Elements of Chemical Reaction Engineering (5th Edition) (Prentice Hall International Series in the Physical and Chemical Engineering Sciences)
5th Edition
ISBN: 9780133887518
Author: H. Scott Fogler
Publisher: Prentice Hall
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Question
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
(b)
Interpretation Introduction
Interpretation:
The rework of problem
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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One thousand kg/h of a (50-50 wt%) acetone-in-water solution is to be extracted at 25C in a continuous,
countercurrent system with pure 1,1,2-trichloroethane to obtain a raffinate containing 10 wt% acetone. Using the
following equilibrium data, determine with an equilateral-triangle diagram:
a the minimum flow rate of solvent;
b. the number of stages required for a solvent rate equal to 1.5 times minimum, and composition of each
streamleaving each stage.
Repeat the calculation of (a) and (b) if the solvent used has purity 93wt% (4wr% acetone, 3wt% water
impurities)
acetone
0.6
water
0.13
1,1,2-trichloroethane
0.27
Raffinate. Weight
Fraction Acetone
Extract. Weight
Fraction Acetone
0.5
0.04
0.46
0.44
0.56
0.4
0.03
0.57
0.29
0.40
0.3
0.02
0.681
0.12
0.18
0.2
0.015
0.785
0.0
0.0
0.1
0.01
0.89
0.55
0.35
0.1
0.5
0.43
0.07
0.4
0.57
0.03
0.3
0.68
0.02
0.2
0.79
0.01
0.1
0.895
0.005
Chapter 15 Solutions
Elements of Chemical Reaction Engineering (5th Edition) (Prentice Hall International Series in the Physical and Chemical Engineering Sciences)
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