Yoo, Sung Jin Lee, Hong-shik Veriansyah, Bambang Kim, Jaehoon Kim, Jae-Duck Lee, Youn-Woo 2024-01-20T18:04:48Z 2024-01-20T18:04:48Z 2022-01-10 2010-11 0960-8524 https://pubs.kist.re.kr/handle/201004/130934 This study examined the synthesis of biodiesel using supercritical or subcritical methanol with metal oxide catalysts. The transesterification of rapeseed oil was carried out with the metal oxide catalysts (SrO, CaO, ZnO, TiO2 and ZrO2) to determine the most effective heterogeneous catalyst having the highest catalytic activity with minimum weight loss caused by dissolution. SrO and CaO dissolved in the biodiesel during the reaction because they were transformed to strontium methoxide and calcium methoxide, respectively. ZnO was the optimum catalyst for the transesterification of rapeseed oil owing to its high activity and minimum weight loss in supercritical methanol. The optimal reaction conditions included a molar ratio of methanol to oil of 40 in the presence of 1.0 wt.% ZnO and a reaction time of 10 min. The supercritical process with ZnO as a catalyst appears economically viable. (C) 2010 Elsevier Ltd. All rights reserved. English ELSEVIER SCI LTD SOLID BASE CATALYST SOYBEAN OIL CALCIUM-OXIDE FUEL PRODUCTION VEGETABLE-OILS PALM OIL TRANSESTERIFICATION Synthesis of biodiesel from rapeseed oil using supercritical methanol with metal oxide catalysts Article 10.1016/j.biortech.2010.06.073 1 BIORESOURCE TECHNOLOGY, v.101, no.22, pp.8686 - 8689 BIORESOURCE TECHNOLOGY 101 22 8686 8689 scie scopus 000281262900029 2-s2.0-77955176214 Agricultural Engineering Biotechnology & Applied Microbiology Energy & Fuels Agriculture Biotechnology & Applied Microbiology Energy & Fuels Article SOLID BASE CATALYST SOYBEAN OIL CALCIUM-OXIDE FUEL PRODUCTION VEGETABLE-OILS PALM OIL TRANSESTERIFICATION Biodiesel Transesterification Metal oxide Supercritical methanol Heterogeneous catalyst