tailieunhanh - Cryogenic biogas enrichment method for use as a vehicle fuel

Energy content of biogas is directly proportional to the methane concentration thus, removing impurities increases the energy content of the gas so that it can be used as vehicle fuel or pooled into gas grid. Removing impurities is regarded as biogas upgrading, in doing so, cryogenic method is among different enrichment methods. Cryogenic method involves the subsequent compression and expansion of biogas until the suitable pressure and temperature is attained (in other words until the required purity is attained). With this method the suitable temperature and pressure to remove CO2 and H2S are calculated to be 215K and 1MPa respectively. At this point while CO2 and H2S are in their liquid state, CH4 exists in its gaseous state. Under these conditions, CO2 and H2S are removed from the system under the action of gravity. The minimum work done to compress the gas is . | 2019 8 5 683-687 EXCELLENT PUBLISHERS InternationalJournal ofCurrent Microbiology andAppliedSciences ISSN 2319-7706 Volume 8 Number 05 2019 Journal homepage http Original Research Article https Cryogenic Biogas Enrichment Method for Use as a Vehicle Fuel . Tesfit . Mahtem and . Joejoe Department of Agricultural Engineering Hamelmalo Agricultural College Corresponding author ABSTRACT Keywords Biogas Biogas upgrading Cryogenic method Compression Expansion Bioreactor Article Info Accepted 10 April 2019 Available Online 10 May 2019 Energy content of biogas is directly proportional to the methane concentration thus removing impurities increases the energy content of the gas so that it can be used as vehicle fuel or pooled into gas grid. Removing impurities is regarded as biogas upgrading in doing so cryogenic method is among different enrichment methods. Cryogenic method involves the subsequent compression and expansion of biogas until the suitable pressure and temperature is attained in other words until the required purity is attained . With this method the suitable temperature and pressure to remove CO2 and H2S are calculated to be 215K and 1MPa respectively. At this point while CO2 and H2S are in their liquid state CH4 exists in its gaseous state. Under these conditions CO2 and H2S are removed from the system under the action of gravity. The minimum work done to compress the gas is kg. Introduction The process of gas production from anaerobic degradation of organic substrates namely manure sewage sludge organic household leftovers and industrial wastes is regarded as biogas production Deublein and Steinhauser 2008 . The production of biogas and its efficient utilization would meet the fuel and energy demand Kruczynski et al. 2012 . Biogas released from reactors consists of varieties of impurities that reduce the efficiency of the gas and also causes adverse effects on the

• Cơ khí - Chế tạo máy
• Cryogenic biogas enrichment method
• Vehicle fuel
• Biogas upgrading
• Cryogenic method
• Biogas is directly proportional