Catalytic Epoxidation of Rice Bran Oil via an In Situ Generated Hybrid Peracids Mechanism

Abstract

In this study, in-situ formed peracid was used to generate epoxidised rice bran oil. The following were found to be the ideal epoxidation reaction parameters: (1) 85 °C reaction temperature; (2) 0.8 g catalyst loading hybrid oxygen carrier; (3) 450 rpm string speed; and (4) 1.1 molar ratio of hydrogen peroxide to rice bran oil. Under these conditions, the highest oxirane content achieved was 49 %. A mathematical model was developed in MATLAB using the fourth-order Runge-Kutta method and simulated annealing optimisation to describe the reaction’s kinetic behaviour accurately. By turning rice bran oil into a product with added value, this study helps reduce dependency on petroleum-based resources and offers important insights into reaction dynamics, which are crucial for industrial applications.Za nastanak epoksidiranog ulja rižinih mekinja, u ovom je istraživanju upotrijebljena in situ generirana peroksikiselina. Određeni su optimalni uvjeti reakcije: (1) temperatura od 85 °C, (2) 0,8 g katalizatora, (3) brzina miješanja od 450 okr min–1 te (4) molarni omjer vodikova peroksida i ulja rižinih mekinja 1 : 1. U tim uvjetima postignut je maksimalni sadržaj oksirana od 49 %. Da bi se točno opisala kinetika reakcije, razvijen je matematički model u MATLAB-u primjenjujući metodu Runge-Kutta četvrtog reda i optimizaciju simuliranim kaljenjem. Pretvorbom ulja rižinih mekinja u proizvod dodane vrijednosti, ovo istraživanje pridonosi smanjenju ovisnosti o naftnim derivatima te donosi važan uvid u dinamiku reakcije, što je iznimno bitno za industrijsku primjenu.