4. [Thermal oxidiser] In order to meet recently updated pollution regulations for discharging toluene to the atmosphere, a process gas stream must be reduced by 99.5% of its present toluene concentration. Owing to economic considerations, it is proposed to meet this requirement by combusting the toluene in a tubular thermal oxidizer operating at 815.6°C. The process gas and the fuel (methane) are to be fed to the oxidiser at 26.7°C and 1 atm. Based on the supplementary information below and knowing that the oxidation/combustion reaction follows first-order kinetics, calculate the following: a) the diameter of the oxidiser. b) the height of the oxidiser. [Ans: = 1.86 m] [Ans: = 4.15 m] Supplementary information: Exhaust flow rate from the combustion of fuel = 70.8 m³ min¹ @ 26.7 °C and 1 atm; Exhaust flow rate from the combustion of the process gas = 203.9 m³ min¹ @ 26.7 °C and 1 atm; Target average gas velocity through oxidiser = 6.1 m s¹¹; First-order reaction rate constant, k = 7.8 s¹ @ 815.6°C.
4. [Thermal oxidiser] In order to meet recently updated pollution regulations for discharging toluene to the atmosphere, a process gas stream must be reduced by 99.5% of its present toluene concentration. Owing to economic considerations, it is proposed to meet this requirement by combusting the toluene in a tubular thermal oxidizer operating at 815.6°C. The process gas and the fuel (methane) are to be fed to the oxidiser at 26.7°C and 1 atm. Based on the supplementary information below and knowing that the oxidation/combustion reaction follows first-order kinetics, calculate the following: a) the diameter of the oxidiser. b) the height of the oxidiser. [Ans: = 1.86 m] [Ans: = 4.15 m] Supplementary information: Exhaust flow rate from the combustion of fuel = 70.8 m³ min¹ @ 26.7 °C and 1 atm; Exhaust flow rate from the combustion of the process gas = 203.9 m³ min¹ @ 26.7 °C and 1 atm; Target average gas velocity through oxidiser = 6.1 m s¹¹; First-order reaction rate constant, k = 7.8 s¹ @ 815.6°C.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
Related questions
Question
![4. [Thermal oxidiser] In order to meet recently updated pollution regulations for discharging toluene
to the atmosphere, a process gas stream must be reduced by 99.5% of its present toluene
concentration. Owing to economic considerations, it is proposed to meet this requirement by
combusting the toluene in a tubular thermal oxidizer operating at 815.6°C. The process gas and
the fuel (methane) are to be fed to the oxidiser at 26.7°C and 1 atm.
Based on the supplementary information below and knowing that the oxidation/combustion
reaction follows first-order kinetics, calculate the following:
a) the diameter of the oxidiser.
b) the height of the oxidiser.
[Ans: = 1.86 m]
[Ans: = 4.15 m]
Supplementary information:
Exhaust flow rate from the combustion of fuel = 70.8 m³ min¹ @ 26.7 °C and 1 atm;
Exhaust flow rate from the combustion of the process gas = 203.9 m³ min¹ @ 26.7°C and 1 atm;
Target average gas velocity through oxidiser = 6.1 m s¹;
First-order reaction rate constant, k = 7.8 s¹ @ 815.6°C.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fde55ad6b-27eb-44c5-bca1-afdb32f2dfc7%2F1780c2d5-3356-4b22-944c-6e98e2ee329f%2Fgw2n7ge_processed.png&w=3840&q=75)
Transcribed Image Text:4. [Thermal oxidiser] In order to meet recently updated pollution regulations for discharging toluene
to the atmosphere, a process gas stream must be reduced by 99.5% of its present toluene
concentration. Owing to economic considerations, it is proposed to meet this requirement by
combusting the toluene in a tubular thermal oxidizer operating at 815.6°C. The process gas and
the fuel (methane) are to be fed to the oxidiser at 26.7°C and 1 atm.
Based on the supplementary information below and knowing that the oxidation/combustion
reaction follows first-order kinetics, calculate the following:
a) the diameter of the oxidiser.
b) the height of the oxidiser.
[Ans: = 1.86 m]
[Ans: = 4.15 m]
Supplementary information:
Exhaust flow rate from the combustion of fuel = 70.8 m³ min¹ @ 26.7 °C and 1 atm;
Exhaust flow rate from the combustion of the process gas = 203.9 m³ min¹ @ 26.7°C and 1 atm;
Target average gas velocity through oxidiser = 6.1 m s¹;
First-order reaction rate constant, k = 7.8 s¹ @ 815.6°C.
Transcribed Image Text:The height and diameter of a thermal oxidiser tower,
Z and D respectively, are determined by:
Z = U. Tr
D =
4 Qexhaust
πυ
Where:
u = superficial velocity through the tower
t₁ = reaction time needed for adequate conversion
Qexhaust = exhaust volumetric flow rate (outlet of oxidiser)
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 4 steps with 16 images
Recommended textbooks for you
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Industrial Plastics: Theory and Applications
Chemical Engineering
ISBN:
9781285061238
Author:
Lokensgard, Erik
Publisher:
Delmar Cengage Learning
Unit Operations of Chemical Engineering
Chemical Engineering
ISBN:
9780072848236
Author:
Warren McCabe, Julian C. Smith, Peter Harriott
Publisher:
McGraw-Hill Companies, The