Suppose a gas absorption tower needs to remove 99% of N2O4 in air. The packing will be 16-mm Pall rings. The gas enters at a rate of 1 lbm/s and contains 1.0 weight% N2O4 and 99% air at 300 K. The absorbant consists of water entering at 0.2 lbm/s. The N2O4 reacts readily with water. Assume Kya = 100 lbm N2O4/h-ft3-ΔY and the capacity of the column at the flood point is 1,000 lbm gas/h-ft2. The units of y are lbm N2O4/lbm air. Suppose 75% of the flood point is use as operating gas mass velocity, the total weight of the Pall rings is ____ lbs.

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Q: Handwritten answer

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