Preparation method of high-temperature-resistant methanation catalyst

Abstract

The invention discloses a preparation method of a high-temperature-resistant methanation catalyst. The method comprises the following steps of firstly dissolving a soluble nickel salt and a soluble aluminum salt in deionized water, confecting to form a mixed solution, afterwards, adding a precipitator into the solution, carrying out a precipitation reaction in a condition that a temperature is 25to 90 DEG C, after the precipitation reaction is finished, adding a silicon reagent and hydrated alumina in sequence, uniformly agitating and mixing, then carrying out filtration, washing, drying andcalcination in sequence, finally, mixing graphite, and carrying out press forming to obtain a finished product of the methanation catalyst. The method provided by the invention is simple and novel; the methanation catalyst which is high in activity and high in strength is prepared; the nickel content in the catalyst is low; the preparation cost is low; however, the catalyst is high in activity andhigh in carbon deposition resisting ability, is stable in activity in a long-time use process and is not crushed and problems that an existing high-temperature-resistant methanation catalyst is easyto sinter in active component, is easy in carbon deposition to be inactivated and is easy to crush when being used for a long time are solved.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a preparation method of a high-temperature-resistant methanation catalyst. Background technique [0002] With the continuous development of my country's economy, the demand for energy is increasing. The remarkable feature of my country's energy structure is "rich in coal, poor in oil, and low in gas". Natural gas resources as a clean fuel are scarce, and a large amount of natural gas needs to be imported every year. It is estimated that by 2020, the demand for natural gas will exceed 300 billion m 3 , the market gap will reach 90 billion m 3 . Therefore, the development of coal-to-gas can not only alleviate the serious environmental pollution problem in my country, but also alleviate the shortage of natural gas supply in my country and improve the energy structure. [0003] The core process for developing coal-to-gas is the methanation process, and th...

AI Technical Summary

Problems solved by technology

The preparation method is simple and novel, and a methanation catalyst with high activity and high strength is prepared. The nickel content in the catalyst is low, and the preparation cost is low, but the catalyst has high activity, strong anti-coking ability, stable activity during long-term use, and is not broken. It solves the problems that the active components of the existing high-temperature methanation catalysts are easy to sinter, easy to deactivate due to carbon deposition, and easy to break after long-term use

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