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This question concerns the following elementary liquid-phase reaction: 2A → B

This question concerns the following elementary liquid-phase reaction: 2A → B

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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1. This question concerns the following elementary liquid-phase reaction: 2A — В (a) The reaction is to be carried out in a reactor network of two identical isothermal CSTRS positioned in series. The feed is pure A and the conversion at the outlet of the second reactor must be 0.95. (i) Determine the conversion at the outlet of the first reactor. (ii) Determine the space time required for each of the reactors. (b) The reactor network is set up as described above and monitored for potential issues. Consider the following two scenarios and for each case, suggest reasons for the observed behaviour (with justification) and propose possible solutions. (i) Steady state is achieved but the conversions in the two vessels remain below the values detailed in part (a). Measurements show that the reactor temperature varies throughout the two vessels. (ii) Steady state is achieved, and the required conversions are achieved in each of the two vessels. However, the conversions decrease with time. Measurements show that the reactor temperature is equal and constant throughout the two vessels. Data: 1 FA0 = 4 mol min- -3 CAO = 0.5 mol dm k = 4.5 [mol dm1'min-1
Transcribed Image Text:1. This question concerns the following elementary liquid-phase reaction: 2A — В (a) The reaction is to be carried out in a reactor network of two identical isothermal CSTRS positioned in series. The feed is pure A and the conversion at the outlet of the second reactor must be 0.95. (i) Determine the conversion at the outlet of the first reactor. (ii) Determine the space time required for each of the reactors. (b) The reactor network is set up as described above and monitored for potential issues. Consider the following two scenarios and for each case, suggest reasons for the observed behaviour (with justification) and propose possible solutions. (i) Steady state is achieved but the conversions in the two vessels remain below the values detailed in part (a). Measurements show that the reactor temperature varies throughout the two vessels. (ii) Steady state is achieved, and the required conversions are achieved in each of the two vessels. However, the conversions decrease with time. Measurements show that the reactor temperature is equal and constant throughout the two vessels. Data: 1 FA0 = 4 mol min- -3 CAO = 0.5 mol dm k = 4.5 [mol dm1'min-1
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