Characterization and analysis of the triglyceride transesterification process

Kundu, R and De, S (2021) Characterization and analysis of the triglyceride transesterification process. Biomass Conversion and Biorefinery .

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Nuclear magnetic resonance (NMR) spectroscopy has been employed to study the triglyceride transesterification process and characterizes the triglyceride, fatty acid methyl esters, and valorized products from biodiesel waste. Detailed NMR studies such as H-1, C-13, DEPT-135, HMBC (H-1-C-13), HMQC (H-1-C-13), and COSY (H-1-H-1) have been performed to analyze the transesterification reaction mixture and the products. Both unused sunflower oil and used sunflower oil (waste cooking oil) were used as a triglyceride source for transesterification reaction. Zero-waste valorization of biodiesel waste is successfully demonstrated and the low-value byproduct is purified into a high-value glycerol product. Neutralization of the byproduct with hydrochloric acid produces a significant amount of salt that has been separated, washed with an organic solvent, and recrystallized to white crystalline potassium chloride. Free fatty acids and fatty acid esters have also been isolated from the acidified byproduct and utilized for surfactant preparation. Reduced pressure distillation of the aqueous glycerol layer followed by passing the distilled liquid through the resin column resulted in an odorless transparent viscous liquid. The zero-waste valorization of biodiesel waste realizes a holistic approach for resource management and sustainable development for future generations.

Item Type:Article
Official URL/DOI:https://10.1007/s13399-021-01785-3
Uncontrolled Keywords:Triglyceride; transesterification; glycerol; fatty acid; fatty acid ester; waste valorization; biodiesel production; glycerol purification; crude glycerol; h-1-nmr; glycol
Divisions:Material Science and Technology
ID Code:8422
Deposited By:Dr Mita Tarafder
Deposited On:05 Oct 2021 19:27
Last Modified:05 Oct 2021 19:27
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