본 연구에서는 $gamma-Al_2O_3$에 전이금속들을 함침시킨 촉매를 고정층 반응기에 충전시킨후 휘발성유기물질(VOCs)인 밴젠을 일정농도로 공급하면서 촉매산화 특성을 살펴보았다. 전이금속으로는 구리, 니켈, 망간, 철등을 포함해 8가지 금속을 선정하였고, 실험조건은 반응온도 $200sim500^{circ}C$, 벤젠의 농도 $1,000sim3,000$ ppm, 공간속도 $5,000sim60,000;hr^{-1}$의 범위로 적용하였다. BET분석, 전자주사현미경(SEM), XRD분석을 통해 제조된 촉매의 물성을 조사하였으며, VOC 촉매산화반응의 전환율에 대하여 고찰하였다. 실험결과, VOC농도와 공간속도가 낮을수록 VOC산화반응의 전환율은 증가함을 알 수 있었다. 여러 전이금속촉매들 중에 Cu촉매가 벤젠에 대해 가장 높은 활성을 나타내었고, 소성온도 $500^{circ}C$조건에서 전이금속의 함침율이 15 wt%일 경우 가장 높은 전환율을 나타내었다.
Catalytic oxidation characteristics of benzene as a VOC was investigated using a fixed bed reactor system over transition $metals/gamma-Al_2O_3$ catalysts. As transition metals, eight metals including copper, nickel, manganese, iron etc. were adopted. The parametric tests were conducted at the reaction temperature range of $200sim500^{circ}C$, benzene concentration of $1,000sim3,000$ ppm, and space velocity range of $5,000sim60,000;hr^{-l}$. The property analyses such as BET, SEM, XRD and the conversions of catalytic oxidation of VOC were examined. The experimental results showed that the conversion was increased with decreasing VOC concentration and space velocity. It was also found that $Cu/gamma-Al_2O_3$ catalyst calcinated at $500^{circ}C$ showed the highest activity for the oxidation of benzene and 15% metal loading was the optimum impregnation level.
