Catalytic Performance and Characterization of Promoted K-La/ZSM-۵ Nanocatalyst for Biodiesel Production

The promoted K-La nanocatalysts supported on ZSM-۵ zeolite were prepared via wetness impregnation method and tested for biodiesel production from soybean oil. The effects of different weight percentage of La, loading of K as a promoter and calcination conditions on structure and activity of catalyst were investigated. Results showed that the supported catalyst containing ۷wt.% of La was promoted with ۱wt.% of K is an optimal catalyst for biodiesel production. The best operational conditions were the CH۳OH/oil=۱۲/۱ molar ratio at ۶۰˚C with mechanical stirring ۵۰۰ rpm for ۳ h. The biodiesel yield reached ۹۰% under the optimal operational conditions. It was found that K-La/ZSM-۵ nanocatalyst have high basic sites and catalytic activity for biodiesel production. Characterization of catalysts was carried out by using Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Temperature Programmed Desorption (TPD), X-Ray Diffraction (XRD), Fourier Transform-InfraRed(FT-IR) spectroscopy and N۲ adsorption-desorption measurements methods.

کلیدواژه ها:

: Biodiesel ، Wetness impregnation ، Calcination conditions ، Operational condition ، Characterization