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Problem 3 Methane reacts with chlorine (atomic weight 35.5) to produce methyl chloride (CH3CI) and hydrogen chloride (HCI). Once formed, the methyl chloride may undergo further 14 chlorination to form methylene chloride (CH2Cl2), chloroform (CHCI3), and carbon tetrachloride (CCI4) in different reaction steps. A carbon tetrachloride production process consists of a reactor and a separator system. A gas stream containing 90 mole % chlorine and the balance methane is fed to the reactor. In the reactor a single-pass methane conversion of essentially 100% is attained, the mole ratio of carbon tetrachloride to chloroform in the reactor product is 4:1, and negligible amounts of methyl chloride and methylene chloride are formed. The product stream flows to a separator, from which two streams emerge: a liquid, which contains essentially all of the carbon tetrachloride and chloroform in the reactor effluent, and the gas containing the chlorine and hydrogen chloride. (а) Write the chemical equations of the four reactions of methane chlorination and give the two main overall reactions ignoring the ones producing negligible amounts. (b) Explain the reason for the chlorine presence in the reactor outlet stream. (c) Using a basis of 100 kmol.h' combined feed to the reactor, calculate the molar flow rate and molar composition of the reactor outlet.

Problem 3 Methane reacts with chlorine (atomic weight 35.5) to produce methyl chloride (CH3CI) and hydrogen chloride (HCI). Once formed, the methyl chloride may undergo further 14 chlorination to form methylene chloride (CH2Cl2), chloroform (CHCI3), and carbon tetrachloride (CCI4) in different reaction steps. A carbon tetrachloride production process consists of a reactor and a separator system. A gas stream containing 90 mole % chlorine and the balance methane is fed to the reactor. In the reactor a single-pass methane conversion of essentially 100% is attained, the mole ratio of carbon tetrachloride to chloroform in the reactor product is 4:1, and negligible amounts of methyl chloride and methylene chloride are formed. The product stream flows to a separator, from which two streams emerge: a liquid, which contains essentially all of the carbon tetrachloride and chloroform in the reactor effluent, and the gas containing the chlorine and hydrogen chloride. (а) Write the chemical equations of the four reactions of methane chlorination and give the two main overall reactions ignoring the ones producing negligible amounts. (b) Explain the reason for the chlorine presence in the reactor outlet stream. (c) Using a basis of 100 kmol.h' combined feed to the reactor, calculate the molar flow rate and molar composition of the reactor outlet.

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
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Problem 3 Methane reacts with chlorine (atomic weight 35.5) to produce methyl chloride (CH3CI) and hydrogen chloride (HCI). Once formed, the methyl chloride may undergo further 14 chlorination to form methylene chloride (CH2CI2), chloroform (CHCI3), and carbon tetrachloride (CCI4) in different reaction steps. A carbon tetrachloride production process consists of a reactor and a separator system. A gas stream containing 90 mole % chlorine and the balance methane is fed to the reactor. In the reactor a single-pass methane conversion of essentially 100% is attained, the mole ratio of carbon tetrachloride to chloroform in the reactor product is 4:1, and negligible amounts of methyl chloride and methylene chloride are formed. The product stream flows to a separator, from which two streams emerge: a liquid, which contains essentially all of the carbon tetrachloride and chloroform in the reactor effluent, and the gas containing the chlorine and hydrogen chloride. (a) Write the chemical equations of the four reactions of methane chlorination and give the two main overall reactions ignoring the ones producing negligible amounts. (b) Explain the reason for the chlorine presence in the reactor outlet stream. (c) Using a basis of 100 kmol.h' combined feed to the reactor, calculate the molar flow rate and molar composition of the reactor outlet.
Transcribed Image Text:Problem 3 Methane reacts with chlorine (atomic weight 35.5) to produce methyl chloride (CH3CI) and hydrogen chloride (HCI). Once formed, the methyl chloride may undergo further 14 chlorination to form methylene chloride (CH2CI2), chloroform (CHCI3), and carbon tetrachloride (CCI4) in different reaction steps. A carbon tetrachloride production process consists of a reactor and a separator system. A gas stream containing 90 mole % chlorine and the balance methane is fed to the reactor. In the reactor a single-pass methane conversion of essentially 100% is attained, the mole ratio of carbon tetrachloride to chloroform in the reactor product is 4:1, and negligible amounts of methyl chloride and methylene chloride are formed. The product stream flows to a separator, from which two streams emerge: a liquid, which contains essentially all of the carbon tetrachloride and chloroform in the reactor effluent, and the gas containing the chlorine and hydrogen chloride. (a) Write the chemical equations of the four reactions of methane chlorination and give the two main overall reactions ignoring the ones producing negligible amounts. (b) Explain the reason for the chlorine presence in the reactor outlet stream. (c) Using a basis of 100 kmol.h' combined feed to the reactor, calculate the molar flow rate and molar composition of the reactor outlet.
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