A kind of preparation method of synthetic gas methanation to produce natural gas catalyst

Abstract

The invention relates to a method for preparing a catalyst for preparation of natural gas by methanation of a synthetic gas, the catalyst comprises a first active component, a second active components, a first aid, a second aid and a carrier; the method for preparing the catalyst comprises the following steps: firstly, preparing a catalyst precursor B, then reducing the catalyst precursor B, mixing evenly a solution C and a furfural aqueous solution, adding the solution C, the furfural aqueous solution and the catalyst precursor B into a high-pressure reaction kettle, adding a solution D for reaction, processing and separating a solid and liquid mixture, filtering the obtained solid sample, drying and roasting to obtain the catalyst. The catalyst prepared by the method has high reaction activity, the metal use amount is reduced, and the selectivity of methane is improved.

Description

technical field [0001] The invention relates to a preparation method of a synthesis gas methanation to natural gas catalyst, in particular to a preparation method of synthesis gas methanation to natural gas supported molybdenum-based catalyst. Background technique [0002] Methanation refers to CO / CO 2 with H 2 Under certain temperature, pressure and catalyst action, generate CH 4 At present, this reaction is widely used in the removal of trace carbon in the synthesis of ammonia or hydrogen production, methanation of coke oven gas, and coal-to-natural gas. Methanation is an important catalytic technology, especially in fuel applications, where it can be used to increase the calorific value of gas, allowing the conversion of coke oven gas, coal or biomass to natural gas. In recent years, with the rapid development of my country's coal-based natural gas industry, methanation, one of the core technologies, has received more and more attention. [0003] China is a country ri...

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Problems solved by technology

[0006] Although the catalysts prepared by the above-mentioned patented methods have obtained better synthesis gas methanation reaction performance, because the reaction is a fast reaction (this kind of fast reaction is generally carried out under the condition of mass transfer control), the reactants in The reaction is completed when it 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 lower metal utilization in the carrier pores and increases the preparation cost of the catalyst

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