Question

Propane is dehydrogenated to form propylene in a catalytic reactor as: . The process is to be designed for 95% overall conversion of propane. The reaction products are separated into two streams; the first which contains H2, C3H6 and 0.555% of the propane (mole basis) that leaves the reactor, is taken off as product. The second stream, which contains the balance of the unreacted propane and 5% of the propylene in the product stream (on mole basis) is recycled to the reactor. Calculate the compositon of the product, recycle ratio and single pass conversion.
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Answer 1

Propane dehydrogenated to form propylene in the catalytic reactor as:

Propane dehydrogenated to form propylene in the catalytic reactor:

• C3H3 → C3H6 + H2.
• The process will be designed for a complete conversion of propane by 85%.
• Propane Dehydrogenation CH 38CHH 3C2.
• The process will be designed for 95% complete propane conversion.
• The reaction products are divided into the first two streams, consisting of H2, C3H6, and 0.555% propane leaving the reactor, considered as a second stream product, containing the unbalanced propane balance and 5% reactor.
• Propylene in the first stream, is recycled in the reactor.
• Assume that 20% of the excess hydrogen is used in the new feed, and that the reconstituted distribution composition is 22.74 mol% benzene and 77.26 mol% hydrogen.