Question: a membranebased process is used to separate hydrogen from a...
A membrane-based process is used to separate hydrogen from a gas mixture containing 90 mol% hydrogen (H2), 9 mol% methane (CH4) and 1 mol% nitrogen (N2). The gas that passes through the membrane, called the permeate, is enriched in hydrogen, while the gas that does not pass through the membrane, called the retentate, is depleted in hydrogen. The total feed flow rate is 50 kmol/h and the membrane is completely impermeable to nitrogen.
a. If the permeate is 98.9 mol% pure in hydrogen and the split fraction (SF) for hydrogen to the permeate is 0.7231, calculate the flow rates of both the permeate and retentate.
b. Calculate the composition of the retentate.
c. Calculate the separation power (SP) of this system for hydrogen relative to methane.