Design and development of a packedbed scrubber for upgradation of biogas using a closed-loop process: An economical and environmental approach

Abstract

Biogas can be produced from any biomass source and is renewable fuel. The main drawbacks in the composition of biogas are the presence of carbon dioxide (CO2) and hydrogen sulphide (H2S) which affect the storage devices. The removal of CO2 and H2S is of great interest today. Different methods for removal of both the elements were suggested by many researchers. The present work aims to remove the CO2 and H2S using combined effects of water scrubbing and algae. For this purpose a packed bed scrubber was designed using Solid Works and fabricated in our department. The present experimental investigation shows that upto 73% methane in biogas is obtainable with the mixing ratio of SCK: CD (25: 75), in which carbon dioxide is about 17% and hydrogen sulphide is 0.23%. By using a packed bed scrubber, the biogas was purified and after purification the methane percentage increased by approximately 27% and the CO2 decreased by 77%. And H2S decreased by about 94%