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Investigation into Reaction Kinetics of LiOH*H2O and CO2

Reaction kinetics of LiOHldrH
 2
O and CO
 2
 within a closed system were investigated under the adsorption of water vapor. At the reaction temperature of 273~323 K and initial CO
 2
 pressures of 40~100 kPa, reaction kinetics obeyed the Erofeev model. The reaction rate decreased slightly while the initial CO
 2
 pressure reduced. When the reaction occurred at 273~299 K, the reaction rate was so low that it was almost independent of the reaction temperature. However, as the temperature rose up to 300~323 K, LiOHldrH
 2
O dehydrated its crystal water, and both the dehydrated and reaction-generated water were evaporated from solid reactant. For the dehydration rate increased, the reaction rate also increased as the reaction temperature rose. While the temperature was higher than 323 K, the reaction apparent activation energy of LiOHldrH
 2
O and CO
 2
, was higher than 52.5 kJ/mol and close to 61.4 kJ/mol of the LiOHldrH
 2
O dehydrated enthalpy variable at 298 K, in which anhydrous LiOH was the major reactant and showed the reaction characteristics of LiOH crystals.