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Ethane is chlorinated in a continuous reactor: C2H6 + Cl2 → C2H5C1 + HCl Some of the product monochloroethane is further chlorinated in an undesired side reaction: C2H$Cl + Cl2 → C2H4C12 + HCl (a) Suppose your principle objective is to maximize the selectivity of monochloroethane production relative to dichloroethane production. Would you design the reactor for a high or low conversion of ethane? Explain your answer. (Hint: If the reactor contents remained in the reactor long enough for most of the ethane in the feed to be consumed, what would the main product constituent probably be?) What additional steps would almost certainly be carried out to make the process economically sound? (b) Take a basis of 100 mol C2H5CI produced. Assume that the feed contains only ethane and chlorine and that all the chlorine is consumed and carry out a degree-of-freedom analysis based on atomic species balances. (c) The reactor is designed to yield 15% conversion of ethane and a selectivity of 14 mol C2H$Cl/mol C2H4C12, with a negligible amount of chlorine in the product gas. Calculate the feed ratio (mol Cl2/mol C2H6) and the fractional yield of monochloroethane.

Ethane is chlorinated in a continuous reactor: C2H6 + Cl2 → C2H5C1 + HCl Some of the product monochloroethane is further chlorinated in an undesired side reaction: C2H$Cl + Cl2 → C2H4C12 + HCl (a) Suppose your principle objective is to maximize the selectivity of monochloroethane production relative to dichloroethane production. Would you design the reactor for a high or low conversion of ethane? Explain your answer. (Hint: If the reactor contents remained in the reactor long enough for most of the ethane in the feed to be consumed, what would the main product constituent probably be?) What additional steps would almost certainly be carried out to make the process economically sound? (b) Take a basis of 100 mol C2H5CI produced. Assume that the feed contains only ethane and chlorine and that all the chlorine is consumed and carry out a degree-of-freedom analysis based on atomic species balances. (c) The reactor is designed to yield 15% conversion of ethane and a selectivity of 14 mol C2H$Cl/mol C2H4C12, with a negligible amount of chlorine in the product gas. Calculate the feed ratio (mol Cl2/mol C2H6) and the fractional yield of monochloroethane.

Introduction to Chemical Engineering Thermodynamics
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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Ethane is chlorinated in a continuous reactor: C2H6 + Cl2 → C2H5C1 + HCl Some of the product monochloroethane is further chlorinated in an undesired side reaction: C2H5C1 + Cl2 → C2H4C12 + HCl (a) Suppose your principle objective is to maximize the selectivity of monochloroethane production relative to dichloroethane production. Would you design the reactor for a high or low conversion of ethane? Explain your answer. (Hint: If the reactor contents remained in the reactor long enough for most of the ethane in the feed to be consumed, what would the main product constituent probably be?) What additional steps would almost certainly be carried out to make the process economically sound? (b) Take a basis of 100 mol C2H;Cl produced. Assume that the feed contains only ethane and chlorine and that all the chlorine is consumed and carry out a degree-of-freedom analysis based on atomic species balances. (c) The reactor is designed to yield 15% conversion of ethane and a selectivity of 14 mol C2H$CI/mol C2H4C12, with a negligible amount of chlorine in the product gas. Calculate the feed ratio (mol Cl2/mol C2H6) and the fractional yield of monochloroethane.
Transcribed Image Text:Ethane is chlorinated in a continuous reactor: C2H6 + Cl2 → C2H5C1 + HCl Some of the product monochloroethane is further chlorinated in an undesired side reaction: C2H5C1 + Cl2 → C2H4C12 + HCl (a) Suppose your principle objective is to maximize the selectivity of monochloroethane production relative to dichloroethane production. Would you design the reactor for a high or low conversion of ethane? Explain your answer. (Hint: If the reactor contents remained in the reactor long enough for most of the ethane in the feed to be consumed, what would the main product constituent probably be?) What additional steps would almost certainly be carried out to make the process economically sound? (b) Take a basis of 100 mol C2H;Cl produced. Assume that the feed contains only ethane and chlorine and that all the chlorine is consumed and carry out a degree-of-freedom analysis based on atomic species balances. (c) The reactor is designed to yield 15% conversion of ethane and a selectivity of 14 mol C2H$CI/mol C2H4C12, with a negligible amount of chlorine in the product gas. Calculate the feed ratio (mol Cl2/mol C2H6) and the fractional yield of monochloroethane.
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