A Novel Approach For The Evaluation Of Bio-Oils Obtained From Chestnut Shells By Different Processes

In this study, the contents of both extraction liquid and pyrolysis liquid products of chestnut shells were characterized using Gas Chromatography-Mass Spectrometry (GC-MS), Liquid Chromatography-Mass Spectrometry (LC/MS-MS) and Fourier Infrared Spectroscopy (FT-IR). In LC-MS/MS analyses; sample samples obtained from different processes were determined using 41 phenolic standards. The results of LC-MS/MS analysis showed that both the type and amount of phenolic compounds in the liquid extract were significantly higher than those in the pyrolysis liquid. According to the analysis results, very valuable phenolic compounds such as catechin (2526.96 µg/g extract), gallic acid (175.02 µg/g extract), protocatechuic acid (76.47 µg/g extract) were obtained in high amounts. FTIR analysis of the liquid samples obtained by two different processes was performed. GC-MS analysis revealed stearic acid methyl ester (28.78%), palmitic acid methyl ester (27.81%) and o-xylene (9.29%) in the liquid extract. However, higher amounts of linoleic acid, methyl ester (32.45%), palmitic acid methyl ester (23.06%) and linolenic acid, methyl ester oleic acid, methyl ester (11.32%) compounds were detected in the liquid extract obtained by pyrolysis compared to the normal liquid extract content. All these findings show that the processing method and physicochemical conditions are very important in obtaining valuable compounds such as phenolic and organic acids from plant products such as chestnut bark.