Hi, I am to do design calculation for membrane separation. The membrane is to be used to separate a Co2 from a mixture of n_butane and co2. The raw gas feed mixture flows at 389127kh/h and contains 18% co2. Given pressure range is 700kpa and gas temperature is 10 degree. The required purity of co2 and n-butane are 99.9%.

How to go about this?