Only solve question b, the answer should be 4084 kW

6. Ethylbenzene (C8H10) is commercially produced through the direct addition reaction between ethylene (C2H4) and benzene (C6H6) : IC6H6+C2H4C8H10 A side reaction between ethylene and benzene also produces di-ethylbenzene (C10H14) : C6H6+2C2H4C10H14 Ethylene gas at 5 bar and 25C is mixed with a fresh feed of liquid benzene at 5 bar and 25C and a recycle stream containing benzene vapour and gas-phase ethylene at 5 bar and 150C. The combined feed stream enters the reactor at 5 bar and 400C and contains 80 mole\% benzene and 20 mole\% ethylene. The conversion of the limiting reactant (based on the first reaction above) in the reactor is 90%. The selectivity of C8H10 to C10H14 is 5 . After leaving the reactor, the reactor effluent stream enters a separation system which generates the benzene/ethylene recycle stream and a product stream containing all the produced C8H10 and C10H14. Using a basis of 100mol/s of feed entering the reactor, determine the a) molar flow rate of C8H10 and C10H14. Answer: 12.86mol/s;2.57mol/s b) rate of heating before the reactor (in kW ). Answer: 4084kW The flow diagram is given below