Question

Three thousand cubic meters per day of a gas mixture containing methane and n-butane at 21°C enters an absorption tower. The partial pressures at these conditions are 103 kPa for methane and 586 kPa for n-butane. In the absorber, 80% of the butane is removed and the remaining gas leaves the tower at 38°C and a total pressure ot 550 kPa. What is the volumetric flow rate of gas at the exit? How many moles per day of butane are removed from the gas in this process? Assume ideal behaviour.

Answer 1