Purification of Crude Glycerol from Biodiesel By-product by Adsorption using Bentonite

Erniati Anzar, M. Syahirman Yusi, Yohandri Bow


The production of glycerol from biodiesel by-product obtained using waste cooking oil feed has low purity. This crude glycerol contains impurities such as methanol, catalyst, soap and water. Analysis result shows that crude glycerol contains 67.7% water, 16.7% ash with density 1.1217 g/mL. The impurities were able to be adsorbed using bentonite which was activated in sulphuric acids 1.5 M and characterized by SEM-EDX. The purified glycerol after being treated with bentonite at 60 °C for 75 minutes was fulfilled The SNI 06-1564-1995 requirement i.e. 89.5% glycerol, 4.3% water, 3.6% ash and density 1.2212 g/mL 

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DOI: http://dx.doi.org/10.24845/ijfac.v3.i3.83


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