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Transesterification of a vegetal oil with methanol catalyzed by a silica fibre reinforced aerogel encapsulated lipase

Paper ID Volume ID Publish Year Pages File Format Full-Text
43102 45955 2008 8 PDF Available
Title
Transesterification of a vegetal oil with methanol catalyzed by a silica fibre reinforced aerogel encapsulated lipase
Abstract

A commercial lipase solution from Candida antartica, Lipozyme®, was encapsulated in silica aerogels reinforced with silica quartz fibre felt. This biocatalyst was applied in biodiesel synthesis by direct transesterification of sunflower seed oil with methanol, without any other solvent. With a molar ratio of methanol to oil of 1, the encapsulated enzyme achieved ∼90% methanol conversion after ∼50 h at 40 °C. The recycling activity increased by ∼40% after the first test, then it slowly decreased in further tests to reach an activity still 20% higher than initially, during the fifth test. Textural and structural analysis of the aerogels before and after catalytic tests showed that this improvement was associated with a modification of the liquid medium inside the aerogel, by preferential adsorption of glycerol. The aerogel samples were also compared to a commercial CALB product immobilized on polymer beads with a different enzyme loading, from Fluka. This product showed a better activity during the first test but its activity decreased by ≈20% during a second test.

Graphical abstractA commercial lipase solution, Lipozyme®, was encapsulated in silica aerogels reinforced with silica quartz fibre felt. It was applied in biodiesel synthesis by transesterification of sunflower seed oil with methanol, without any other solvent. The figure below shows its activity compared to other commercial products, as well as its better activity during a second test. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Lipase; Transesterification; Silica; Aerogel; Ionic liquids
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Transesterification of a vegetal oil with methanol catalyzed by a silica fibre reinforced aerogel encapsulated lipase
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 344, Issues 1–2, 15 July 2008, Pages 70–77
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us