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Question Number II (17 Marks) Ethanol (EtOH) can be produced by the hydration of ethylene, C2H4...

Question Number II Ethanol (EtOH) can be produced by the hydration of ethylene, C2H4 + H2O ⇔ C2H5OH, at 300°C and high pressure with a phosphoric acid catalyst. Downstream of the reactor, a condenser is used to separate the product, which contains only EtOH and H2O, from a recycle stream that mixes with the fresh feed before entering the reactor. The fresh feed contains 30 mol% C2H4 and the remainder is steam. The single pass conversion is 20%.

a. Draw and label the process flowchart. (4)

b. Determine how many moles of product are produced per mole of fresh feed. (5)

c. Determine how many moles of ethylene are recycled per mole of fresh feed. (4)

d. What is the overall conversion of ethylene? (2)

e. If inert species are present in the feed, what other type of stream will be required in the process?

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