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Studies on Reaction Kinetics of LiOH for Absorbing CO2

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3 Author(s)
Zhao Zhuo ; Dept. of Environ. Sci., Beijing Union Univ., Beijing ; Fu Pingfeng ; Zhao Boyuan

A static method was employed to study the reaction kinetics of anhydrous lithium hydroxide (LiOH) and CO2. At the reaction temperature of 15~60degC and initial CO2 pressures of 25~100 kPa, the reaction rate of anhydrous LiOH and CO2 decreased slightly with the reduction of initial CO2 pressure and the rise of reaction temperature, indicating that the reaction activation energy of LiOH and CO2 was negative and close to zero. During the middle period (1~5 min) of the isothermal reaction, the ratio of reaction efficiency was approximately the power of 0.4 to that of initial CO2 pressures. As anhydrous LiOH reacted to CO2, the solid product Li2CO3 covered on the surface of LiOH was not compact, so it didn't hinder the subsequent reaction of absorbing the CO2 gas. The reaction kinetics of anhydrous LiOH and CO2 obeyed the Erofeev's model.

Published in:

Power and Energy Engineering Conference, 2009. APPEEC 2009. Asia-Pacific

Date of Conference:

27-31 March 2009

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