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in a reactor, benzene is converted to monochlorobenzene (MCB, CeH.CI) according to the following reaction CoHs+ClCH;CI + HCL 1. In a consecutive reaction, MCB can react with another Cla molecule to form dichlorobenzene (DCB, CeH.Cla), according to: CaHsCl+ Cl C.H,Clz +HCI Refer to the diagram below for a simplistic representation of the process. The feed to this reactor (stream 2) contains a benzene/chlorine mixture with a molar ratio of chlorine to benzene of 1:1.2. This stream also contains a 1.0 mol.% contamination of N2. The fractional conversion of benzene in the reactor is 60% and the selectivity of MCB to DCB is 8. The effluent of the reactor is directed to a separation unit (S1), where the liquid products (Benzene, MCB, DCB and HCI) are separated from the gaseous products (Clz and Na). The gaseous stream (stream 5) is partially purged (stream 7) and recycled (stream 6). The purge factor is 4%, which means that 4% of stream 5 is purged. The liquid stream (stream 4) is sent to another separation unit (S2), where the chloro-containing products (MCB, DCB and HCI) are separated from benzene. Benzene is recycled via stream 8. The two recycle streams (6 and 8) are mixed with the fresh feed (stream 1). Stream 9 is further processed to get the products in its pure form, (6) (7) HCl (5) (9) l00 (2) (3) (4) (1) Reactor S1 S2 Litte (8) a.) What is the limiting reagent and what is the percentage of excess of the excess reagent? b.) Calculate the molar flow rate and composition of the purge stream (stream 7). c.) Calculate the molar flow rate and composition of the fresh feed stream (stream 1)

in a reactor, benzene is converted to monochlorobenzene (MCB, CeH.CI) according to the following reaction CoHs+ClCH;CI + HCL 1. In a consecutive reaction, MCB can react with another Cla molecule to form dichlorobenzene (DCB, CeH.Cla), according to: CaHsCl+ Cl C.H,Clz +HCI Refer to the diagram below for a simplistic representation of the process. The feed to this reactor (stream 2) contains a benzene/chlorine mixture with a molar ratio of chlorine to benzene of 1:1.2. This stream also contains a 1.0 mol.% contamination of N2. The fractional conversion of benzene in the reactor is 60% and the selectivity of MCB to DCB is 8. The effluent of the reactor is directed to a separation unit (S1), where the liquid products (Benzene, MCB, DCB and HCI) are separated from the gaseous products (Clz and Na). The gaseous stream (stream 5) is partially purged (stream 7) and recycled (stream 6). The purge factor is 4%, which means that 4% of stream 5 is purged. The liquid stream (stream 4) is sent to another separation unit (S2), where the chloro-containing products (MCB, DCB and HCI) are separated from benzene. Benzene is recycled via stream 8. The two recycle streams (6 and 8) are mixed with the fresh feed (stream 1). Stream 9 is further processed to get the products in its pure form, (6) (7) HCl (5) (9) l00 (2) (3) (4) (1) Reactor S1 S2 Litte (8) a.) What is the limiting reagent and what is the percentage of excess of the excess reagent? b.) Calculate the molar flow rate and composition of the purge stream (stream 7). c.) Calculate the molar flow rate and composition of the fresh feed stream (stream 1)

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
Problem 1.1P
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in a reactor, benzene is converted to monochlorobenzene (MCB, CeHsCI) according to the following reaction CH6+Cl2CgH;Cl+ HCL In a consecutive reaction, MCB can react with another Clz molecule to form dichlorobenzene (DCB, CeH.Cl2), according to: CHSCI+ Cl C,H,Clz + HCL Refer to the diagram below for a simplistic representation of the process. The feed to this reactor (stream 2) contains a benzene/chlorine mixture with a molar ratio of chlorine to benzene of 1:1.2. This stream also contains a 1.0 mol.% contamination of N. The fractional conversion of benzene in the reactor is 60% and the selectivity of MCB to DCB is 8. The effluent of the reactor is directed to a separation unit (S1), where the liquid products (Benzene, MCB, DCB and HCI) are separated from the gaseous products (Cla and Na). The gaseous stream (stream 5) is partially purged (stream 7) and recycled (stream 6). The purge factor is 4%,. which means that 4% of stream 5 is purged. The liquid stream (stream 4) is sent to another separation unit (S2), where the chloro-containing products (MCB, DCB and HCI) are separated from benzene. Benzene is recycled via stream 8. The two recycle streams (6 and 8) are mixed with the fresh feed (stream 1). Stream 9 is further processed to get the products in its pure form. (6) (7) 004 (5) (9) 100 fisid (4) (1) (2) (3) Reactor S1 S2 Litte a (8) a.) What is the limiting reagent and what is the percentage of excess of the excess reagent? b.) Calculate the molar flow rate and composition of the purge stream (stream 7). c.) Calculate the molar flow rate and composition of the fresh feed stream (stream 1)
Transcribed Image Text:in a reactor, benzene is converted to monochlorobenzene (MCB, CeHsCI) according to the following reaction CH6+Cl2CgH;Cl+ HCL In a consecutive reaction, MCB can react with another Clz molecule to form dichlorobenzene (DCB, CeH.Cl2), according to: CHSCI+ Cl C,H,Clz + HCL Refer to the diagram below for a simplistic representation of the process. The feed to this reactor (stream 2) contains a benzene/chlorine mixture with a molar ratio of chlorine to benzene of 1:1.2. This stream also contains a 1.0 mol.% contamination of N. The fractional conversion of benzene in the reactor is 60% and the selectivity of MCB to DCB is 8. The effluent of the reactor is directed to a separation unit (S1), where the liquid products (Benzene, MCB, DCB and HCI) are separated from the gaseous products (Cla and Na). The gaseous stream (stream 5) is partially purged (stream 7) and recycled (stream 6). The purge factor is 4%,. which means that 4% of stream 5 is purged. The liquid stream (stream 4) is sent to another separation unit (S2), where the chloro-containing products (MCB, DCB and HCI) are separated from benzene. Benzene is recycled via stream 8. The two recycle streams (6 and 8) are mixed with the fresh feed (stream 1). Stream 9 is further processed to get the products in its pure form. (6) (7) 004 (5) (9) 100 fisid (4) (1) (2) (3) Reactor S1 S2 Litte a (8) a.) What is the limiting reagent and what is the percentage of excess of the excess reagent? b.) Calculate the molar flow rate and composition of the purge stream (stream 7). c.) Calculate the molar flow rate and composition of the fresh feed stream (stream 1)
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