Method for converting co2 into methane

A method for converting CO2 into methane, wherein:

• hydrogen is contacted with a gas feed comprising CO2 in at least one methanation reactor comprising a catalyst bed, at a temperature in the catalyst bed comprised between 160° C. and 550° C., at a pressure comprised between 0.1 MPa and 1 MPa, with a gas hourly space velocity comprised between 10 m3/kg/h and 50 m3/kg/h and with an H2/CO2 molar ratio comprised between 1 and 8;
• the catalyst comprises nickel metal deposited on a uranium oxide support of formula UO2+x, with x being between 0.01 and 0.6, the nickel metal mass content of the catalyst being between 5% and 40% relative to the total mass of the catalyst;
• and wherein:
• the catalyst is prepared by a method comprising the following steps a) to c):
• a) a support precursor consisting essentially of a uranium (IV) oxide, a uranium (VI) oxide or a mixture thereof is impregnated with a solution comprising a nickel precursor and a polar solvent;
• b) the impregnated support precursor is calcined in air and at a temperature of at least 250° C.;
• and
• c) the impregnated and calcined support precursor is reduced under hydrogen at a temperature of at least 300° C.