Subquality natural gas contains an intolerable amount of nitrogen impurity. Separation processes that can be used to

Question:

Subquality natural gas contains an intolerable amount of nitrogen impurity. Separation processes that can be used to remove nitrogen include cryogenic distillation, membrane separation, and pressure-swing adsorption. For the latter process, a set of typical feed and product conditions is given below. Assume a90% removal of N2 and a 97% methane natural-gas product. Using the R-K equation of state with the constants listed below, compute the flow rate in thousands of actual cubic feet per hour for each of the threestreams.