Biogas Upgrading System for CNG LNG Natural Gas
Biogas is produced in many different environments, including in landfills, sewage sludge and during anaerobic degradation of organic material. Biogas is comprised of methane (CH4 , about 45-75% by volume), carbon dioxide (CO2 , 25-55%), and other compounds including hydrogen sulfide, water, and other trace gas compounds.
Methane is a powerful greenhouse gas if emitted into the atmosphere, but can also represent a valuable renewable energy source, with the potential to reduce GHG emissions when it is collected and substituted for fossil fuels. Biogas can be used directly to generate power, but the large volume of CO2 reduces the heating value of the gas, increasing compression and transportation costs and limiting economic feasibility to uses that occur at the point of production.
Purification allows for a wider variety of uses, either for heat and electricity, or for vehicle fuels. For use as a fuel, purification to remove carbon dioxide (CO2 ) and hydrogen sulfide (H2S) is required, because H2S corrodes vital mechanical components within engine generator sets and vehicle engines if it is not removed, and the large volume of CO2 reduces the heating value of the gas. By below several methods, the biogas can be upgraded to natural gas and used for CNG or LNG.
The features of amine scrubbing are to use a reagent that chemically binds to the CO2 molecule, removing it from the gas. This is most commonly performed using a water solution of amines (molecules with carbon and nitrogen), with the reaction product being either in the molecular or ion form. The most common amines used historically are methyldiethanolamine (MDEA), diethnolamine (DEA), monoethanolamine (MEA) and primarily activated MDEEA (aMDEA) which is a mixture of MDEA and piperazine.
The inlet raw biogas enters the absorber from the bottom and is set in contact with the amine solution. The CO2 content of the biogas reacts with the amine and is transferred to the solution. The spent amine solution is then led to the stripper where the CO 2 desorbs by regeneration with heat.
Process diagram for biogas upgrading with an amine scrubber
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
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