Energy and economic analysis of a water scrubbing based biogas upgrading process for biomethane injection into the gas grid or use as transportation fuel

摘要: Abstract This works describes the biogas upgrading process to substituted natural gas (SNG), specifically called biomethane, for grid and vehicle application. The physical processes of carbon dioxide absorption desorption respectively in a pressurized water scrubber stripper are described by means Henry’s law. Both CO 2 columns designed Transfer Units Method order handle stream that is available from an anaerobic digestion manure. In particular, case study small scale plant located centre Italy analysed with aim assess energy conversion efficiency economics injection It found whole 89.8% 87.3% Concerning economic analysis plant, capital operating costs determined Italian legislative framework included account subsidies. Results show unit production cost biomethane 0.54 €/Sm 3 while it 0.73 €/Sm