Calcination kinetics of limestone and the microstructure of nascent CaO
(1993) In Thermochimica Acta 223. p.109-120- Abstract
- The calcination kinetics of limestone was investigated by TGA at 600-1000-degrees-C and from 1 mbar to 1 atm. The temperature, total pressure, CO2 partial pressure and particle size affect the calcination rate. Above 90% of calcination efficiency can be reached in less than 2.5 s at 1000-degrees-C and 1 mbar. Under the conditions of eliminating all diffusion resistances, the instantaneous rate of calcination is proportional to the surface area of undecomposed CaCO3, and this process can be described by a shinking core model. The microstructure of nascent CaO that was prepared in an entrained-flow reactor at 1 atm, was studied using the BET method. The BET surface area of the calcines increases with increasing residence time and temperature... (More)
- The calcination kinetics of limestone was investigated by TGA at 600-1000-degrees-C and from 1 mbar to 1 atm. The temperature, total pressure, CO2 partial pressure and particle size affect the calcination rate. Above 90% of calcination efficiency can be reached in less than 2.5 s at 1000-degrees-C and 1 mbar. Under the conditions of eliminating all diffusion resistances, the instantaneous rate of calcination is proportional to the surface area of undecomposed CaCO3, and this process can be described by a shinking core model. The microstructure of nascent CaO that was prepared in an entrained-flow reactor at 1 atm, was studied using the BET method. The BET surface area of the calcines increases with increasing residence time and temperature in less than 2 s and below 1000-degrees-C. The largest BET surface area and cumulative pore volume of 2 s nascent CaO are obtained at 1000-degrees-C and 700-degrees-C, respectively. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3916736
- author
- Zhong, Q and Bjerle, Ingemar LU
- organization
- publishing date
- 1993
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Thermochimica Acta
- volume
- 223
- pages
- 109 - 120
- publisher
- Elsevier
- external identifiers
-
- wos:A1993LX75900013
- scopus:24044503329
- ISSN
- 0040-6031
- DOI
- 10.1016/0040-6031(93)80125-T
- language
- English
- LU publication?
- yes
- id
- 266d9f49-7b3b-4e21-be05-f77de5d8adb0 (old id 3916736)
- date added to LUP
- 2016-04-01 15:46:51
- date last changed
- 2023-09-04 06:27:52
@article{266d9f49-7b3b-4e21-be05-f77de5d8adb0,
abstract = {{The calcination kinetics of limestone was investigated by TGA at 600-1000-degrees-C and from 1 mbar to 1 atm. The temperature, total pressure, CO2 partial pressure and particle size affect the calcination rate. Above 90% of calcination efficiency can be reached in less than 2.5 s at 1000-degrees-C and 1 mbar. Under the conditions of eliminating all diffusion resistances, the instantaneous rate of calcination is proportional to the surface area of undecomposed CaCO3, and this process can be described by a shinking core model. The microstructure of nascent CaO that was prepared in an entrained-flow reactor at 1 atm, was studied using the BET method. The BET surface area of the calcines increases with increasing residence time and temperature in less than 2 s and below 1000-degrees-C. The largest BET surface area and cumulative pore volume of 2 s nascent CaO are obtained at 1000-degrees-C and 700-degrees-C, respectively.}},
author = {{Zhong, Q and Bjerle, Ingemar}},
issn = {{0040-6031}},
language = {{eng}},
pages = {{109--120}},
publisher = {{Elsevier}},
series = {{Thermochimica Acta}},
title = {{Calcination kinetics of limestone and the microstructure of nascent CaO}},
url = {{http://dx.doi.org/10.1016/0040-6031(93)80125-T}},
doi = {{10.1016/0040-6031(93)80125-T}},
volume = {{223}},
year = {{1993}},
}