Biogas specific heat capacity variations during upgrading

The research paper presents theoretic analysis and simulation results of biogas specific heat capacity and density dependence on biogas content and temperature. The research results indicate that methane content has inverse impact on density - the density decreases by 16⋯19 % when the methane concentration increases from 50 % to 75 %. Specific heat capacity of biogas increases, when the methane concentration increases - by 17 % when the methane concentration increases from 50 % to 75 %. When biogas is being upgraded using a passive drier - a heat exchanger, and water vapor is removed, both the density and specific heat capacity decrease. The knowledge gathered is important for designers calculating biogas heat exchangers and passive driers.