Characterization of Dolomite Promoted by NaAlO2 and Application as Catalyst in Transesterification by Response Surface Methodology
发表刊物：
ChemistrySelect
摘要：
The effective heterogeneous base catalysts are synthesized to
intensify the catalytic capacity of dolomite via the wet impregnation method with NaAlO2. Compared with the
calcined natural dolomite, the catalyst promoted by 10% NaAlO2 possesses the higher basic density and more developed mesoporous structure, where the better catalytic activity is
performed to transesterify palm oil with methanol. Response
surface methodology with Box-Behnken Design (RSM-BBD) is
used to investigate the combined effects of the catalyst loaded amount, molar ratio of methanol to oil, transesterification
temperature and duration on biodiesel yield. Results show that
the highest yield of 99.27% is achieved with the 5.30 wt.%
catalyst loaded amount and 12.39 molar ratio of methanol to
oil at 65.26 °C for 2.11 h. The catalyst shows superior stability
and efficiency of 89.92% is achieved for the fifth reused cycle,
where for the pure calcined dolomite it is 77.58%. Also, the
physicochemical indices of the purified transesterification
product are in accordance with ASTM D6751 standard.
