Removal of contaminants from biogas: a study on H2S, CO2, and water vapor reduction

Abstract

This study investigates the effectiveness of a biogas treatment process utilizing anhydrous sodium sulfate, iron fillings, and ash as treatment materials to enhance the quality of raw biogas. The treated biogas exhibits a significant increase in methane content (94.75%) compared to the raw biogas (67.10%), rendering it a more valuable fuel. Notably, the treatment process reduces carbon dioxide content (4.90% vs. 32.15%), hydrogen sulfide content (0.20% vs. 0.50%), and eliminates water vapor, thereby minimizing environmental impact, pipeline corrosion, and equipment damage. The upgraded biogas demonstrates improved safety and handling characteristics, making it suitable for various applications, including power generation, industrial processes, and transportation fuel. A comparative analysis with existing literature highlights the efficacy of the treatment process in producing high-quality biogas, aligning with industry standards and requirements. The use of anhydrous sodium sulfate, iron fillings, and ash as treatment materials proves to be a effective and efficient method for biogas upgrading.