ELEMENTS OF CHEM. REACTION ENGR
5th Edition
ISBN: 9780135486498
Author: Fogler
Publisher: INTER PEAR
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Textbook Question
Chapter 2, Problem 2.7P
The adiabatic exothermic irreversible gas-phase reaction
is to be carried out in a flow reactor for an equimolar feed of A and B. A Levenspiel plot for this reaction is shown in Figure P2-7B.
Figure P2-7B Levenspiel plot.
- (a) What PFR volume is necessary to achieve 50% conversion?
- (b) What CSTR volume is necessary to achieve 50% conversion?
- (c) What is the volume of a second CSTR added in series to the first CSTR (Part b) necessary to achieve an overall conversion of 80%?
- (d) What PFR volume must be added to the first CSTR (Part b) to raise the conversion to 80%?
- (e) What conversion can be achieved in a 6 × 104 m3 CSTR? In a 6 × 104 m3 PFR?
- (f) Think critically (cf. Preface, Section I, page xxviii) to critique the answers (numbers) to this problem.
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Latihan mandiri
Reaktor fluidisasi menggunakan katalis padat dengan diameter
partikel 0,25 mm, rapat massa 1,50 g/ml, sperisitas 0,90. Pada
kondisi unggun diam, porositas 0,35, tinggi unggun 2 m. Gas
masuk dari bagian bawah reaktor pada suhu 600°C pada
viskositas 0,025 CP serta rapat massa 0,22 lb/cuft. Pada fluidisasi
minimum, porositas tercapai pada 0,45. Hitung
Hitung
a. Laju alir semu minimum (VM) gas masuk kolom fluidisasi !
b. Tinggi unggun jika Vo = 2 VM
c. Pressure drop pada kondisi Vo = 2,5 VM
<
1 m
= 3,28084 ft
1 g/ml
= 62,43 lbm/ft³
1 cp
gc
= 6,7197 × 10-4 lbm/ft.s
= 32,174 ft/s²
=
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