In general, the adsorbent must have a high degree of loose structure, large surface area exposed to, and can absorb large amounts of gas. The amount of gas adsorbed on nature, on the adsorbent and adsorbate on the adsorbent surface area and the gas temperature and pressure. A commonly used industrial waste gas treatment adsorbent is activated carbon, silica gel and activated alumina.

The activated carbon: hydrophobic, commonly used in the organic solvent in the air, purify SO2, NOX catalytic removal of malodorous substances in the exhaust; advantages: stable performance, corrosion resistance. Disadvantages: flammable, so use the temperature should not exceed 200 ℃, in an inert gas flow under cover, operating temperature up to 500℃.

②: hydrophilic silica gel, silica gel adsorption water quantity can reach its quality from the water 50%, but it is difficult to sorption of nonpolar substances. Gas are commonly used in the treatment of high moisture content and drying, hydrocarbon recovery.

The activated alumina: used for waste gas treatment, the dry gas such as: oil and gas desulfurization, fluorine-containing waste gas purification ( with strong adsorption capacity of water ).

The zeolite molecular sieve: is a kind of artificial synthetic zeolites, microporous type, with a cubic crystal silicate. Features: aperture uniform, so it has the screening performance, an ion adsorbent, the polar molecule, unsaturated organic compounds with selective adsorption ability.

The adsorption resin: initially for the condensation polymers, after a series of crosslinked copolymer. Macroporous adsorption resin in addition to the price is more expensive, more than activated carbon, physical and chemical properties of stability, variety, can be used in wastewater treatment, separation and purification of H2O2 vitamins