A compact, economic scrubber to improve farm biogas upgrading systems

摘要: Abstract This paper presents a theoretical and experimental study of new biogas upgrading technology its application at farm scale. The process is designed for flows raw up to 50 Nm3/h (55% CH4 45% CO2). system includes physical absorption CO2 7–10 bars into water desorption atmospheric pressure. First, the traditional bottom column design improved avoid usual formation bubbles leaks. As second technological breakthrough, successfully recycled using static mixer enhance from water. Finally, scrubbing entirely characterized: carbon dioxide modeled transfer unit height (HTUOG) number gas units (NTUOG); step performed in pressure modeled. Experiments with this scrubber were conducted on inlet flow rates ranging between 15.6 42 Nm3/h. It proved possible upgrade by 77% (QG = 40.7 Nm3/h, QL = 8.243 m3/h, P = 7.924 bar T = 285 K) good efficiency (57.5%), high methane recovery ratio (94%) low power consumption (0.26 kWh/Nm3). comparative analysis results modeling proposed provides references evaluate simple, cheap, compact potential production bio-methane (no solvent recirculation) or fuel (solvent recirculation).