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Effect of Li 2 CO 3 on Reaction Between CaO and CO 2
Author(s) -
BERUTO DARIO,
KIM M. G.,
BARCO LUIGI
Publication year - 1984
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1984.tb18846.x
Subject(s) - eutectic system , reaction rate , analytical chemistry (journal) , materials science , diffusion , chemistry , mineralogy , inorganic chemistry , metallurgy , thermodynamics , catalysis , microstructure , biochemistry , physics , chromatography
Reaction between CaO powders and CO 2 ( g ) is often limited by slow diffusion of CO 2 through the CaCO 3 product. Additions of Li 2 CO 3 are shown to increase the reaction rate. At temperatures around 940 K, near to the Li 2 CO 3 ‐CaCO 3 eutectic temperature, 935 K, complete reaction of the CaO with CO 2 can be achieved when the heating rate and Li 2 CO 3 content are optimized. At lower temperatures Li 2 CO 3 causes lesser but measurable increases in reaction rates. SEM and surface area observations suggest different reaction paths when Li 2 CO 3 is present, when Li 2 CO 3 and eutectic are present, and when eutectic alone is present.