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Thermo gravimetric study of calcination of dolomite at pressurised conditions

Martensson, R and Bjerle, Ingemar LU (1996) In Chemical Engineering & Technology 19(4). p.364-372
Abstract
Calcination and carbonation behaviour of dolomite has been studied in a pressurised thermo balance at pressures in the range of 1.1 to 2.3 MPa and for temperatures ranging from 730 to 840 degrees C. The atmosphere consisted of nitrogen containing up to 20 vol.-% carbon dioxide. The calcination of dolomite has been studied as a function of temperature, particle size, and P-CO2. An investigation concerning possible mass transfer restrictions for the experimental system and a model investigation of the calcination rate in CO2 atmosphere has been made. Further, the effect of calcination on the BET surface and the BET surface including the surface structure due to successive temperature cycles has been studied. The temperature for the... (More)
Calcination and carbonation behaviour of dolomite has been studied in a pressurised thermo balance at pressures in the range of 1.1 to 2.3 MPa and for temperatures ranging from 730 to 840 degrees C. The atmosphere consisted of nitrogen containing up to 20 vol.-% carbon dioxide. The calcination of dolomite has been studied as a function of temperature, particle size, and P-CO2. An investigation concerning possible mass transfer restrictions for the experimental system and a model investigation of the calcination rate in CO2 atmosphere has been made. Further, the effect of calcination on the BET surface and the BET surface including the surface structure due to successive temperature cycles has been studied. The temperature for the initialisation of calcination of dolomite in CO2 atmosphere was independent of both P-CO2 and the particle size. No conclusive indications on mass transfer restrictions have been detected for the experimental system. A significant difference in calcination rate as a function of particle size existed for decomposition in CO2 atmosphere. A model for homogeneously progressing chemical reaction parallel with a shrinking core chemical reaction together with a mass transfer control mechanism was found to describe the calcination rate in CO2 atmosphere most accurately. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Chemical Engineering & Technology
volume
19
issue
4
pages
364 - 372
publisher
John Wiley & Sons
external identifiers
  • wos:A1996VE53900009
  • scopus:0030205313
ISSN
1521-4125
DOI
10.1002/ceat.270190410
language
English
LU publication?
yes
id
60a9f440-b29a-4a7b-89c2-adafc4d5277c (old id 3916692)
date added to LUP
2013-07-03 08:06:57
date last changed
2017-01-01 04:37:04
@article{60a9f440-b29a-4a7b-89c2-adafc4d5277c,
  abstract     = {Calcination and carbonation behaviour of dolomite has been studied in a pressurised thermo balance at pressures in the range of 1.1 to 2.3 MPa and for temperatures ranging from 730 to 840 degrees C. The atmosphere consisted of nitrogen containing up to 20 vol.-% carbon dioxide. The calcination of dolomite has been studied as a function of temperature, particle size, and P-CO2. An investigation concerning possible mass transfer restrictions for the experimental system and a model investigation of the calcination rate in CO2 atmosphere has been made. Further, the effect of calcination on the BET surface and the BET surface including the surface structure due to successive temperature cycles has been studied. The temperature for the initialisation of calcination of dolomite in CO2 atmosphere was independent of both P-CO2 and the particle size. No conclusive indications on mass transfer restrictions have been detected for the experimental system. A significant difference in calcination rate as a function of particle size existed for decomposition in CO2 atmosphere. A model for homogeneously progressing chemical reaction parallel with a shrinking core chemical reaction together with a mass transfer control mechanism was found to describe the calcination rate in CO2 atmosphere most accurately.},
  author       = {Martensson, R and Bjerle, Ingemar},
  issn         = {1521-4125},
  language     = {eng},
  number       = {4},
  pages        = {364--372},
  publisher    = {John Wiley & Sons},
  series       = {Chemical Engineering & Technology},
  title        = {Thermo gravimetric study of calcination of dolomite at pressurised conditions},
  url          = {http://dx.doi.org/10.1002/ceat.270190410},
  volume       = {19},
  year         = {1996},
}