Applied Chemistry for Engineering, Vol.25, No.3, 312-317, June, 2014
침전법으로 제조된 CuO-CeO2 혼합산화물에서 벤젠의 촉매연소반응
Catalytic Combustion of Benzene over CuO-CeO2 Mixed Oxides Prepared by Co-precipitation Method
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초록
공침전법으로 제조된 CuO-CeO2 혼합산화물 촉매에서 벤젠의 촉매연소 반응에 대해 연구하였다. CuO-CeO2 혼합산화물 촉매들은 침전제 및 CuO 전구체를 달리하여 제조하였고, XRD, BET, XPS 및 H2-TPR에 의해 특성분석을 하였다. 침전제의 종류에 상관없이 CuO 피크가 2θ = 35.5°와 38.5°에서 뚜렷하게 나타났다. NH4OH를 침전제로 사용하여 제조한 Cu/(Cu+Ce)의 몰비율이 0.35인 촉매가 가장 높은 활성을 보여주었다. 또한, 수소로 전처리하면 벤젠 연소반응의 활성이 증가하였고, 400 ℃에서 수소로 전처리한 촉매가 가장 높은 활성을 보여주었다.
Catalytic combustion of benzene over CuO-CeO2 mixed oxides prepared by co-precipitation method were investigated. The CuO-CeO2 mixed oxides were also prepared using different precipitant and CuO precursor. They were characterized by XRD, BET, XPS and H2-TPR. In the CuO-CeO2 catalysts, characteristic copper oxide peaks were shown at 2θ = 35.5° and 38.5°
regardless of the precipitant. The Cu0.35 catalyst prepared using NH4OH as a precipitant revealed the highest activity on the combustion of benzene. In addition, the pretreatment with hydrogen enhanced the catalytic activity and the catalyst reduced at 400 ℃ showed the highest activity on the combustion of benzene.
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