Assignment:
A straw oil used to absorb benzene from coke-oven gas is to be steamstripped in a sieve-plate column at atmospheric pressure to recover the dissolved benzene, C,H,. Equilibrium conditions at the operating temperature are approximated by Henry’s law such that when the oil phase contains 10 mol% benzene, the equilibrium benzene partial pressure above the oil is 5.07 kPa. The oil may be considered nonvolatile. It enters the stripper containing 8 mol% benzene, 75% of which is to be removed. The steam leaving contains 3 mol% C6H6
(a) How many theorethical stages are required?
(b) How many moles of steam are required per 100 moles of the oil-benzene mixture?
(c) If 85% of the benzene is to be recovered with the same steam and oil rates, how many theoretical stages are required?
Provide complete and step by step solution for the question and show calculations and use formulas.