Problem 2. For an irreversible liquid phase reaction A -> B, the reaction rate is of the first order with respect to the reactant concentration C_A. this reaction is performed in a cascade of two identical CSTRs at 100 degrees Celsius. (same reactor size and isothermal). The inlet concentration of A of the first CSTR is 2mol/L. The outlet concentration of A of the 2nd CSTR is 0.5 mol/L. the inlet flow rate of the 1st reactor is 100 L/h. and the feed temperature is 20 degrees Celsius. The average heat capacity of the reactant/product/solvent mixture is a constant: 2J/g*K, the density of the mixture is a constant: 1 kg/L. The heat of reaction is 50 kJ/mol (exothermic). The reaction rate constant at 100 degrees Celsius is 0.5/h. (a) Determine the outlet concentration of A of the first CSTR (b) What is the heat transfer requirement for the first CSTR? (c) if this reaction is performed in a plug-flow reactor, what is the size of plug-flow reactor required for achieving the same conversion (75%)? The inlet flow rate and operating temperature (isothermal) remain the same as CSTR. Briefly show the procedure.
Problem 2. For an irreversible liquid phase reaction A -> B, the reaction rate is of the first order with respect to the reactant concentration C_A. this reaction is performed in a cascade of two identical CSTRs at 100 degrees Celsius. (same reactor size and isothermal). The inlet concentration of A of the first CSTR is 2mol/L. The outlet concentration of A of the 2nd CSTR is 0.5 mol/L. the inlet flow rate of the 1st reactor is 100 L/h. and the feed temperature is 20 degrees Celsius. The average heat capacity of the reactant/product/solvent mixture is a constant: 2J/g*K, the density of the mixture is a constant: 1 kg/L. The heat of reaction is 50 kJ/mol (exothermic). The reaction rate constant at 100 degrees Celsius is 0.5/h. (a) Determine the outlet concentration of A of the first CSTR (b) What is the heat transfer requirement for the first CSTR? (c) if this reaction is performed in a plug-flow reactor, what is the size of plug-flow reactor required for achieving the same conversion (75%)? The inlet flow rate and operating temperature (isothermal) remain the same as CSTR. Briefly show the procedure.
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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Transcribed Image Text:Problem 2. For an irreversible liquid phase reaction A -> B, the reaction rate is of the first
order with respect to the reactant concentration C_A. this reaction is performed in a
cascade of two identical CSTRs at 100 degrees Celsius. (same reactor size and
isothermal). The inlet concentration of A of the first CSTR is 2mol/L. The outlet
concentration of A of the 2nd CSTR is 0.5 mol/L. the inlet flow rate of the 1st reactor is 100
L/h. and the feed temperature is 20 degrees Celsius. The average heat capacity of the
reactant/product/solvent mixture is a constant: 2J/g*K, the density of the mixture is a
constant: 1 kg/L. The heat of reaction is 50 kJ/mol (exothermic). The reaction rate constant
at 100 degrees Celsius is 0.5/h.
(a) Determine the outlet concentration of A of the first CSTR
(b) What is the heat transfer requirement for the first CSTR?
(c) if this reaction is performed in a plug-flow reactor, what is the size of plug-flow
reactor required for achieving the same conversion (75%)? The inlet flow rate and
operating temperature (isothermal) remain the same as CSTR. Briefly show the
procedure.
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