Abstract

Kamisah D Pandiangan¹, Wasinton Simanjuntak¹, Mita Rilyanti¹ Novesar Jamarun² and Syukri Arief²

DOI : http://dx.doi.org/10.13005/ojc/330623

In this study, syntheses of bifunctional catalyst (CaO-MgO/SiO₂) with different ratios of CaO: MgO:SiO₂ of 1:1:3 and 1:1:5 were carried out by sol-gel method. The catalysts were   subjected to calcination temperatures of 500, 600, 700, 800, 900^oC for 6 hours at peak temperatures, and then tested as catalyst in a series of transesterification of rubber seed oil without and with the use of coconut oil as co-reactant.  Several kinetic variables of transesterification were also investigated.  The results revealed that the catalyst with the composition of CaO-MgO/SiO₂ 1:1:5 and subjected to calcination temperature of 800°C functioned as the most active catalyst.  The highest percent of conversion (90%) was resulted from the experiment with the use of 5% catalyst, 50 mL methanol, 10% co-reactant, temperature of 70^oC and reaction time of 6 hours.

bifunctional catalyst; sol-gel; rubber seed oil; transesterification

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