Experiments were performed to separate CO2 from biogas using a ceramic hollow fiber membrane contactor (HFMC). CH4/CO2 mixed gas (34.5% CO2, CH4 balance) and monoethanolamine (MEA) were used. The influence of operating conditions, such as the gas flow rate, liquid flow rate, L/G ratio, CO2 partial pressure, and module type, on the CO2 removal efficiency and CO2 absorption flux was evaluated. As the gas flow rate increased, the CO2 removal efficiency decreased, while the CO2 absorption flux increased. The maximum CO2 removal efficiency was 96% at a gas flow rate of 0.1Nm3 h−1 while the maximum CO2 absorption flux was 7.5×10−3 mol·m−2·s−1 at a gas flow rate of 1Nm3 h−1. Moreover, the CO2 absorption flux and CO2 removal efficiency could be increased by more than 20% using the high-flux module.

中文翻译：

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使用多孔疏水陶瓷中空纤维膜接触器从沼气流中分离 CH4/CO2

使用陶瓷中空纤维膜接触器 (HFMC) 进行实验以从沼气中分离 CO2。使用 CH4/CO2 混合气体（34.5% CO2，CH4 余量）和单乙醇胺 (MEA)。评估了操作条件，如气体流量、液体流量、L/G 比、CO2 分压和模块类型对 CO2 去除效率和 CO2 吸收通量的影响。随着气体流量的增加，CO2去除效率降低，而CO2吸收通量增加。在0.1Nm3 h-1的气体流量下，CO2的最大去除效率为96%，而在1Nm3 h-1的气体流量下，最大的CO2吸收通量为7.5×10-3 mol·m-2·s-1 . 此外，使用高通量模块可以将 CO2 吸收通量和 CO2 去除效率提高 20% 以上。