calculation in chemical process
Tài liệu MASS TRANSFER IN CHEMICAL ENGINEERING PROCESSES pdf
Ngày tải lên :
16/02/2014, 19:20
... Wesselingh, J.A., The Maxwell – Stefan approach to mass transfer,
Chemical Engineering Science, 52, (1997), 861 – 911
[5] Levenspiel, O., Modeling in chemical engineering, Chemical Engineering ... permeabilty in terms of solubility and
diffusivity,
D , (Ashley, 1985).
MASS TRANSFER
IN CHEMICAL
ENGINEERING PROCESSES
Edited by Jozef Markoš
Mass Transfer in Chemical Engineering Processes ... presented in Fig. 3. As
seen in Fig.3, decreasing in radius of filament causes increasing in the rate of saturating.
0 200 400 600 800 1000
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
c
t
/c
inf
time...
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encyclopedic dictionary of named processes in chemical technology
Ngày tải lên :
01/04/2014, 10:14
... Normann,
SHP, Unifining, Unionfining.
catalytic reforming A process for converting linear aliphatic hydrocarbons into a mixture
of branched-chain aliphatic hydrocarbons, and aromatic hydrocarbons, in order ... Aromizing, Catforming,
Cycloversion, Hydroforming, Iso-Plus Houdriforming, Magnaforming, Orthoforming,
Platforming, Powerforming, Rheniforming, SBK, Silamit P3, Sinclair-Baker, SMDS,
Sovaforming, ... 109.
Hu, Y. C., in Chemical Processing Handbook, Marcel Dekker, New York, 1993, 768.
actiCAT A process for pre-sulfurizing hydrotreating catalysts. Pre-sulfurizing differs from
pre-sulfiding in that...
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process control a first course with matlab cambridge series in chemical engineering
Ngày tải lên :
01/04/2014, 10:57
... way to find the solutions.
✑ 2.8.1 A Transient Response Example
We routinely test the mixing of continuous flow stirred-
tanks (Fig. 2.6) by dumping some kind of inert tracer, say a
dye, into the ... point is that
integral action can be introduced by the process and we do not need PI control under such
circumstances. We come across processes with integral action in the control of rotating ... apply the final value theorem without thinking, we would get a
value of 0, but this is meaningless. With MATLAB, we can use
roots([1 1 -4 -4])
to find that the polynomial in the denominator has...
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process dynamics modeling and control topics in chemical engineering
Ngày tải lên :
01/04/2014, 11:11
... design
in
practical engineering terms.
Control
system
design
for multivariable processes
having
interactions is
introduced
in
Part
IVB
(Chapters
20-22).
Methods
of
characterizing ...
systems), on-line
intelligence,
and
computer-aided-design
of
control systems. The practicing
control
engineer
will
find these approaches already
in
place in
some
industrial
control ...
WILUAM
B.
RUSSEL
Princeton
University
Receptors:
Models
for Binding, Trafficking,
and
Signalling
D.
Lauffenburger
and
f.
Lindennan
Process
Dynamics,
Modeling,
and
Control
B....
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AEROSOL CHEMICAL PROCESSES IN THE ENVIRONMENT - CHAPTER 1 pot
Ngày tải lên :
18/06/2014, 19:20
... particles in several force fields, and considers the single particle to be chemically
inert, aerosol chemistry involves the physicochemical and chemical properties of the particles, in
the chemical processes ... in any form or by any means, electronic or
mechanical, including photocopying, microfilming, and recording, or by any information storage or retrieval
system, without prior permission in writing ... ENVIRONMENT
Aerosol
CHEMICAL
PROCESSES
IN THE
â 2000 by CRC Press LLC
20 Aerosol Chemical Processes in the Environment
53. Rood, M.J., Ambient aerosols and their in uence on climate, Newsletters of the Chinese...
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AEROSOL CHEMICAL PROCESSES IN THE ENVIRONMENT - CHAPTER 2 docx
Ngày tải lên :
18/06/2014, 19:20
... LLC
30 Aerosol Chemical Processes in the Environment
The saddle point on the free energy surface can be found by setting
(2.19)
Applying these conditions to Equation 2.17 and making use of the ... molecules are then used to determine
the binary nucleus by creating a saddle surface in three-dimensional (∆G – n
1
– n
2
) space and
searching the saddle point.
The principal difference between the ... of CaO in fly ash with H
2
SO
4
in the air. CaSO
4
has been found in
fogwater collected in Po Valley, Italy.
88
Other possibilities exist, including many slightly soluble organics. In
curve...
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AEROSOL CHEMICAL PROCESSES IN THE ENVIRONMENT - CHAPTER 3 pot
Ngày tải lên :
18/06/2014, 19:20
...
Aerosol Chemical Processes in the Environment
value results in substantial in uence on the rate of change of drop size. Temperature relaxation has
been investigated
4,5
; the in uence of inhomogeneous ... (characteristic) time intervals in the problem. The first one (
t
1
) is the time
interval during which the steady-state field of the vapor is established in the vicinity of the drop.
The time interval ... some minutes.
In the opposite case, when τ << 1/6, it is possible to derive an approximate formula for the salt
concentration, introducing Equation 3.14 into Equation 3.25, after integration,...
