Biodiesel produced by the transesterification of vegetable oils (VOs) is a promising alternative fuel to diesel which can overcome limited fossil fuel resources and environmental concern. In this work, an environmentally benign process for the production of biodiesel from used VOs by heterogeneous catalyst has been developed. Free fatty acids contained in used VOs, which cause several severe problems for the transesterification catalyzed by base catalyst, were converted to fatty acid methyl esters (FAME). The activity of several heterogeneous acid catalysts was investigated. Sulfated zirconia showed the highest activity among them. The optimization of the reaction conditions was also carried out.
Bibliographical noteFunding Information:
Financial support by the Grant-in-aid from the Industrial Waste Recycling R&D Center and the Ministry of Science and Technology is highly appreciated. The authors also appreciate the support by research grants from the Korea Science and Engineering Foundation (KOSEF) through the Applied Rheology Center (ARC) at Korea University.
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry