Method for producing methane by catalytic gasification of coal and device thereof

摘要

A gasifier including synthesis gas producing zone, coal methanation zone and synthesis gas methanation zone in turns from the bottom to the top is provided. A method for producing methane by catalytic gasification of coal using this gasifier is also provided. Optionally, the gasifier may also contain a coal pyrolyzing zone above the synthesis gas methanation zone.