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Water‐induced rearrangement of Ca(OH) 2 (0001) surfaces reacted with SO 2
Author(s) -
Bausach M.,
PeraTitus M.,
Fite C.,
Cunill F.,
Izquierdo J.F.,
Tejero J.,
Iborra M.
Publication year - 2006
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.10907
Subject(s) - water vapor , chemistry , flue gas desulfurization , flue gas , lime , reaction mechanism , chemical engineering , inorganic chemistry , organic chemistry , materials science , catalysis , metallurgy , engineering
AFM imaging and EDS microanalyses provide evidence of the reorganization of single‐crystal Ca(OH) 2 (0001) surfaces attacked by SO 2 at low temperature when exposed to water vapor in such a way that larger product features are formed from the aggregation of smaller ones. This product rearrangement induced by water vapor might provide a new accessible Ca(OH) 2 surface for further reaction with SO 2 , which might account for the general observation reported in the literature that water vapor exerts a substantial influence on the ability of commercial hydrated lime to retain SO 2 in flue gas desulfurization (FGD) technologies. A reaction mechanism consistent with the experimental observations and with its kinetic implications is discussed. © 2006 American Institute of Chemical Engineers AIChE J, 2006