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

방독마스크용 코발트 촉매의 저온 일산화탄소 산화반응에서 지지체의 영향

  • Published : 2006.04.30

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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