Utilization of Microwave Energy for Bio-Oil Extraction from Bauhinia Variegata Seeds: A Short-Time Technology

The oil extraction from Bauhinia variegata seeds to produce biodiesel was performed using microwave-assisted extraction. About, ۹ combinations of solvents were employed, and found that hexane-acetone (۸۰:۲۰ mL) gave a better yield, and the maximum bio-oil yield was found to be ۲۹.۰۳±۰.۶۱ % at the optimal condition of ۹ min of processing time with a supply of ۲۴۰ W and ۱۲ mL/g of solvent volume. The presence of functional groups in the Bauhinia variegata seed oil was identified using FT-IR analysis and the fatty acid composition was analyzed using GC-FID. The results reveal a predominant fatty acid (C۱۸:۲) present in the group was linoleic (about ۴۳.۴%). From scanning electron microscopy analysis it was observed that the microwave treatment promoted rapid extraction of oil, as a structure of raw materials was ruptured. The physicochemical properties of the oil were determined as per ASTM D۶۷۵۱ and found that a free fatty acids value of less than one can be directly treated for the transesterification process. The results from this study suggest that MAE is an efficient and eco-friendly method to extract oil from Bauhinia variegata seeds in bio-diesel production.

کلیدواژه ها:

Microwave-assisted extraction ، Optimization ، Bauhinia variegata ، fatty acid composition ، physicochemical properties