ELEMENTS OF CHEM. REACTION ENGR
5th Edition
ISBN: 9780135486498
Author: Fogler
Publisher: INTER PEAR
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Question
Chapter 18, Problem 18.11P
(a)
Interpretation Introduction
Interpretation:
The conversion of the tank-in series model is to be stated.
Concept introduction:
A model that is used to explain the behavior of the electrolytic flow within the electrochemical reactor’s tank which is continuously stirred is known as tank-in-series model.
(b)
Interpretation Introduction
Interpretation:
The peclet number for a closed-closed system is to be stated.
Concept introduction:
The number that is utilizes in the calculation which includes convective heat transfer is as known peclet number. This number is dimensionless. This number represents the ratio of converted thermal energy to the fluid and to the conducted thermal energy of the fluid.
(c)
Interpretation Introduction
Interpretation:
The conversion of the dispersion model is to be stated.
Concept introduction:
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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Problem 1
Marks: 60
Section: 1a): 30 marks, Section 1b):30 marks
A laboratory scale fluidized bed is considered for studying a catalytic ozone decomposition.
a) It is requested to derive model equations under the following assumptions:
■ Operation of the catalytic reactor under steady state conditions,
There is no influence of thermal ozone decomposition reactions.
The fluidized bed includes bubbles and dense phase.
□ The dense phase can be simulated using a CSTR
The fluidized bed bubbles contain catalyst particles and can be simulated as a DSTR (batch).
□ The jets contain particles and can be simulated with a PFR.
The influence of the freeboard has to be considered using a PFR model.
The available catalytic reaction rate model is r (moles/gcat.s)= -k CA
b) Same than on a) under unsteady state conditions, using an absorbable and reactive tracer.
Note: A step-by step derivation of the model equations is required here. A quick answer will not do.
Problem 2 Marks: 40
Section 2a: 30 marks,…
Penicillin process
Penicillium chrysogenum is used to produce penicillin in a 90,000-litre fermenter. The volumetric rate of oxygen uptake by the cells ranges from 0.45 to 0.85 mmol l^−1 min^−1 depending on time during the culture. Power input by stirring is 2.9 W l^−1. Estimate the cooling requirements.
Production of bakers’ yeast
Bakers’ yeast is produced in a 50,000-litre fermenter under aerobic conditions. The carbon substrate is sucrose; ammonia is provided as the nitrogen source. The average biomass composition is CH_1.83O_0.55N_0.17 with 5% ash. Under conditions supporting efficient growth, biomass is the only major product and the biomass yield from sucrose is 0.5 g g^−1. If the specific growth rate is 0.45 h^−1, estimate the rate of heat removal required to maintain constant temperature in the fermenter when the yeast concentration is 10 g l^−1.
Chapter 18 Solutions
ELEMENTS OF CHEM. REACTION ENGR
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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