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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2017: 100.00
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2017: 100.00
For more details click here

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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2019.8(5): 683-687
DOI: https://doi.org/10.20546/ijcmas.2019.805.080


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
Abstract:

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: https://doi.org/10.20546/ijcmas.2019.805.080