Question

Question 3 15 pts In order for a PEM fuel cell to operate efficiently, the hydrogen must be saturated with water. Consider a stream of 150 kmol/h of dry H2 which bubbles through a packed column of water. If the system is maintained at 67°C and 140 kPa (abs), determine the mole fraction of water in the saturated vapor (in kmol H2O/kmol gas). You may assume that no hydrogen will dissolve into the water.

Answer 1

Sol" Isom Stasi sat sat 67 at T table p= 27.67 kPa pressure is game p = 140 kha total Pizzo + Pur 2 140 Pin 2140 - 27.67 Putz 112.33 kPa the sance pan nuo mole => 2 2= Pino Pinot Pur free" hot han x = 27.67 27.12 + 112-33 no 0.197 Aug