A Method to Remove Glycidyl Esters after Refining by Adsorbent Materials and Its Kinetics
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Abstract:
A way to remove glycidyl esters (GEs) by adsorbent materials after refining was studied. Results showed that all the adsorbent materials chose in this work had a positive effect on the removal of GEs. Among these, AC1 had the best adsorption capacity, and GEs contents was decreased from 3.77 mg/kg to 0.15 mg/kg after the treatment with AC1. Its adsorbent rate was 95.92%. Adsorbent conditions also had great influences on adsorption efficiency. The most suitable amounts of adsorbent was 1%~5%, and the optimal absorption time and temperature were 30 min and 80~100 ℃, respectively. Results also showed that there were no adverse effects but even a slight improvement for oil quality after adsorption, and the induction time of palm oil treated with AC1 was increased to 19.35 h. In addition, by using adsorption kinetics to study the absorption mechanism of AC1 and KD, both materials accorded with the pseudo-second-order kinetics, indicating that they all happened to chemical adsorption, not just physical adsorption.
