Method of purifying and extracting methane in waste landfill gas

Purification concentrate FIELD The present invention LFG, relates to a sulfur-tolerant catalytic deoxygenation method for purifying core of methane, particularly methane, landfill gas as a method of purifying waste concentrate, the method comprising the steps of : (1) a compression step of landfill gas; (2) TSA process; (3) sulfur-tolerant catalytic deoxygenation step; (4) acid gas removal step; (5) step concentrate. Acid gas removal step can be selected pressure swing adsorption (PSA), washed with caustic, or LT methanol MDEA, the CO2 gas removed, SO2 and most of H2S; concentrate the methane step is a concentrated nitrogen components separated . The present invention solves the landfill gas sulfur tolerant catalytic deoxygenation problem, can contain various impurities processing landfill gas, having a methane yield, means stable, high reliability, high thermal efficiency advantage, to industrial exhaust gas recycling, energy conservation, turning waste into effect.