CL-301: Solid and Fluid Solid
Operations
Storage and Conveying of Bulk Solids
Properties of masses of particles
Dry and non-sticky particles have many of properties of a fluid
Exert pressure on the sides and walls of container
Flow through opening
They al
The continuity equation can be written as:
vx
v
2c
v y
c A
c
c
v
2cA 2cA
v y A vz A c A x
z DAB 2A
2
x
x
x
y
z
y
z
y
z 2
c A
t
RA
since DAB cannot be zero, the equation reduces to:
2cA
0
x 2
It is second order differential equation which c
the above partial differential equation is solved by combination of variables and converting it
into the non-dimensional form as follows:
let
c A c A0
c Ai c A 0
the equation and the boundary conditions becomes
2
DAB 2 ;
t
x
also let
t 0, 0;
x 0 1;
x
t0
Effect of temperature and pressure on diffusivity:
For the gases the dependence of temperature and pressure on diffusivity can be well predicted
by the kinetic theory of gases and law of corresponding state. The following expression is
obtained for the bi
Mass Transfer Coefficient
MASS TRANSFER COEFFICIENT
Mass transfer coefficient is characteristics that describes the rate of mass transfer. It is helpful
in evaluating the mass transfer rate. Usually two types, F-type and k-type, mass transfer
coefficients
CONTINUITY EQUATION FOR MASS TRANSFER OPERATIONS
Consider a fluid element in rectangular coordinate through which mass transfer is taking
place, as shown in the figure below. The component A flows in all the three directions due to
diffusion as well as bu
General Introduction
INTRODUCTION
In a chemical process industry, usually three types of transfer operations take place.
Momentum transfer operation: It is caused by the bulk movement of the fluid from one
spatial location to another spatial location due
Diffusional Mass Transfer
DEFINITIONS
Concentration:
As discussed earlier, transfer of mass is caused by the transfer of molecules of a species from
one location to another from higher to lower concentration. The concentration of a species in
a mixture is
Gas Solid: The classification again depends on how the components distribute in
two phases:
When all components distribute in both phases, the operation is known as
fractional sublimation or desublimation depending on the transfer direction.
The other p
This equation is used to evaluate the mass transfer rate if all the terms on right hand side are
known. The ratio NA / (NA + NB) on the right side is always a constant for all practical
situation.
Two most common situations are:
1. Steady state diffusion
CE 561 Lecture Notes
Fall 2009
Day 23: The ideal plug flow reactor
The next idealized reactor configuration we will consider is the ideal plug flow tubular reactor.
In this model, we assume that the reactor is a tube in which the velocity is in the axial
CE 561 Lecture Notes
Fall 2009
Day 19: Review for 1st Exam
Here, I will attempt to outline what we have covered during the first half of the course. This
completes the portion of the course devoted to reaction kinetics. After the exam, we will begin
the r
CL-301: Solid and Fluid Solid Operations
Chapter 1: Properties and Handling of
Particulate Solids
Instructor: Dr. Nanda Kishore
Department of Chemical Engineering
Indian Institute of Technology Guwahati
Assam-781039, India
Email: [email protected]
Pa
CL 301: Solid and Fluid Solid Operations
Chapter 4: Filtration
Instructor:
Instructor: Dr. Nanda Kishore
Department of Chemical Engineering
Indian Institute of Technology Guwahati
Assam 781039, India
Email: [email protected]
Filtration
Filtration
It
CL
Fluid
CL301: Solid and FluidSolid Operations
Chapter
Chapter6: Centrifugal Separations
Instructor:
Instructor: Dr. Nanda Kishore
Department of Chemical Engineering
Indian Institute of Technology Guwahati
Assam 781039, India
Email: [email protected]
CE 561 Lecture Notes
Fall 2009
Days 1 and 2: Introduction and Overview
Motivation for understanding chemical kinetics and reaction design:
This is what makes us chemical engineers the reactor is the central feature of most
chemical processes. Even if sepa
CE 561 Lecture Notes
Fall 2009
Day 4: Laplace transform methods for solving rate equations; Stochastic (kinetic Monte
Carlo) methods for modeling reacting systems
Preliminary comments:
Matrix methods discussed last week work only for linear differential e
CE 561 Lecture Notes
Fall 2009
Days 6 and 7: Sensitivity Analysis and Data Fitting to Extract Rate Parameters
Extracting rate parameters from concentration vs. time profiles
A common task in chemical kinetics and reaction engineering is to perform laborat
CE 561 Lecture Notes
Fall 2009
Day 11: Transition State Theory
In the last set of lecture notes, we arrived at the conclusion that we know how to, in principle,
calculate rate parameters from first principles by deriving a potential surface from the solut
CE 561 Lecture Notes
Fall 2009
Day 13: Estimation methods for thermochemical and rate parameters
To apply transition state theory and the various unimolecular rate theories, we need to know
something about the structure and energies of the reactant(s), pr
DEPARTMENT OF CHEMICAL ENGINEERING
Course Number and Title
Credits
Course Category
Pre-requisite(s)
Contact Hours (L-T-P)
Type of Course
Course Assessment
CH 313/PK 313N, Mass Transfer Operations
04
Departmental Core (DC)
CH 211/PK 211, AM 241
3-1-0
Theor