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AEROSOL CHEMICAL PROCESSES IN THE ENVIRONMENT - CHAPTER 4 pdf
Ngày tải lên :
18/06/2014, 19:20
... the uncertainties in σ determination by the
single-particle levitation experiment lie largely in estimating the product (V
d
t
i
K). Taking a typical
droplet of 15 àm in diameter, an induction ... 73
(4.15)
Upon substituting n from Equation 4.15 into Equation 4.14, rearranging and integrating the resulting
equation from a reference temperature, T*, one obtains
(4.16)
Since for the most electrolyte ... by continuously and
simultaneously monitoring the changes in weight and in Mie scattering patterns of a single sus-
pended solution droplet undergoing controlled growth or evaporation in a humidified...
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AEROSOL CHEMICAL PROCESSES IN THE ENVIRONMENT - CHAPTER 5 pot
Ngày tải lên :
18/06/2014, 19:20
... The
albedos of clouds containing ice particles are higher than of similar clouds containing water droplets
only. The increasing concentration of sulfate in the atmosphere will increase the albedos ... expand the belt of clouds containing ice north in the southern and south in the northern
hemisphere. This in turn will increase daytime global cooling.
8
FORMATION OF ICE IN CLOUDS
Phase transitions, ... condensing nor evaporating. For a water drop in equi-
librium with temperature, the number of condensing and evaporating water molecules are equal to
each other in any time interval. During the...
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AEROSOL CHEMICAL PROCESSES IN THE ENVIRONMENT - CHAPTER 6 docx
Ngày tải lên :
18/06/2014, 19:20
... multiple size bins is solved by iterating each equilibrium equation,
including gas-solution equations, starting with the first size bin. Updated gas concentrations from
the first bin affect the ... reaction (J
mole
–1
) at temperature T
o
= 298.15K. Combining Equations 6.42 and 6.43 and writing the result in
integral form gives
(6.44)
Integrating this equation yields the temperature-dependent ... size bins and the gas phase is solved in a similar manner.
Suppose a system consists of several size bins, equations per bin, and gases that equilibrate with
dissolved molecules in each bin. Each...
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AEROSOL CHEMICAL PROCESSES IN THE ENVIRONMENT - CHAPTER 7 pptx
Ngày tải lên :
18/06/2014, 19:20
... determination of chromium valency
in aerosols of industrial origin:
ã Chemical spectrophotometric analysis techniques, also called wet chemical techniques
ã Physical and chemical techniques using ... Study of Oxidation States of Chromium in Aerosols
161
Dust sampling was performed at a site rich in fumes containing large amounts of chromium
using two kinds of impactors:
ã A normal Andersen ... Farmer, V.C., The Infrared Spectra of Minerals, Mineralogical Society, London, 1974, 539.
28. Griffith, W.P., Advances in the Raman and infrared spectroscopy of minerals, Spectroscopy of Inor-
ganic-based...
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AEROSOL CHEMICAL PROCESSES IN THE ENVIRONMENT - CHAPTER 8 pdf
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18/06/2014, 19:20
... 192 Aerosol Chemical Processes in the Environment
the index of refraction. As this imaginary part increases, both the angular scattering intensity
distribution and the size scattering intensity, ... nonlinear least-squares method outlined by Marquardt.
52
In Figure 8.9, a plot of the
scattering intensity ratio against the molar mixing ratio of Na
2
SO
4
to (NH
4
)
2
SO
4
is shown. The
linearity ... are several aspects in considering the use of spontaneous Raman scattering as a quantitative
measuring technique for aerosol particles. In principle, the Raman scattering intensity, I
s
is propor-
tional...
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AEROSOL CHEMICAL PROCESSES IN THE ENVIRONMENT - CHAPTER 9 pdf
Ngày tải lên :
18/06/2014, 19:20
... were generated using a dry process
referred to as contact charging. Contact charging involved bringing a potential field in the vicinity
of the conductive powder that was placed in contact with ... analyses such as that of Robbins and Cadle.
In this study, single phosphoric acid droplets, varying in diameter from 42 to 72 µm, were
levitated in the cell at varying ammonia gas partial pressures ... uniform spreading of
the monolayer over the water surface. It was our intent to: (1) determine if the "kinks" are present
in the single droplet evaporation data, and (2) determine the value...
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AEROSOL CHEMICAL PROCESSES IN THE ENVIRONMENT - CHAPTER 10 docx
Ngày tải lên :
18/06/2014, 19:20
... between about 2 nm and 6 nm. At temperatures above the melting point (sintered
silver was maintained in a porcelain boat), the particle sizes increased rapidly up to over 0.1 àm
(Figure 10.12). This ... possibility of chemically identifying individual particles in the aerosol sample.
An aerosol can be activated directly in a suspended state, independent of its chemical compo-
sition, in a stream ... Labeled Fibrous Mineral Aerosols 228
Radioactive Labeling of Sampling Filters 231
Radioactive Aerosol Labeling in Animal Inhalation Toxicology and Medical Research 234
Animal Inhalation Toxicology...
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AEROSOL CHEMICAL PROCESSES IN THE ENVIRONMENT - CHAPTER 11 docx
Ngày tải lên :
18/06/2014, 19:20
... applications. The elaboration process is based on
atomizing a solution containing the precursors. A good conditioning of the aerosol is necessary to
improve our strategy of reducing the defects that can ... LLC
252
Aerosol Chemical Processes in the Environment
for
in situ
EXAFS analysis of aerosols is placed after the first ionization chamber of the X-ray
beam line.
In situ
absorption ... effect on densifying and sintering. Another
important problem related to the particle shape is illustrated by the fact that strongly agglomerated
powders give difficulties in sintering conventional...
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