyst, saves costs, but also promotes the dispersion of more active components on the surface of the carrier, which not only improves the utilization rate of active metals, but also improves the conversion rate of methane and the product selectivity.

Description

technical field [0001] The invention relates to a method for preparing a catalyst for producing synthesis gas by reforming methane and carbon dioxide, in particular to a preparation method for a supported nickel-based catalyst for producing synthesis gas by reforming methane and carbon dioxide. 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 meta...

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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