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Chapter 2, Problem 2.8P
Interpretation Introduction

Interpretation:

The reactor volume of the two CSTRs and the PFR has to be estimated.

Concept introduction:

Plug–flow reactor: It is type of continuous flow reactor which is operator under steady state. It is the system where flow field modeled by that of plug–flow profile which will have no radial variation in reaction rate.

Elements of Chemical Reaction Engineering (5th Edition) (Prentice Hall International Series in the Physical and Chemical Engineering Sciences), Chapter 2, Problem 2.8P

The ideal plug flow reactor depends only on total volume but not on its shape.

The mole balance for plug flow reactor in integral form is represented as follows,

    V=FA0XinXoutdXrA

Continuous–stirred tank reactors (CSTR): It is type of continuous flow reactor which is commonly used in industrial processes. It is also known as back mix reactor which used for reactions in liquid phase.

The design equations for CSTR in algebraic form is V=FA0XrA

In terms of conversion, the differential and integral forms of the reactor design equations become,

DifferentialFormAlgebricFormIntegralformCSTRV=FA0(Xout-Xin)(-rA)outPFRFA0dX(dV)=-rAV=FA0XinXoutdX(-rA)

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