A simplified flowsheet is shown in the figure for the production of ethanol from ethylene. The conversion of ethylene in the reactor is 30% and the scrubber following the reactor completely separates ethylene (as top product) and ethanol and water as bottoms. The last (distillation) column gives an ethanol-water azeotrope (90 mol % ethanol) as the final product and water as waste. The recycle to purge ratio is 34. Recycle 34 HO 콴 a) The reaction is: C₂H+H₂O C₂H5OH). For an azeotrope product rate of 500 mol/h, the recycle gas flow rate in mol/h is? Reactor Purge -Wash water Scrubber washwar b) For the same process, if fresh H₂O feed to the reactor is 600 mol/h and wash water for scrubbing is 20% of the condensable coming out of the reactor, the water flow rate in mol/h from the distillation column as bottoms is?

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
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A simplified flowsheet is shown in the figure for the production of ethanol from ethylene. The
conversion of ethylene in the reactor is 30% and the scrubber following the reactor completely
separates ethylene (as top product) and ethanol and water as bottoms. The last (distillation)
column gives an ethanol-water azeotrope (90 mol % ethanol) as the final product and water as
waste. The recycle to purge ratio is 34.
Recycle
34
HO
콴
a) The reaction is: C₂H+H₂O C₂H5OH). For an azeotrope product rate of 500 mol/h,
the recycle gas flow rate in mol/h is?
Reactor
Purge
-Wash water
Scrubber
washwar
b) For the same process, if fresh H₂O feed to the reactor is 600 mol/h and wash water for
scrubbing is 20% of the condensable coming out of the reactor, the water flow rate in mol/h
from the distillation column as bottoms is?
Transcribed Image Text:A simplified flowsheet is shown in the figure for the production of ethanol from ethylene. The conversion of ethylene in the reactor is 30% and the scrubber following the reactor completely separates ethylene (as top product) and ethanol and water as bottoms. The last (distillation) column gives an ethanol-water azeotrope (90 mol % ethanol) as the final product and water as waste. The recycle to purge ratio is 34. Recycle 34 HO 콴 a) The reaction is: C₂H+H₂O C₂H5OH). For an azeotrope product rate of 500 mol/h, the recycle gas flow rate in mol/h is? Reactor Purge -Wash water Scrubber washwar b) For the same process, if fresh H₂O feed to the reactor is 600 mol/h and wash water for scrubbing is 20% of the condensable coming out of the reactor, the water flow rate in mol/h from the distillation column as bottoms is?
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