Question 2 (20 Marks) You are asked to determine the required height of an adsorption column designed to treat 10,000 scfm of air contaminated with 2000 ppm of trichloroethylene (TCE, molecular weight = 131.5, Freundlich isotherm constant = 0.255, Freundlich isotherm exponent = 0.161, with the TCE concentration expressed in Pascals). The adsorption cycle is set at 4 h in adsorption mode, 2 h in heating and desorbing mode, and I h in standby. The adsorber recovers 99.55 of the weight of TCE. A rectangular adsorber with a width of 5 ft and a length of 15 ft is used. Standard conditions for flow measurement are 60F and I atm; operating temperature and pressure are 60F and 28 psia. Assume that the mass transfer zone is 5% of the overall adsorber height and that it is half saturated. The adsorbent density is 36 1b/ft