A heterogeneous catalyst system, a method of preparing the catalyst system and a method of forming a biodiesel product via transesterification reactions using the catalyst system is disclosed. The catalyst system according to one aspect of the present disclosure represents a class of supported mixed metal oxides that include at least calcium oxide and another metal oxide deposited on a lanthanum oxide or cerium oxide support. Preferably, the catalysts include CaO--CeO.sub.2ZLa.sub.2O.sub.3 or CaO--La.sub.2O.sub.3/CeO.sub.2. Optionally, the catalyst may further include additional metal oxides, such as CaO--La.sub.2O.sub.3--GdOxZLa.sub.2O.sub.3.
FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT
This invention was made with government support under Contract Nos. 337842 and 446920 awarded by the U.S. Department of Energy. The U.S. government may retain certain rights to the invention.
CROSS REFERENCE TO RELATED APPLICATIONS
The present application claims the benefit of priority to PCT Application No. PCT/US2010/026646, filed Mar. 9, 2010, which application claims the benefit of U.S. Provisional Patent Application No. 61/158,560, filed Mar. 9, 2009, the entirety of which is hereby incorporated by reference.