Abstract
This research aims to develop the La2O3/CaO catalyst derived from eggshells by physical mixing and impregnation methods at various La contents. The synthesized catalyst was characterized using several techniques. The catalyst activity was tested via transesterification. It was found that La2O3/CaO obtained from physical mixing with the La content of 5%mol gave the maximum FAME yield (92.3%) due to the synergistic effect indicated by dual BrØnsted and Lewis basic sites with the highest basicity and surface area. La2O3/CaO obtained from the impregnation method gave the lower FAME yield due to the lower total basicity and BET surface area.
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