A green and sustainable approach for esterification of glycerol using 12-tungstophosphoric acid anchored to different supports: Kinetics and effect of support

作者：Patel Anjali^*; Singh Sukriti

来源：Fuel, 2014, 118: 358-364.

DOI：10.1016/j.fuel.2013.11.005

• 12-Tungstophosphoric acid
• Heterogeneous
• Esterification
• Glycerol
• Kinetic

Environmentally benign solid acid catalysts consisting of 12-tungstophosphoric anchored to MCM-41 and zirconia were synthesized and characterized. The efficacy for the esterification of glycerol, a value added byproduct from biodiesel production was investigated. Conditions for maximum conversion was optimized by varying different reaction parameters, such as, glycerol/acetic acid mole ratio, amount of the catalyst, reaction time and reaction temperature. The kinetic study was carried out, and it was found that esterification of glycerol follows first order kinetics and the rates are not mass transfer limited. Also activation energy and DG was determined. The difference in % conversion as well as selectivity was correlated with the nature of supports, value of activation energy as well as DG. The catalysts showed potential of being used as recyclable material after simple regeneration without significant loss in conversion.

• 出版日期2014-2