ISSN 2630-0583 (Print)

ISSN 2630-0656 (Online)

JCST

Journal of Current Science and Technology

http://jcst.rsu.ac.th

Journal of Current Science and Technology. Vol.8 No.2 , July - December 2018.

Application of microbubble technique for CO2 and CH4 entrapment in biogas

Songphon Suekkhachat, Somchai Saeung, and Chayut Nuntadusit

Abstract

          Biogas has been found as the alternative renewable resource to replace fossil fuels, which contains 53-70% of CH4, 30-50% of CO2 and other gases.  Water scrubber is the most popular technique for biogas cleaning due to economic and also high purification output.  This research aimed to investigate biogas upgrading by using microbubble that generated from a developed swirl nozzle.  The water flow rates were controlled of 10, 15, 20, 25, 30 and 35 litre/min.  The bubble varied in the range of 50.44-116.04 µm for entire experiment. CO2 removal from pilot scale by entrapping CO2 reached 83.06%, and CH4 was recovered to 96.26% at conditions of 35 litre/min of water, 0.1 litre/min of constant gas flow rate.  Finally, flow characteristics form simulation result inside reactor including with nozzle part were discussed to understand flow phenomena.

Keywords: biogas, CH4, CO2r, microbubble, microbubble generator, microbubble technique, water scrubber

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DOI: 10.14456/jcst.2018.8