Question: Ethanol is produced commercially by the hydration o ethylene: C 2 H + H 2 0 C 2 H 5 OH some of the

Ethanol is produced commercially by the hydration o ethylene: C₂H + H₂0 → C₂H₅OH some of the product is converted to diethyl ether in the side reaction 2C₂H₅OH → (C₂H₅)₂O + H₂O the feed to the reactor contains ethylene steam and an inert gas. A sample of the reactor effluent gas is analyzed and found to contain 43.3mole% ethylene, 2.5% ethanol, 0.14% ether, 9.3% inserts and the balance water.

(a) Take as a basis 100 mol of effluent gas, draw and label a flowchart, and do a degree-of-freedom analysis based on atomic species to prove that the system has zero degrees of freedom.⁷

(b) Calculate the molar composition of the reactor feed, the percentage conversion of ethylene the fractional yield of ethanol, and the selectivity of ethanol production relative to ether production.

(c) The percentage conversion of ethylene you calculated should be very low. Why do you think the reactor would be designed to consume so little of the reactant?

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