The pellets adsorb 97.0% of the water and none of the other constituents of the air. The column
packing was initially dry and had a mass of 3.40 kg. Following 5.0 hours of operation, the pellets are
reweighed and found to have a mass of 3.54 kg.
(a) Calculate the molar flow rate (mol/h) of the feed gas and the mole fraction of water vapor in the
product gas. .
(b) The mole fraction of water in the product gas is monitored and found to have the value calculated
in part (a) for the first 10 hours of operation, but then it begins to increase. What is the
most likely cause of the increase? If the process continues to run, what will the mole fraction of
water in the product gas eventually be?
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