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Q.3. Formaldehyde is produced by dehydrogenation of methanol. CH,OH HCHO + H2 The single pass conversion is 67%. The product leaving the reactor is fed to a separation unit where formadehyde is separated from methanol and hydrogen. The separated methanol is recycled to the reactor. If the production rate of formadehyde is 1000 kg/h, calculate: (a) Calculate combined feed ration (b) the flow rate of methanol required to process (as fresh feed). Q.4. Propane is dehydrogenated to form propylene in a catalytic reactor. CHE C3H + H2 The process is to be designed for 95% overall conversion of propane. The reaction products are separated into two streams: the first, which contains H, CH, 0.555% propane (mole basis) that leaves the reactor is taken off as product; the second product which contains the balance of unreacted propane and 5% propylene in the product stream (on mole basis) is recycled to the reactor. Calculate the composition of the product, recycle ratio, and single pass conversion