The simulated biogas was pumped into the gas buffer tank and induced to the absorption tower. The inflow gas was controlled at different flow rates with a gas flow gauge. The tap water in the lean solution tank was pumped to and sprayed from the top of absorption tower.
The CO2-rich water flowed into the rich solution tank from the absorption tower and was further pumped into the desorption tower through a cooling process by a heat exchanger. The regenerated water was recycled from the desorption tower and flowed into the lean solution tank. The purified simulated biogaswas discharged fromthe top of the absorption tower.