Effect of the product layer on the kinetics of the CO2‐lime reaction
作者:
S. K. Bhatia,
D. D. Perlmutter,
期刊:
AIChE Journal
(WILEY Available online 1983)
卷期:
Volume 29,
issue 1
页码: 79-86
ISSN:0001-1541
年代: 1983
DOI:10.1002/aic.690290111
出版商: American Institute of Chemical Engineers
数据来源: WILEY
摘要:
AbstractThe kinetics of reaction between CO2and lime is investigated in the range of 673 to 998 K with a view to examining the effects of product layer deposition and variations in the limestone calcination atmosphere. The reaction is initially rapid and chemically controlled and goes through a sudden transition to a much slower regime controlled by diffusion in the product CaCO3layer. The magnitude of the estimated product layer diffusivity is in the range of 10−18to 10−21m2/s, the corresponding activation energy is 88.9 ± 3.7 kJ/mol below 688 K and 179.2 ± 7.0 kJ/mol above that temperature, suggestive of solid state diffusion. Plausible mechanisms are disc
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