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http://dx.doi.org/10.5855/ENERGY.2014.23.2.062

Optimization of biomethane production by biogas upgrading process using response surface mothodolgy  

Park, Seong-Bum (Engineering Division, Hansol Seentec Co., Ltd.)
Sung, Hyun-Je (R&D Center, Hansol EME Co., Ltd.)
Shim, Dong-Min (R&D Center, Hansol EME Co., Ltd.)
Kim, Nack-Joo (Department of Fine Chemistry, Seoul National University of Science & Technology)
Publication Information
Journal of Energy Engineering / v.23, no.2, 2014 , pp. 62-73 More about this Journal
Abstract
This research was focused to apply response surface methodology for optimization of bio-methane production by biogas upgrading process. Methane concentration(Y1) and methane efficiency(Y2) on biogas upgrading process were mathematically described as being modeled by the use of the Box-Behnken design on response surface methodology. The results of ANOVA(analysis of variance) about models, the probability value of the methane concentration and methane recovery response surface model are 0.0001 and 0.0001, respectively and coefficient of determination($R^2$) are 0.9788 and 0.9710, respectively. The response surface model is proved of high reliability and suitability. The operation pressure had the greatest influence to methane concentration than other operation parameters and the PSA rotary valve velocity had the greatest influence to methane recovery than other operation parameters. Optimal condition of biogas upgrading process for production of $100Nm^3/hr$ bio-methane were operation pressure 8.0bar and outlet flow rate 31.55RPM, respectively. At that operation condition the methane concentration of bio-methane was 97.13% and methane recovery in biogas upgrading process was 75.89%.
Keywords
Response surface methodology; Box-Behnken design; Biogas upgrading; Biomethane; process optimization;
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