Question

Problem 4.80 Methanol Synthesis Methanol is synthesized from carbon monoxide and hydrogen in a catalytic reactor. The fresh feed to the process contains 32.0 mol% CO 64.0 mol% H2 and 4.00 mol% N2: This stream is mixed with a recycle stream in a ratio of 10.00 mol recycle / mol fresh feed to produce th feed to the reactor, which contains 12.0 mol% N2 The reactor effluent goes to a condenser from which two streams emerge: a liquid product stream containing essentially all of the methanol formed in the reactor, and a gas stream containing all o the CO, H2, and N2 leaving the reactor The gas stream is split into two fractions; one is removed from the process as a purge stream, and the other is the recycle stream that combines with the fresh feed to the reactor. For a methanol production rate of 100.0 mol/h, calculate the fresh feed rate (mol/h), the molar flow rate and composition of the purge gas, and the overall and single-pass conversions. Fresh feed rate Purge rate: mol fraction CO in purge: mol fraction N2 in purge: Overall CO conversion: Single-pass CO conversion: mol/h

Answer 1

fF but (lo0 6.3Y Rtayt Reauce Sol mole fonduct-Ne w Purge ニo.ia &

39.63 ad/ rples+ co: mみγ mdstjd Hj" Q6.40d/h. '3.al (45.45 (03v) 4.45 Co.21) 1454s ( 3 v) owral Co Convesiu mdes t.us (o sy) + loxl45 45o.) 46-544 + 4위, g 43501 Av 468.3s