Continuum Mechanics
The scienze of fluid dynamics describes the motions of liquids and gases and their interaction xith solid bodies. There are many ways to further subdivide fluid dynamics
into special subjects. The plan of this book is to make the divis
CN5050 Advanced Separation Processes
Assignment #1: Review of basic concepts
Test date: February 05, 2013
Lecture 1: Concept of diffusion, Fick's laws and their applications in modeling diffusional
processes.
1. Stagnant water (1 m deep) at 25oC stands on
CN5050 Advanced Separation Processes
Assignment #3: Adsorption
Test date: March 26, 2013
1. Adsorption of soluble organic compounds with activated carbon to purify surface and ground
water is a proven technology. The less soluble organic compounds, such a
CN5050 Advanced Separation Processes
Assignment #2: Absorption with Chemical Reaction
Test date: March 05, 2013
1. Gas side mass transfer coefficient for an absorption system is reported as 0.01
and that of the liquid side is given as 1
moles
cm2 s
moles
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CN5050 Advanced Separation Processes
Assignment #4: Membrane Separation Processes
Test date: April 16, 2013
1. A reverse osmosis plant has been designed to treat sea water to supply potable water to
a small fishing community of 1000 people living in a rem
Molecular Diffusion
(Chapter 2 of the Text)
Molecular diffusion is caused by random molecular motion
Follows FICK'S LAW OF DIFFUSION
1st Law
2nd Law
Cartesian coordinates (one dimensional diffusion)
dc
-j=D
dz
2c
c
=D
t
z 2
(constant area)
Cylindrical co
Mixing
B
Liquid A
Separation
Opposite of mixing
Also taught as Unit Operations or Mass Transfer Operations
S Farooq/Advanced Separation Processes- Introduction
1
Why study separation?
A typical chemical plant involves several separation operations
Und
Mass Transfer Coefficient
(Chapter 8 of the text)
Diffusional mass transfer can be analyzed in two different ways:
Full or approximate solution of the actual diffusion process using Ficks Law and
diffusion coefficient.
Using Mass Transfer Coefficient an
Axial Dispersion
Combined effect of diffusion and forced convection causes deviation from plug flow.
Deviation from plug flow affects separation process.
Deviation from plug flow also affects some of the experimental methods used to
measure diffusivity
Application of Mass Transfer Coefficient in Separation Process Design
Mass transfer coefficient is useful because it describes how fast the separation occurs.
It is a step beyond thermodynamics, which establishes the maximum separation that is
possible.
M
Diffusion in Porous Media
(Chapter 6 of the Text)
Mathematically, diffusion in porous media may also be described by the same type of
diffusion equations as in homogeneous medium, i.e., FICK'S LAW also applies in
porous media
Our focus here is estimation
Diffusion Coefficients in Gases and Liquids
(Chapter 5 of the Text)
Measurement:
Diffusion coefficients in liquids and gases may be measured from both steady state
and unsteady state experiments:
Steady state: design an experiment to measure concentratio
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ARTICLE
pubs.acs.org/IECR
Fuel Reformation and Hydrogen Generation with Direct Droplet
Impingement Reactors: Model Formulation and Validation
Mark J. Varady and Andrei G. Fedorov*
Multiscale Integrated Thermouidics Research Laboratory, GWW School of Mecha
R ESEARCH ARTICLE
ScienceAsia 27 (2001) : 193-198
Hydrogen Production by
Catalytic Ethanol Steam Reforming
Apichai Therdthianwong*, Tawee Sakulkoakiet and Supaporn Therdthianwong
Chemical Engineering Practice School, Faculty of Engineering, King Mongkuts
Hydrogen Production from Ethanol for Fuel Cell
Applications
D.Kunzru
Department of Chemical Engineering, I.I.T.Kanpur, Kanpur-208016
Email: dkunzru@iitk.ac.in
Ethanol is a renewable resource as it can be produced from biomass without
contributing to the g
Max Planck was born in Kiel, Germany (then Prussia) on April 23, 1858, and died in 1948.
He showed early talent in both music and science. He received his PhD. in theoretical physics
in 1879 at the University of Munich for his dissertation on the second l
ETHANOL STEAM REFORMING IN A
MICROCHANNEL REACTOR
Y. Men , G. Kolb, R. Zapf, V. Hessel and H. Lowe
Institut fur Mikrotechnik Mainz GmbH (IMM), Mainz Germany.
Abstract: The reaction between ethanol and water was studied in the temperature range of
400 6008
Digestion Strategies in Nectar- and Fruit-Eating Birds and the Sugar Composition of Plant
Rewards
Author(s): Carlos Martinez del Rio and William H. Karasov
Source: The American Naturalist, Vol. 136, No. 5 (Nov., 1990), pp. 618-637
Published by: The Univer
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CHAPTER 1
STATISTICAL-MECHANICAL ENSEMBLES AND
THERMODYNAMICS
11 Introduction. The object of thermodynamics is to derive mathe
matical relations which connect different e
CN5020/6020: Advanced Reaction Engineering
(Supplementary lecture material)
Dynamical Systems Analysis
October 2012
Saif A. Khan
(chesakk@nus.edu.sg)
Outline
Dynamical systems: stability and multiplicity
Linear dynamical systems
State-space formalism
Lin
ARTICLE
pubs.acs.org/IECR
Fuel Reformation and Hydrogen Generation with Direct Droplet
Impingement Reactors: Parametric Study and Design Considerations
for Portable Methanol Steam Reformers
Mark J. Varady and Andrei G. Fedorov*
Multiscale Integrated Therm
Linear stability analysis
In this short tutorial problem, we will try to understand some of the key concepts in
linear stability analysis. We have discussed the example of a suspended pendulum in
lecture. We will now attempt to model the motion of such a
Chemical reactor stability
In this problem, we will analyze the complex dynamic behavior arising from a
structurally simple system: the adiabatic CSTR.
Consider an adiabatic CSTR where the following liquid phase first order reaction
takes place:
"# B
A"
k
Chapter 3
Non-ideal Gases
This chapter is devoted to considering systems where the interactions between particles can no longer be ignored. We note that in the previous
chapter we did indeed consider, albeit briefly, the effects of interactions in
fermion