International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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Original Research Articles                      Volume : 8, Issue:5, May, 2019

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : /
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2019.8(5): 683-687

Cryogenic Biogas Enrichment Method for Use as a Vehicle Fuel
A.M. Tesfit, T.M. Mahtem and L.B. Joejoe*
Department of Agricultural Engineering, Hamelmalo Agricultural College
*Corresponding author

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 0.5MJ/kg.

Keywords: Biogas, Biogas upgrading, Cryogenic method, Compression, Expansion, Bioreactor

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How to cite this article:

Tesfit, A.M., T.M. Mahtem and Joejoe, L.B. 2019. Cryogenic Biogas Enrichment Method for Use as a Vehicle Fuel.Int.J.Curr.Microbiol.App.Sci. 8(5): 683-687. doi:
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