Application of Pressure Swing Adsorption for Carbon Dioxide and Methane Enrichment in Biogas Mixture Produced from Animal Manure and Organic Waste

Purifed biogas is the way to enhance biogas utilization for many applications. Pressure Swing Absorption (PSA) is a promising technique for separating methane from carbon dioxide. The goal of this study is to evaluate the effectiveness of methane and carbon dioxide separation from biogas stream by utilizing MSC-3K 172 as an adsorbent. Biogas is produced from the anaerobic fermentation of animal manure and organic waste. A 150-liter gas storage tank is connected to a 200-liter gas fermenter tank in a biogas digester. The system has a batch capacity of 0.112 m3 of biogas. To separate methane and carbon dioxide, the PSA technique was used. As solid absorbents, Molecular Sieve (SHIRASAGI MSC 3K-172) were employed. The effects of pressure, flow rate, and time of experiment were investigated. The outcome showed that CO2 captured behaviour is influenced by pressure and flowrate. The fraction of CO2 captured increases with pressure. The behaviour of CO2 captured is inversely correlated with the gas flow rate. The amount of CO2 captured increases as the flow rate decreases. The findings indicate that 99.23% of CO2 may be captured utilizing the PSA technique using molecular sieve (SHIRASAGI MSC 3K-172) as solid absorbent. The methane content in biogas was found to be between 65 and 68 percent; however, after going through the PSA process, the concentration of CH4 rose to 98.26%. As a result, if the separated methane gas is stored properly, it can be used for a variety of purposes, such as household cooking gas and vehicle fuel.