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Upgrading techniques for transformation of biogas to bio‐CNG: a review
Author(s) -
Singhal Shailey,
Agarwal Shilpi,
Arora Shefali,
Sharma Pankaj,
Singhal Naveen
Publication year - 2017
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.3719
Subject(s) - pressure swing adsorption , biogas , waste management , compressed natural gas , data scrubbing , natural gas , methane , fossil fuel , process engineering , environmental science , energy carrier , engineering , renewable energy , adsorption , chemistry , mechanical engineering , organic chemistry , electrical engineering
Summary Increasing consumption of fossil fuels and environmental concern has led to increased use of compressed natural gas (CNG) in the transportation sector. Keeping in view limited resources of CNG, biogas is advised as potential fuel to provide continuous supply of CNG in the form of bio‐CNG. Various technologies, that is, physical and chemical absorption (using water and amine solutions, respectively, for the absorption of carbon dioxide), pressure swing adsorption, membrane separation, and cryogenic separation, are available for purifying biogas and thus upgrading it, to bio‐CNG with about 95% methane. Among these, water scrubbing and pressure swing adsorption are the best technologies with respect to various aspects including cost; however, suitability of a technology is decided by various factors including size/quantity of biogas generation, targeted quality of biogas, site of application, and economics of process. Copyright © 2017 John Wiley & Sons, Ltd.