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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Textbook Question
Chapter 18, Problem 18.4P
The elementary liquid-phase reaction
is carried out in a packed-bed reactor in which dispersion is present. What is the conversion?
Additional information:
| Porosity = 50% | Reactor length = 0.1 m |
| Particle size = 0.1 cm | Mean velocity = 1 cm/s |
| Kinematic viscosity = 0.01 cm2/s | Bed fluidicity = 7.3 |
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A mixture of oil and gas flows through a horizontal pipe with an
inside diameter of 150 mm. The respective volumetric flow rates for
the oil and gas are 0.015 and 0.29 m³s-1. Determine the gas void frac-
tion and the average velocities of the oil and gas. The friction factor
may be assumed to be 0.0045. The gas has a density of 2.4 kgm³ and
viscosity of 1 x 10-5 Nsm-2. The oil has a density of 810 kgm³ and
density of 0.82 Nsm². Answer: 0.79, 20.8 ms-1, 4 ms-1
4. An experimental test rig is used to examine two-phase flow regimes
in horizontal pipelines. A particular experiment involved uses air
and water at a temperature of 25°C, which flow through a horizontal
glass tube with an internal diameter of 25.4 mm and a length of 40 m.
Water is admitted at a controlled rate of 0.026 kgs at one end and air
at a rate of 5 x 104 kgs in the same direction. The density of water
is 1000 kgm³, and the density of air is 1.2 kgm3. Determine the mass
flow rate, the mean density, gas void fraction, and the superficial
velocities of the air and water. Answer: 0.02605 kgs 1, 61.1 kgm³, 0.94,
0.822 ms-1, 0.051 ms-1
1. Determine the range of mean density of a mixture of air in a 50:50
oil-water liquid phase across a range of gas void fractions. The den-
sity of oil is 900 kgm³, water is 1000 kgm³, and gas is 10 kgm³.
2. Describe, with the use of sketches, the various flow regimes that can
exist in a vertical pipe carrying two-phase flow (liquid and gas).
Chapter 18 Solutions
Elements of Chemical Reaction Engineering (5th Edition) (Prentice Hall International Series in the Physical and Chemical Engineering Sciences)
Ch. 18 - The second-order liquid-phase reaction AB+C is to...Ch. 18 - The elementary liquid-phase reaction...Ch. 18 - Prob. 18.5PCh. 18 - Use the data in Example 16-2 to make the following...Ch. 18 - A tubular reactor has been sized to obtain 98%...Ch. 18 - Prob. 18.11PCh. 18 - Prob. 18.13PCh. 18 - Prob. 18.14PCh. 18 - Prob. 18.15PCh. 18 - Consider the following system in Figure P18-16C...
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