Patent ID: 8313544

Claim:
A process for the synthetic generation of methane from a feed gas mixture, the process comprising the steps of: providing the feed gas mixture originating from a biomass gasification process, the feed gas mixture including carbon monoxide, hydrogen, water vapor, C 2 components and aromatic hydrocarbons, the aromatic hydrocarbons being in the range of 0.5 to 10 vol %, wherein said aromatic hydrocarbons are present in an amount of at least 0.4 g/Nm 3 , said feed gas further including benzene, naphthalene, toluene and C 8 hydrocarbons at a total concentration of about 15 g/Nm 3 ; bringing the feed gas mixture, without a pretreatment in an activated carbon filter, into contact with a fluidized bed catalyst having catalyst particles, having a catalytic active component including at least one of a metal, a metal compound or a mixture thereof under the conditions of: an elevated temperature in the range of 250 to 500° C.; a feed gas pressure in the range of 0.8 to 70 bar; a gas hourly space velocity of 1000 to 50000 h −1 ; and a mole ratio of H 2 /CO in the initial gas mixture in the range of 0.25 to 5 when the feed gas is brought into contact with the fluidized bed catalyst.