Characterization of K2O/CaO-ZnO Catalyst for Transesterification of Soybean Oil to Biodiesel

In this study, heterogeneous solid base catalysts (K2O/CaO-ZnO) were developed and characterized for transesterification of soybean oil to biodiesel. In the catalyst, CaO-ZnO prepared by coprecipitation was promoted by K2O by impregnation method. The catalysts were characterized by using X-Ray Diffr...

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Bibliographic Details
Published in:Procedia environmental sciences 2015, Vol.23, p.394-399
Main Authors: Istadi, I., Prasetyo, Sebastianus A., Nugroho, Tito S.
Format: Article
Language:English
Subjects:
biodiesel
heterogeneous solid base catalyst
K2O/CaO-ZnO
soybean oil
transesterification
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Summary:In this study, heterogeneous solid base catalysts (K2O/CaO-ZnO) were developed and characterized for transesterification of soybean oil to biodiesel. In the catalyst, CaO-ZnO prepared by coprecipitation was promoted by K2O by impregnation method. The catalysts were characterized by using X-Ray Diffraction (XRD) and Brunauer Emmett Teller (BET) surface area. The catalysts were compared to ZnO and CaO-ZnO catalysts to study their activities in the transesterification process under suitable conditions (reaction temperature of 60 oC, catalyst loading of 6wt.%, methanol to oil molar ratio of 15:1, and reaction time of 4h). From the catalyst testing results, the 2wt.% K2O/CaO-ZnO showed the highest catalytic activity with Fatty Acid Methyl Ester (FAME) yield of 81.08%. The incorporation of K2O on the CaO-ZnO catalyst enhanced the catalytic transesterification activity due to increasing its basicity and surface area.
ISSN:1878-0296
1878-0296
DOI:10.1016/j.proenv.2015.01.056