Journal
CATALYSIS SCIENCE & TECHNOLOGY
Volume 1, Issue 6, Pages 1072-1082Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1cy00022e
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Funding
- Scientific Research Foundation for the Returned Overseas Chinese Scholars
- Natural Science Basic Research Plan in Shaanxi Province of China [2010JM2003]
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A number of KF-loaded heterogeneous base catalysts were prepared by doping KF on mixed oxide or single oxide supports containing Mg, Cu, Zn, Co, Al, Cr, Ni or Fe. The catalysts were characterized and tested for the transesterification of vegetable oil with methanol to produce biodiesel, in order to elucidate the active phase(s). The experimental results showed that KF doping increased activity irrespective of the nature of the support (i.e. whether it was mixed oxide or single oxide). For all catalysts KOH, formed during the treatment of each support with KF, was demonstrated to be the active phase. The activity of KF doped catalysts is promoted by the surface F-species. On this basis, it is possible to rationalize the general effect that KF has in promoting base catalyzed activity and select suitable supports in the design of highly active KF-loaded catalysts.
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