膜吸收法回收烟气CO_2传质过程研究

Study on the mass transfer process of flue gas carbon capture with membrane contactor

在0.1~2 m^3/h模拟烟气膜吸收处理装置上,进行了膜吸收法捕集CO_2传质过程研究。在其他条件不变的情况下,考察了气体流量、吸收液流量和吸收液浓度对传质过程的影响;结合吸收溶剂的化学反应增强因子及中空膜本身的参数,建立了膜吸收过程的传质计算模型。试验结果表明:在有化学吸收推动的膜吸收传质过程中,膜吸收的传质阻力集中在气相和膜的界面,而反应发生在液膜界面,所建立的计算模型也很好地反映了这一现象。通过建立传质模型,可以推算出膜表面吸收传质过程,从而为膜吸收过程的工业放大提供支撑。

The mass transfer process is studied on a 0. 1-2 m^3/ h simulation flue gas carbon capture pilot plant. The affection of flow rate of flue gas,the flow rate and concentration of solvent are investigated with the other conditions constantly. A mass transfer process model of membrane contactor is established with the chemical reaction enhancement factor of solvent and the parameters of membrane contactor. Through the experiment it is found that the mass transfer resistance of membrane contactor focus on the gas and membrane contact surface,while the reaction is held in the liquid and membrane contact surface,which is proved by the model calculated. The mass transfer process can be predicted with the mass transfer model,which can provide support for the design of industry scale of carbon capture plant with membrane contactor.