Biogas membrane purification
Biogas contains carbon dioxide in the range of 35-45 vol%. Upgrading biogas to biomethane is primarily based on carbon dioxide removal. Biomethane is essentially purified biogas that contains at least 95 vol% methane and it can be either used as fuel for vehicles running on compressed natural gas (CNG) or injected into the natural gas grid.
Biogas upgrading using membrane technology uses the fact that gases have different permeability through a membrane fiber. During separation of carbon dioxide and methane in biogas upgrading, polymeric hollow fiber membranes are used. The membrane fibers on the market are continuously improved to gain better selectivity and higher permeability to achieve better separation and lower methane slip. Also, to increase the methane concentration in the product gas, several membrane stages are usually used in sequence. To acquire lower methane slip, a third membrane stage may be added in the permeate.
Nowadays, various techniques are used for CO2 removal from biogas. Among the most commonly used technologies are adsorption, absorption, cryogenic separation, and membrane separation. Membrane separations are particularly appealing for biogas upgrading due to their lower energy consumption, good selectivity, easily engineered modules, and therefore lower costs. High CH4 recovery efficiency can be reached (>95%), while pure CO2 can be obtained. This technology for biogas upgrading is based on gas dissolution and diffusion into polymer materials (membranes). When a differential pressure is applied on opposing sides of a polymer lm, gas transport across the lm (permeation) occurs. The gas rate of permeation is controlled by the solubility coefficient and diffusion coefficient of the gas-membrane system.
Different process configurations in biogas upgrading with membranes: (i) one stage, (ii) two stages, (iii) three stages
Note: Each system is customized to accommodate the client's wishes and external factors.
Management System Certification: ISO9001:2008, ISO14001:2004, OHSAS18001:2007
Company Introduction:
Shandong Mingshuo New Energy Technology Co., Ltd. Specializes in biogas project. 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.
Contact: Emma Luan
Tel/Fax: +86 532 8576 2582
Phone: +86 176 6023 9752
Manufacturer & Supplier for Biogas Plant, Desulfurization System, Organic Waste Treatment Equipment etc.
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