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.