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Two-step lipase catalysis for production of biodiesel

Paper ID Volume ID Publish Year Pages File Format Full-Text
3947 200 2010 6 PDF Available
Title
Two-step lipase catalysis for production of biodiesel
Abstract

Lipase-catalyzed methanolysis of vegetable oils has attracted considerable interests for the production of biodiesel (BD). However, the activity of lipase such as Novozym 435 (immobilized Candida antarctica lipase B) is negatively affected by methanol. To minimize this problem, two-step lipase catalysis was investigated. Crude palm oil (CPO), which is relatively cheaper because of avoiding refining cost, was used as the source of BD. CPO was first hydrolysed to fatty acids (FA), which was then esterified to BD. Candida rugosa and Novozym 435 lipases were used as biocatalysts for the hydrolysis of CPO and the esterification of FA, respectively. The complete conversion of CPO to FA was achieved under an optimal condition of buffer to CPO ratio 1:1 (v/v), buffer pH 7.0, lipase 0.1 wt.% of CPO, isooctane to CPO ratio 1:1 (v/v), temperature 30 °C, shaking speed 250 rpm and time 4 h. The methyl esterification of FA with 1.2-fold stoichiometric excess of methanol reached the equilibrium after 2 h at which BD yield was 98%. C. rugosa and Novozym 435 lipases were repeatedly used for 10 and 50 cycles, respectively without significant loss of their activities. The developed two-step process is very promising because of its feedstock flexibility: it can be used for production of BD and FA from crude, refined and waste oils.

Keywords
Biodiesel; Lipase; Two-step catalysis; Crude palm oil; Methanolysis
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 49, Issue 2, 15 April 2010, Pages 207–212
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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