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Korean Chemical Engineering Research,
Vol.42, No.1, 38-43, 2004
Vol.42, No.1, 38-43, 2004
C1-HVOCs 제거를 위한 Ru-Sn/γ-Al2O3 촉매 제조 및 반응성 평가
Preparation of Ru-Sn/γ-Al2O3 Catalyst and Evaluation of its Reactivity for the Removal of C1-HVOCs
HVOCs 제거에 사용되는 백금-팔라듐계보다 저렴한 촉매 개발을 목적으로 다양한 루테늄계 촉매를 제조하여 C1-HVOCs분해 특성 평가 실험을 수행하였다. 그 결과 Ru[2]-Sn[2]/γ-Al2O3 촉매가 가장 우수한 성능을 보였다. 구조 증진제인 주석은 흡착 산소의 양을 증가시키고, 다양한 산소 이온 종의 생성에 기여함을 알 수 있었다. HVOCs분해 반응에 첨가되는 산소 원자는 주로 루테늄과 주석에 흡착되며, CH3Cl등 HVOCs는 지지체인 γ-Al2O3의 브뢴스테드 및 루이스 산점에 흡착됨을 알 수 있었다. 흡착된 HVOCs의 염소와 브뢴스테드 산점의 수소의 화학 결합에 의한 HCl의 생성 반응이 HVOCs 분해의 주 반응 기구임을 알 수 있었다.
Various ruthenium(Ru) based catalysts, which were less expensive than Pt-Pd based catalysts, were prepared and their activity with C1-HVOCs (Halogenated Volatile Organic Compounds) was evaluated. Ru[2]-Sn[2]/γ-Al2O3 was found to have the most desirable effect on the destruction of HVOCs. Tin taken as a structural promoter was found to increase the amount of oxygen adsorption and to generate various oxygen ions. Oxygen atoms were found to be mainly adsorbed on the surface of ruthenium and tin and HVOCs such as CH3Cl to be adsorbed on Bronsted and Lewis acid sites of γ-Al2O3 supports. It was found that the formation of HCl by the reaction of chlorine in HVOCs with hydrogen atom on Bronsted acid site was the main reaction mechanism in the destruction of HVOCs.
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