A producer gas contains 8.5%carbon dioxide, 0.8%ethylene, 21.2%carbon monoxide, 17.1%hydrogengas, 1.7%methane, 50.7%nitrogen gas. The Orsat analysis of the stack gas is found to contain 12.5%carbon dioxide, 0.7%carbon monoxide, 8.6%oxygen gas and78.2%nitrogen gas. Determine the L of air used per liter of producer gas at the same conditions. 2.29%

1.88%

2.06%

1.72%

none of these

Liquid acetone is fed at a rate of 500 L/min into a heated chamber, where it evaporates into a nitrogen stream. The gas leaving the heater is diluted by another nitrogen stream flowing at a measured rate of 420 m3(STP)/min. The combined gases are then compressed to a total pressure of 6 atm gauge at a temperature of 325 C. The partial pressure of acetone in this stream is 501 mm Hg. Atmospheric pressure is 765 mm Hg. The density of liquid acetone is791 g/L. What is the volumetric flow rate of the nitrogen entering the evaporator if the temperature and pressure of this stream are 27 0Cand 475 mm Hg gauge?

420 m3/min

470 m3/min

510 m3/min

550 m3/min

none of these