Biomass gas, such as landfill gas and biogas, refers to the methane-containing gas mixture produced in the anaerobic digestion process of the bacteria decomposing various organic substances (municipal garbage, straw, agricultural waste, feces, kitchen waste, etc.), and belongs to renewable natural gas (RNG). The content of methane in biomass gas is 40-70vol%, and in addition, it mainly contains CO₂ (20-40 vol%), a small amount of N₂, O₂, sulfide and trace impurities such as VOCs, NH₃ and siloxane.

Compared with conventional natural gas, biomass gas such as landfill gas and biogas has lower methane content and needs to be further purified for utilization. According to the composition conditions of biomass gas, DKT has developed a complete set of methane purification technologies, including pretreatment and impurity removal by adsorption, dry fine desulfurization and CO₂/N₂/O₂ removal by PSA. The obtained methane product gas can directly enter the gas pipeline network, or can be further compressed into CNG or liquefied into LNG product, which can be used as the fuel for various transport vehicles such as garbage trucks, heavy trucks, farm vehicles and cars.

Technical features and advantages:

- Advanced and proven technology, simple process flow, and stable and reliable operation;

- High purity and recovery of methane product;

- Low energy consumption in operation and highly automated;

- Low operation cost and high economic benefit.

Application:

- Purification of carbon monoxide in semi-water gas, water gas, regeneration gas from copper washing of synthetic ammonia, blast furnace gas, converter gas, calcium carbide furnace gas, carbon black furnace gas and yellow phosphorus tail gas;

- Purification of methane from biomass gas such as landfill gas and biogas.