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Modeling of high-temperature desulfurization by Ca-based sorbents

Wang, Wuyin LU and Bjerle, Ingemar LU (1998) In Chemical Engineering Science 53(11). p.1973-1989
Abstract
Models for estimating the sulfation of CaO at high temperature are presented. Short-residence-time sulfation is described by a pore size distribution model and long-residence-time sulfation by a particle expansion model. The calculations made agree well with experiments carried out on three different limestones in a TGA, a volumetric reactor and an entrained flow reactor. The pore size distribution model explains the effects of particle size, pore size distribution and partial pressure of SO2, suggesting these three factors to be the most important for CaO conversion. For particles larger than 1-2 mu m, pore diameters of 50-300 Angstrom are desirable. When large particles or long-residence times are used, as in fluidized-bed combustion,... (More)
Models for estimating the sulfation of CaO at high temperature are presented. Short-residence-time sulfation is described by a pore size distribution model and long-residence-time sulfation by a particle expansion model. The calculations made agree well with experiments carried out on three different limestones in a TGA, a volumetric reactor and an entrained flow reactor. The pore size distribution model explains the effects of particle size, pore size distribution and partial pressure of SO2, suggesting these three factors to be the most important for CaO conversion. For particles larger than 1-2 mu m, pore diameters of 50-300 Angstrom are desirable. When large particles or long-residence times are used, as in fluidized-bed combustion, the particle expansion model shows the particle size and the sorbent type to be the main factors affecting the reaction. (C) 1998 Elsevier Science Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
particle size, high temperature desulfurization, Ca-based sorbent, pore, size, pore model
in
Chemical Engineering Science
volume
53
issue
11
pages
1973 - 1989
publisher
Elsevier
external identifiers
  • wos:000074837500003
  • scopus:0032511141
ISSN
0009-2509
DOI
10.1016/S0009-2509(98)00046-3
language
English
LU publication?
yes
id
b74e487c-6172-48bf-ab6c-4746abb4d7c8 (old id 3916682)
date added to LUP
2013-07-03 08:22:54
date last changed
2017-04-02 04:03:39
@article{b74e487c-6172-48bf-ab6c-4746abb4d7c8,
  abstract     = {Models for estimating the sulfation of CaO at high temperature are presented. Short-residence-time sulfation is described by a pore size distribution model and long-residence-time sulfation by a particle expansion model. The calculations made agree well with experiments carried out on three different limestones in a TGA, a volumetric reactor and an entrained flow reactor. The pore size distribution model explains the effects of particle size, pore size distribution and partial pressure of SO2, suggesting these three factors to be the most important for CaO conversion. For particles larger than 1-2 mu m, pore diameters of 50-300 Angstrom are desirable. When large particles or long-residence times are used, as in fluidized-bed combustion, the particle expansion model shows the particle size and the sorbent type to be the main factors affecting the reaction. (C) 1998 Elsevier Science Ltd. All rights reserved.},
  author       = {Wang, Wuyin and Bjerle, Ingemar},
  issn         = {0009-2509},
  keyword      = {particle size,high temperature desulfurization,Ca-based sorbent,pore,size,pore model},
  language     = {eng},
  number       = {11},
  pages        = {1973--1989},
  publisher    = {Elsevier},
  series       = {Chemical Engineering Science},
  title        = {Modeling of high-temperature desulfurization by Ca-based sorbents},
  url          = {http://dx.doi.org/10.1016/S0009-2509(98)00046-3},
  volume       = {53},
  year         = {1998},
}