Abstract
The preparation of biodiesel by three step transesterification three-step method consists of Saponification followed by acidification to produce KOME (Karanja Oil Methyl Ester)and finally esterification of KOME to produce biodiesel.The objective of this research is the comparison among different adsorbents such as Ludox (Colloidal Silicate) and Fumed silica which were used for the purification of biodiesel. Used adsorbents werereused again as adsorbents for the removal of glycerin from biodiesel and evaluate the effectiveness of biodiesel purity. Furthermore, this study compared the results of distilled water washing also. It was observed that Ludox, fumed silica gel and distilled water produced yield about 93%, 91% and 83% respectively. Highest yield was obtained with Ludox at 100°C temperature with H3PO4 as acid catalyst and NaOH as base catalyst with methanol, (3:1) alcohol to oil molar ratio in 90 min.
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