Comparative study of catalytic performance and degradation kinetics of biodiesels produced using heterogeneous catalysts from kaolinite

This study comparatively investigates the catalytic activities and degradation kinetics of produced biodiesels using kaolinite-based heterogeneous catalysts to examine stability. The performance was tested under same operating parameter (methanol/oil ratio, 5:1, at 200 °C for 6 h). obtained biodiesel analyzed TGA equipment obtain yield, as well kinetic parameters. It observed that solid superacid SHY zeolite gave highest yield (90.76%) because higher acid strength. is in order HY<ALK<HLK<NaLK<SHY zeolite. lower HY (72.42% yield) attributed presence high basic sites, being shea butter has FFA. each sample performed data thermal oxidative frequency factor (A), activation energy, reaction were determined by employing Coats-Redfern model. first-order mechanism can satisfactorily describe all kinetics. Further, from gives EA (98.65 kJ/mol). result indicates best catalyst terms