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Question: ethylene oxide is produced by the catalytic oxidation of ethylene...

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Ethylene oxide is produced by the catalytic oxidation of ethylene: 2C2H4 + O2 → 2C2H4O An undesired competing reaction is the combustion of ethylene: C2H4 + 3O2 → 2CO2 + 2H2O The feed to the reactor (not the fresh feed to the process) consists of 3.00 moles of ethylene per mole of oxygen. The single-pass conversion of ethylene to either ethylene oxide or carbon dioxide is 20.0%, and for every 100.0 moles of ethylene consumed in the reactor, 95.0 moles of ethylene oxide emerges in the reactor products. A multiple-unit process is used to separate the products: ethylene and oxygen are recycled to the reactor, ethylene oxide is sold as a product, and carbon dioxide and water are discarded. Assume a quantity (100.0 mol/h) of the reactor feed stream as a basis of calculation, draw and label the flowchart, perform a degree-of-freedom analysis, and write the equations you would use to calculate (i) the molar flow rates of ethylene and oxygen in the fresh feed, (ii) the production rate of ethylene oxide, and (iii) the overall conversion of ethylene.

Molar flow rate of oxygen in the fresh feed: ? (mol/h)

Calculate the molar flow rates of ethylene and oxygen in the fresh feed needed to produce 1 ton per hour of ethylene oxide.

Molar flow rate of ethylene: ? (lb-mol/h)
Molar flow rate of oxygen: ? (lb-mol/h)

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