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Issue
Korean Chemical Engineering Research,
Vol.50, No.4, 723-728, 2012
MoO3-SnO2-CeO2 촉매에 의한 대두유로부터 바이오디젤의 합성
Synthesis of Biodiesel from Soybean Oil over MoO3-SnO2-CeO2 Catalysts
정원영, 이만식, 홍성수
MoO3, SnO2 및 CeO2 혼합촉매를 사용하여 대두유의 전이에스터화 반응에 의해 바이오디젤을 제조하였다. 제조된 촉매는 XRD 및 NH3-TPD 등으로 특성을 분석하였다. 세 가지 금속 산화물 중 MoO3가 가장 높은 활성을 보여주었으며, 반응에 사용된 촉매의 양이 7%일 때 바이오디젤로의 전환율이 가장 높았다. 또한, 반응물에 첨가된 물은 바이오디젤로의 전환율이 감소되었다. MoO3와 SnO2가 혼합된 촉매에서는 SnO2와 MoO3의 혼합비율이 5:5일 때 가장 높은 활성을 나타내었으며, CeO2가 첨가된 촉매의 경우 첨가된 CeO2의 첨가량이 20% 일 때 가장 높은 활성을 나타내었다. 또한 이들의 활성은 촉매들의 산점의 양과 상관관계를 보여주었다. 폐대두유를 이용한 반응에서는 약 30% 이상 바이오디젤로의 전환율이 감소하였다.
The production of biodiesel by transesterification of soybean oil was performed on MoO3, SnO2 and CeO2 mixed oxides. The catalysts were characterized using XRD and NH3-TPD. MoO3 showed the highest activity among the three metal oxides. When 7 wt% of catalysts was introduced into the reactants, the highest activity was obtained and the water added to reactant decreased the catalytic activity. MoO3 and SnO2 mixed with 50:50 showed the highest activity and CeO2 added with 20% on the MoO3-SnO2 mixed oxide also showed the highest activity. The catalytic activity showed to have a good relationship with the amount of acid site of catalysts. When the waste soybean oil was used as a reactant, the conversion was decreased about 30%.
Keywords: Biodiesel; Solid Acid Catalyst; Soybean Oil; MoO3; MoO3-SnO2; MoO3-SnO2-CeO2 Catalyst
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