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Unformatted text preview: o F. (a) Based on the following data, determine the diameter and height of the carbon bed, assuming adsorption at 100 o F and 1 atm and a time-to-breakthrough of 8 hr with a superficial gas velocity of 60 ft/min. (b) Is the bed height-to-diameter ratio approximately 1.0? If not, would you increase or decrease the breakthrough time make the bed height-to-diameter approximately 1.0? Adsorption isotherm data (100 o F) for EA: p EA , atm q, lb EA / lb C p EA , atm q, lb EA / lb C 0.0002 0.125 0.0020 0.227 0.0005 0.164 0.0050 0.270 0.0010 0.195 0.0100 0.304 Breakthrough data at 100 o F and 1 atm for EA in air at a gas superficial velocity of 60 ft/min in a 2-ft dry bed: Mol Fraction EA in Effluent Time, min Mol Fraction EA in Effluent Time, min 0.00005 60 0.00100 95 0.00010 66 0.00250 120 0.00025 75 0.00475 160 0.00050 84 [Hint: Molecular weight of ethyl acetate is 88.1. Also, you may assume plug flow to estimate a bed diameter based on the superficial gas velocity.]...
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- Winter '08