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Main technologies in biodiesel production: State of the art and future challenges

Paper ID Volume ID Publish Year Pages File Format Full-Text
55124 47041 2012 12 PDF Available
Title
Main technologies in biodiesel production: State of the art and future challenges
Abstract

Biodiesel is a fuel safe, renewable, non-toxic, biodegradable and much less contaminant for the environment than conventional diesel. Moreover, it represents a strategic source of energy especially for the countries that have not oilfields. For these reasons, even if the cost of biodiesel is still greater than diesel from petroleum, many governments sustain this production. The cost of biodiesel is mainly affected by the cost of the feedstock but also an improvement of the adopted technology can contribute in reducing the costs. Therefore, it is imperative: to employ less expensive feedstock, that is, unrefined or waste oils; to use not edible oil coming from alternative sources as, for example, algae or Jathropa Curcas; to improve the actual technology based on the use of homogeneous alkaline catalysts through a better understanding of the reaction mechanism, to develop new biphasic kinetic models; to adopt techniques of process intensification; to introduce the use of heterogeneous catalysts, possibly finding a catalyst promoting in one step both esterification of free fatty acids and transesterification of tri-glycerides; to find new remunerative uses for the by-product glycerol. In this paper, all the mentioned aspects will be considered by reporting some of the most relevant results obtained in the last years.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (221 K)Download as PowerPoint slideHighlights► A review of the main technologies studied for producing biodiesel at lower cost is reported. ► The possibility of using new feedstock cheaper and not competing with food is mentioned. ► The possibility of intensify the traditional process catalyzed by homogeneous alkaline catalyst is reviewed. ► The main heterogeneous basic and acid catalysts studied in the literature are discussed and compared. ► New uses for the by-product glycerol reported in the literature are examined and discussed.

Keywords
Biodiesel; New production technologies; Acid–base catalysis; Process intensification
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 195, Issue 1, 15 November 2012, Pages 2–13
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