1Department of Energy Technology, School of Engineering and Technology, Kenyatta University, Kenya, Kenya
2Department of Civil Engineering, School of Engineering and Technology, Kenyatta University, Kenya
3School of Pure and Applied Sciences, Pwani University, Kenya, Kenya
BibTex Citation Data :
@article{IJRED48269, author = {Gad Mugagga and Isaiah Omosa and Thomas Thoruwa}, title = {Optimization and Analysis of a Low-Pressure Water Scrubbing Biogas Upgrading System via the Taguchi and Response Surface Methodology Approaches}, journal = {International Journal of Renewable Energy Development}, volume = {12}, number = {1}, year = {2023}, keywords = {Biogas upgrading; Biogas yield; Packings; Taguchi method; Response surface methodology.}, abstract = {Biogas upgrading is essential in order to increase the calorific value and improve the quality of raw biogas. This present study aims at investigating the optimum performance of a near atmospheric pressure water scrubbing (NAPWS) system for biogas upgrading while using both the adsorption and absorption techniques. This was achieved through a two-stage process: namely, the Taguchi approach followed by the response surface methodology (RSM). The Taguchi orthogonal array design consisted of 27 runs where the raw biogas pressure (10 - 30 kPa), liquid flow rates (2.6 - 4.2 l/ min.) and variations of the steel wool height (0 - 45.72 cm) in the adsorption column were experimentally studied with respect to the methane (CH 4 ) yield and removal efficiency of hydrogen sulfide (H 2 S) and carbon dioxide (CO 2 ). From the experiments, the removal efficiency of hydrogen sulfide was greater than 87% with the average bio-methane content of 77.67%. During the second-stage, the analysis of variance (ANOVA) and the RSM were undertaken for optimization of the process parameters. The optimum bio-methane concentration of 84.71 (%v/v) CH 4 and 13.31 (%v/v) CO 2 was attained at gas pressure of 14kPa, liquid flow rate of 4.2 l/min., and steel wool height at 22.86cm obtained through numerical optimization. These results revealed that the utilization of the Taguchi and the RSM yielded to the best optimal system performance with the liquid flow rate as the most significant factor}, pages = {99--110} doi = {10.14710/ijred.2023.48269}, url = {https://ejournal.undip.ac.id/index.php/ijred/article/view/48269} }
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An innovative approach to a pressurized water scrubbing system with several packing materials for upgrading biogas to biomethane
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