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Effects of Alkaline Additives on CO2 Removal by Li2ZrO3  

Park, Joo-Won (Department of Chemical Eng., Kwangwoon University)
Kang, Dong-Hwan (Department of Chemical Eng., Kwangwoon University)
Jo, Young-Do (Department of Chemical Eng., Kwangwoon University)
Yoo, Kyung-Seun (Department of Environmental Eng., Kwangwoon University)
Lee, Jae-Goo (Thermal Process Research Center, Korea Institute of Energy Research)
Kim, Jae-Ho (Thermal Process Research Center, Korea Institute of Energy Research)
Han, Choon (Department of Chemical Eng., Kwangwoon University)
Publication Information
Korean Chemical Engineering Research / v.44, no.5, 2006 , pp. 535-539 More about this Journal
Abstract
Effects of alkaline additives on the $CO_2$ removal reaction have been investigated by a thermogravimetric analyzer. $Li_2ZrO_3$ was synthesized by soild reaction of $ZrO_2$ with $Li_2CO_3$ and then alkali chemicals were added to the synthesized $Li_2ZrO_3$ and then heat treatment was carried out. Addition of alkali chemicals enhanced the reactivity of $Li_2ZrO_3$ with the following order; $K_2CO_3>NaCl>LiCl>Na_2CO_3$, which were resulted from the formation of partially melted $Li_2CO_3$. SEM photographs showed the presence of melted state and the XRD results showed that the chemical states of added salts were not changed. Addition of NaCl caused the induction time of about 60 min at the initial reaction stage and the addition of $Na_2CO_3$ inhibited the decomposition of $Li_2CO_3$ at about $700{\sim}750^{\circ}C$.
Keywords
$Li_2ZrO_3$; Alkali Salts; Partially Melting; $CO_2$ Removal; Diffusion;
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