Can mixed gas containing SO2 be separated by membrane?

Someone has done such research. Membrane separation technology represented by organic polymer membrane is a new gas separation technology developed in recent years and has been widely used, especially in water purification and treatment. Researchers such as Jin Mei from the Dalian Institute of Physics and Chemistry of the Chinese Academy of Sciences creatively used membranes to absorb liberated SO2 gas. The effect was quite significant, with a desulfurization rate of 90%. The process is: They used a polypropylene hollow fiber membrane absorber and NaOH solution as the absorption liquid to remove SO2 gas. The characteristic is that the porous membrane is used to separate the gaseous SO2 gas and the NaOH absorption liquid. The SO2 gas passes through the pores in the porous membrane and reaches the gas-liquid phase interface. SO2 reacts rapidly with NaOH to achieve the purpose of desulfurization. This method is a new technology that combines membrane separation technology and absorption technology. It has low energy consumption, simple operation and low investment. I haven't seen any engineering examples.

In my opinion, membrane absorption and membrane separation are different concepts. The role of absorbent in the membrane absorption process is very critical, while membrane separation alone is the most important tool. I wonder if there are any examples of membrane separation?

SO2 is very corrosive. It is impossible for ordinary membranes to be used in a SO2 environment for a long time. It is difficult to achieve separation with organic membranes.