TRANSESTERIFICATION OF CRUDE JATROPHA CURCASLINNAEUS OIL CATALYZED BY WASTE MARBLE DERIVED SOLID CATALYST
DOI:
https://doi.org/10.4314/njt.341.900Keywords:
Waste marble, Crude jatropha oil, Heterogeneous catalyst, TransesterificationAbstract
Transesterification of crude jatropha oil with methanol was investigated using a heterogeneous catalyst derived from waste marble. The barium enhanced waste marble catalyst was prepared via precipitation/impregnation methods and showed high performance to methyl ester conversion when calcined at 830 oC for 4 h. The high activity of the solid oxide catalyst resulted from the basic-sites generated from the synergetic composite formed with high dispersion of the active species as indicated from characterization data with Brunauer-Emmett-Teller (BET) surface area, 56.01 m2/g, average pore size, 123.63Å, and pore volume, 0.17 cm3/g. The methyl ester content of 70.36% was achieved over the catalyst within 4 h under the optimal transesterification conditions of methanol/oil molar ratio of 15:1, catalyst amount of 5 wt % and reaction temperature of 65 oC. The research provides insight into application of waste marble enhanced with barium as potential catalyst in the heterogeneously catalyzed transesterification of crude jatropha oil in mild conditions.
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