1. Desulfurization methods for biogas and coal gas

The hydrogen sulfide in biogas originates from the hydrogen sulfide produced through biomass fermentation, while the sulfur in producer gas originates from the coal used for gasification, mainly existing in the form of H2S. About 80% of the sulfur in the coal used for gasification is converted into H2S and enters the gas. Assuming that the sulfur content of the coal used for gasification is 1%, approximately 2-3g/Nm3 of H2S will be formed and transferred into the gas after gasification. However, the sulfur content requirement for gas in industries such as ceramics and kaolin is 20-50mg/Nm3. If the H2S in the gas is burned and converted into SO2, the concentration will be around 2.6g/m3, which is significantly higher than the national emission concentration limit for SO2. Therefore, whether from the perspective of meeting environmental emission standards or improving product quality for enterprises, this part of H2S in the gas must be removed.

The desulfurization methods for gas can be generally divided into two types: dry desulfurization and wet desulfurization. Dry desulfurization methods, such as ferric oxide method and activated carbon method, are widely used, while wet desulfurization methods, such as modified ADA method, MSQ method, KCS method, chelated iron method, tannin extract method, and 888 method, are quite representative. In recent years, chelated iron desulfurization and biological desulfurization have gradually been promoted in small and medium-sized gas volumes.

2. Dry desulfurization technology

The application of dry desulfurization technology for coal gas began earlier. The dry desulfurization technology applied to coal gas is an iron oxide desulfurization technology using pyrite as the desulfurizing agent. Subsequently, with the successful research and relatively reduced production cost of activated carbon for coal gas desulfurization, activated carbon desulfurization technology has also been widely applied.

Business Scope

    Undertake the removal of hydrogen sulfide from various combustible gases such as generator gas, biogas, and coke oven gas, achieving environmental emission standards in one go!