Pressure swing adsorption (PSA) is a technology used to separate carbon dioxide from biogas under pressure according to molecular characteristics and affinity for an
adsorbent material. It operates at near-ambient temperatures and differs significantly from cryogenic distillation techniques of gas separation. Specific adsorptive materials (e.g., zeolites,
Activated Carbon, molecular sieves, etc.) are used as a trap, preferentially adsorbing the target gas species at high pressure. The process then swings to low pressure to desorb the adsorbed material.
Absorbent Aside from their ability to discriminate between different gases, adsorbents for PSA systems are usually very porous materials chosen because of their large specific surface areas. Typical adsorbents are activated carbon, silica gel, alumina,
resin and zeolite. Though the gas adsorbed on these surfaces may consist of a layer only one or at most a few molecules thick, surface areas of several hundred square meters per gram enable the adsorption of a significant portion of the adsorbent's weight in gas. In addition to their selectivity for different gases, zeolites and some types of activated carbon called carbon molecular sieves may utilize their molecular sieve characteristics to exclude some gas molecules from their structure based on the size of the molecules, thereby restricting the ability of the larger molecules to be adsorbed.
Applications The primary applications of PSA is to remove carbon dioxide (CO
2) as the final step in the large-scale biogas project for the production of CH
4. The application of PSA to seperate carbon dioxide from biogas to increase the methane (CH
4) ratio is widely used in biogas engineering. Through PSA the biogas can be upgraded to a quality similar to natural gas. This includes a process in landfill gas utilization to upgrade landfill gas to utility-grade high purity methane gas to be sold as natural gas.
About Our Company
Shandong Mingshuo New Energy Technology Co., Ltd. is a service provider of environmental protection and new energy industry system. We committed into the comprehensive utilization of organic waste which includes biogas project and the equipment associated. The company is the production base of medium and large biogas equipments in China, the member of China Biogas Association, the member of China Association of Rural Energy Industry. The company is the recommended member of CCTV Website Enterprise Channel and China Import and Export Commodity Website, the most complete and excellent biogas equipments manufacturers in China. Mingshuo is a professional company integrating the scientific research, technological design, production and debugging service. The company specializes in the production of desulfurizer, desulfurization equipments and biogas equipments such as, Mingshuo MTZ biogas dedicated desulfurizer, MT ferric oxide desulfurizer, 889 Wet Desulfurization catalysts, water treatment agent, MS biogas dedicated desulfurization tanks, thioniers, biogas dedicated gas-water separators, assembled tanks, gas holders, positive-negative pressure protectors, biogas dedicated flame arresters, biogas boilers, deironing magnetic separation equipments, etc. We have established a comprehensive quality assurance process to ensure high-quality and tailored services. 
