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JCST

Journal of Current Science and Technology

ISSN 2630-0656 (Online)

Application of microbubble technique for CO2 and CH4 entrapment in biogas

  • Songphon Suekkhachat, Faculty of Engineering, Prince of Songkla University, Hatyai, Songkhla, Thailand
  • Somchai Saeung, Faculty of Engineering, Prince of Songkla University, Hatyai, Songkhla, Thailand
  • Chayut Nuntadusit, Faculty of Engineering, Prince of Songkla University, Hatyai, Songkhla, Thailand, Corresponding author; E-mail: chayut.n@psu.ac.th

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

PDF (484.95 KB)

DOI: 10.14456/jcst.2018.8

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