The zero gas generator components include an external oil-free air compressor, a pressure flow controller, a water removal system, SO2, NO, NO2, 03 and H2S removers, CO and hydrocarbon removers. Zero gas generator based on catalytic combustion reaction and molecular sieve adsorption filtration principle, remove SO2, NO, NO2, 03, H2S.cO, NH3, hydrocarbons, particles in the air, output dry and clean air.