According to the actual content of CO2 in raw biogas, the volume fraction of CO2 in the simulated gas was in the range of 25%–45%.
The pressure in the absorption tower was in the range of 0.8–1.2 MPa and the gas flow rate into the tower was 400–700 L·h-1.
The flow rates of tap water and cooling water in the heat exchange were controlled at100–200 and 150 L·h-1, respectively. The gas flow of the air blowerwas kept at 15 m3·h-1