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Chapter 15, Problem 15.11P

(a)

Interpretation Introduction

Interpretation:

The derived expressions for the concentration profile and effectiveness factor for the cylindrical pellets by assuming the first-order isomerization are to be stated.

Concept introduction:

The effectiveness factor is the division of the average rate of the reaction with rate of reaction at the bulk-stream point that is at boundary conditions or without diffusion. It is denoted by η.

(b)

Interpretation Introduction

Interpretation:

The rework of problem P15-10c by using the diameter of cylindrical pellets as 0.2cm for the second order decomposition reaction is to be stated.

Concept introduction:

The full form of PFR is Plug-Flow Reactor which consists of a cylindrical pipe and it is used for the gas-phase reactions. It is also known as tubular reactor.

The conversion, X can be defined as the moles of any species A that are reacted per mole of A fed in the reactor.

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