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The Influence of Support on Gas Mask Cobalt Catalysts for Low Temperature CO Oxidation  

Kim, Deog-Ki (Department of Safety Engineering, Chungbuk National University)
Kim, Bok-Ie (Department of Chemical Engineering, Chungbuk National University)
Shin, Chae-Ho (Department of Chemical Engineering, Chungbuk National University)
Shin, Chang-Sub (Department of Safety Engineering, Chungbuk National University)
Publication Information
Journal of the Korean Society of Safety / v.21, no.2, 2006 , pp. 35-45 More about this Journal
Abstract
Cobalt catalysts for gas mask loaded on various supports such as $Al_{2}O_{3},\;TiO_{2}$, AC(activated carbon) and $SiO_{2}$ were used to examine influences of calcination temperatures and reaction temperatures for CO oxidation. $Co(NO_{3})_2{\cdot}6H_{2}O$ was used as cobalt precursor and the catalysts were prepared by incipient wetness impregnation. The catalysts were characterized using XRD, TGA/DTA, TEM, $N_{2}$ sorption, and XPS. For the catalytic activity, support was in the order of ${\gamma}-Al_{2}O_{3}>TiO_{2}>SiO_{2}>AC\;and\;Al_{2}O_{3}$. The catalytic activity at lower temperature than $80^{\circ}C$ showed that with the increase of reaction temperature, cobalt catalysts on ${\gamma}-Al_{2}O_{3},\;TiO_{2},\;AC\$ has the negative activation energy but that of $SiO_{2}$ was positive.
Keywords
CO oxidation; gas mask; $Co/{\gamma}-Al_{2}O_{3}$; $Co/TiO_{2}$; Co/AC; $Co/SiO_{2}$; cobalt catalyst; calcination temperature;
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