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LDH-catalyzed esterification of lauric acid with glycerol in solvent-free system

Paper ID Volume ID Publish Year Pages File Format Full-Text
39840 45837 2014 7 PDF Available
Title
LDH-catalyzed esterification of lauric acid with glycerol in solvent-free system
Abstract

•We used a layered double hydroxide (LDH, Mg–Al–CO3) as catalyst to MAG and DAG production with glycerol.•Auto-thermal and HDL-catalyzed conversion were well investigated.•Higher glycerol conversions were observed.

Direct esterification of waste oil materials (high FFA contents) and glycerol can be an important way to improve the energy goals and afford alternative sources to emulsifier production for food and cosmetics industry. This work reports an experimental study of free-solvent esterification of lauric acid with glycerol using a LDH (layered double hydroxide, Mg–Al–CO3) as catalyst. The experiments were performed in a mechanically stirred reactor evaluating the effect of temperature (100–180 °C), lauric acid to glycerol molar ratio (1:1–3:1) and catalyst content (2–8 wt%). The results showed that relative high glycerol conversions (99%) can be obtained for the lauric acid esterification with glycerol leading to monolaurine and dilaurine. Results show that free-solvent LDH-catalyzed lauric acid esterification with glycerol might be a potential alternative route to conventional methods, as high contents of reaction products and selectivity was achieved. Furthermore, the results show that the LDH catalyst used was able to drive the reaction to the equilibrium in a relative short time – up to two hours.

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Keywords
Fatty acid esterification; Heterogeneous catalyst; Acylglycerols
First Page Preview
LDH-catalyzed esterification of lauric acid with glycerol in solvent-free system
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 475, 5 April 2014, Pages 242–248
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis