关键词: 膜气体吸收, 复合溶液, 交互作用, 湿润性, 模拟

Abstract: A model of differential equations for membrane-based absorption of CO₂ into complex solutions was presented and, interaction between methyldiethanolamine (MDEA) and 2-amino-2-methyl-1-propanol (AMP) in reactions with CO2 and wetting of the solutions on membrane pores were taken into account in the model.The effects of various factors such as interaction, wetting, modules, liquid and gas velocities, on mass transfer were simulated.Additionally,the effect of the solutions on membrane configuration was analyzed by SEM images.Interaction and wetting were significant non-negligible factors in mass transfer.Overall enhancement factor of complex solution was not summation of that of MDEA and AMP.Membrane resistance rapidly increased and became dominant with partial membrane pores being wetted.Membrane pores were easily wetted at high liquid velocity.SEM images displayed that aqueous solutions of both MDEA and MDEA+AMP made pores bigger and hydrophilic.By taking account of interaction and wetting into model, simulation value was in better agreement with experimental one.

Key words: 膜气体吸收, 复合溶液, 交互作用, 湿润性, 模拟