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Received July 4, 2006
Accepted July 18, 2006
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Pd-Cu/USY 제올라이트상에서 톨루엔 연소반응 연구
The Study of Toluene Combustion over Palladium-copper/USY Zeolite Catalyst
Hye Young Lee
Taihuan Jin
Young Kyu Hwang
Jong-San Chang
Jin-Soo Hwang†
Chang-Gook Lee1
Shin Baek1
Do-Young Ra1
한국화학연구원 그린화학촉매연구센터, 305-600 대전시 유성구 장동 100 1KT&G중앙연구원 담배과학연구소, 305-345 대전시 유성구 신성동 302
Catalyist Center for Green Chemistry, Korea Research Institute of Chemical Technology, 100, Jang-dong, Yusung-gu, Daejeon 305-600, Korea 1Tobacco Research Group, KT&G Central Research Institute, 302, Shinseong-dong, Yusung-gu, Daejeon 305-805, Korea
jshwang@krict.re.kr
Korean Chemical Engineering Research, August 2006, 44(4), 404-409(6), NONE Epub 6 September 2006
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Abstract
USY 제올라이트에 이원계의 Pd-Cu 복합촉매를 담지하여 FT-IR 분석기로 밀폐계에서 촉매의 표면반응특성을 조사하였다. 700 ppm의 톨루엔 연소반응은 고정반응기를 이용하여 80~220 °C에서 수행하였으며 톨루엔을 GC로 분석하였다. 촉매활성은 Pd-Cu/USY > Pd/USY > PdO-CuO/USY > PdO/USY > PdO/Al2O3의 순서임을 알 수 있었다. 저온연소반응에서 수분이 촉매의 활성에 미치는 영향을 관찰하였고 공기의 공급변화를 통하여 촉매표면에 있는 결정격자의 산소가 반응에 참여 여부를 조사하였다. 환원된 촉매들은 톨루엔의 연소활성에너지로 인해 산화된 촉매에 비해 활성이 높았다.
The catalytic combustion of toluene over Pd-Cu/USY zeolite has been examined by using FT-IR spectroscopy in a closed system under dry and humid conditions. The catalytic combustion of toluene (700 ppmv) in the temperature range of 80.220 °C has been investigated by using a fixed bed reactor. The Pd-Cu/USY catalyst showed the highest catalytic performance with respects to the PdO-CuO/USY and Pd/USY. Comparing to PdO/Al2O3 catalysts, the slight improvement in conversion was observed over PdO/USY catalysts under humid condition since USY zeolite is hydrophobic substrate and water give an additional oxygen source to zeolite surface like oxygen. The reduced catalysts showed more enhanced catalytic activity due to the reduced activation energy of combustion of toluene than oxidized catalysts such as PdO/USY and PdO-CuO/USY.
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