Korean Chemical Engineering Research, Vol.48, No.4, 423-427, August, 2010
나노구조를 갖는 중공구형 및 중공반구형 다공성 탄소 담체가 페놀 수산화 반응에 미치는 영향 및 용매 의존도
Support Effect of Nano Structured Carbon Nano Sphere and Nano Bowl of Carbon in the Phenol Hydroxylation and its Solvent Dependence
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초록
나노구조를 갖는 중공구형(CNS) 및 중공반구형(NBC) 다공성 탄소 담체에 각각 약 1.0 wt%의 구리를 담지시켜 두종류의 촉매를 제조하였고 과산화수소수에 의한 페놀의 수산화 반응에서 촉매의 성능을 두 종류의 서로 다른 용매(물, 아세토니트릴)에 대하여 비교 분석하였다. 촉매에 담지된 구리의 양은 EDS 분석으로 확인하였고 비표면적, 기공 부피, 기공 분포도 등을 비교 분석하였다. 두 종류의 촉매에서 모두 아세토니트릴보다 물에서 더 높은 전환율과 과산화수소 유효도 및 카테콜과 하이드로퀴논의 생성율을 얻을 수 있었고, 물을 용매로 사용했을 때 1.0 Cu/CNS 촉매가 1.0 Cu/NBC 촉매보다 50% 이상의 전환율과 과산화수소 유효도를 보였다.
Carbon nano sphere(CNS) and nano bowl of carbon(NBC) containing 1.0 wt% copper were prepared by impregnation method and their catalytic activity was compared in the phenol hydroxylation with hydrogen peroxide in the presence of water and acetonitrile as a solvent, respectively. Cu content of catalysts was determined by EDS, and BET, pore volume, pore size and pore size distribution were compared. For both catalysts, phenol conversion, H2O2 efficiency
and yield of catechol and hydroquinone were higher in the presence of water as a solvent than those in the presence of actonitrile. And catalytic activity such as phenol conversion and H2O2 efficiency of 1.0 Cu/CNS is about two times higher than that of 1.0 Cu/NBC in water solvent.
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