ChE 201
Chemical Engineering Calculations I
Fall 2005/2006
Course Description:
System of units and dimensions.
Stoichiometry. Ideal and non-ideal gases,
critical properties and compressibility
charts.Vapor-Liquid equilibria. Material
balance calculations for steady and
unsteady state processes with and
without chemical reaction.
My name is
Dr.
Faisal Iskanderani
Instructor: Dr. Faisal Iskanderani
Tutorial assistance: Engr Sayed Hammoda
Office: Main Library, Dean’s Office
Office Hours: Sat 9:00-10.30
Mon 12:00-1:30
ChE 201
Chemical Engineering Calculations I
Fall 2005/2006
Course Description:.
Recycle, by-pass and purge calculations.
Process flow sheeting with computer
applications
Text Book: David Himmelblau, Basic
Principles and Calculations in Chemical
Engineering, Prentice Hall PTR, 7th
Edition 2003.
Reference: Fedler, Elementary
Principles of Chemical Processes, John
Wiley, 1998
Course Goals: The overall goal of this
course is to introduce students to the
fundamentals of chemical engineering,
material balance
Specific instructional goals
•Demonstrate the ability to apply knowledge
of mathematics and freshman chemistry to
solve material balance problems.
Reference: Fedler, Elementary
Principles of Chemical Processes, John
Wiley, 1998
Specific instructional goals
• Function on teams to solve problems.
• Use computers to solve material
balance problems.
Topics:
•Introduction (3 weeks)
•Units & Dimensions
•Dimensional consistency
•The mole unit
•Density, Specific gravity, sp. Volume,
mole fraction, mass fraction, Volume
fraction
•Analyses of mixtures : mole %, mass
%, volume %,
•Concentrations of solutions,
mass/unit volume, PPM, molar, molal ,
Topics:
•How do we take a basis?
•Temperature, and Pressure
•Stoichiometry
•Problem Solving Techniques (1.5 week)
•Material Balance (6 weeks)
•General material balance equation
•How to analyse MB Problems
•MB for non- reaction problems
•Reaction Problems
•Multiple subsystems
Topics:
•Recycle, Bypass and Purge
•Material Balance (MB) for Gases,
Vapors, and Solids (4.5 weeks)
•Ideal gas law for a single gas
•Ideal gas law for gas mixtures
•Material Balance for gases
•Real gas Relationships
•Vapor pressure and liquids
•Saturation
•Equilibria
Topics:
•Equilibria
•Partial saturation
•MB involving Condensation and
Vaporization
Computer Usage:
• some homework assignment
using accompanying CD
using Excel Sheet
HOMEWORK:
For every homework problem assigned –
unless other instructions are given- the
following format is to be used:
•Write down the problem statement
•State the objective of the problem
•Define the problem. Sketch, label, and state
precisely what you want to find out.
•Briefly write down how you want to solve the
problem (the method).
•Carry out the solution.
•Review the results . Do you have any comments
on the answers or on the problem? State them.
Course Assessment:
• Homework
• Computer Assignments
• Quizzes
• 3 Midterm Exams
• Final Exam
10%
5%
15%
35%
35%
Attendance:
1. 25% absence will result into a DN
grade. 25% of (2 lectures + 1 tutorial) x 15 = 11
2. Maximum lateness allowed is 5 minutes.
If you come more than 5 minutes late, you
will be allowed to attend class, but you will
be considered late. Each 2 late
attendances will be considered as 1
absence.
Course Conduct Codes : In all aspects of
the course honesty and trust are a must.
Any violations will be severely confronted.
You will be working in class as follows:
• individually
• As a team
For homework, quizzes and exams
you must work individually
LET US NOW CONSTRUCT THE TEAMS
EACH ONE MUST DO HIS DUTY
INTRODUCTION
Individually:
Take 5 minutes and write down “ What
do you know about Chemical
Engineering, what processes does
chemical engineering involve?
INTRODUCTION
As a team:
Take 5 minutes and write down “ What
do you know about Chemical
Engineering, what processes does
chemical engineering involve?
INTRODUCTION
Processes involved in ChE
 mixing
 separation
- distillation absorption freezing
extraction (heat mass and momentum transfer)
 chemical reactions
What is the difference between a
chemical engineer and a chemist?
Chemist:
- works in test tubes
-small quantities
-batch constant-T experiments
-small containers
-a catalyst is added and reactions
proceed with time
A CHEMICAL Engineer:
- works with large
quantities
- large equipment
- continuous mode
- feed streams and product streams
are continuously fed and withdrawn
from the process
-steady state operations (all
parameters such as T, P, liquid livel,
flow rates, compositions, etc. are all
constant with time
CHEMICAL Engineer:
-scaling up
- works closely with mechanical,
electrical, civil, and metallurgical
engineers in order to design and
operate the physical equipment in a
plant ( such as: ? )
• What are the typical activities a
chemical engineer works with?
1. DEVELOPMENT : to commercialize
(scale up) a chemical process
Lab size process  pilot plant  plant
2.DESIGN : A team of engineers design the
commercial plant, based on experience and
data obtained from the Lab size process and
the pilot plant. The Chem E specifies:
Process flow rates and conditions
Equipment types and sizes
Materials of constructions
Process configuration
Control systems
Safety systems
Other
3.CONSTRUCTION : Assembling of all
components into a complete plant
4.MANUFACTURING : running the plant
or operations and production. Things that
are important and relevant:
efficiency
safety
design modifications
reduce costs
improve product quality
reduce pollution
5. TECHNICAL SALES
6. RESEARCH
18.
Homework due next Saturday
13/8/1426 (17/9/2005)
• Read Chapter 1
• Solve Problems 1, 5, 9, 14, 18, 23, 28, 33,
38, 43, 48, 52, 55