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A continuous catalytic system for biodiesel production

Paper ID Volume ID Publish Year Pages File Format Full-Text
43257 45960 2008 10 PDF Available
Title
A continuous catalytic system for biodiesel production
Abstract

A novel continuous fixed bed reactor process has been developed for the production of biodiesel using a metal oxide-based catalyst. Porous zirconia, titania and alumina micro-particulate heterogeneous catalysts are shown to be capable of continuous rapid esterification and transesterfication reactions under high pressure (ca. 2500 psi) and elevated temperature (300–450 °C). The continuous transesterification of triglycerides and simultaneous esterification of free fatty acids with residence times as low as 5.4 s is described. Biodiesel produced from soybean oil, acidulated soapstock, tall oil, algae oil, and corn oil with different alcohols to make different alkyl esters using this new process pass all current ASTM testing specifications. Furthermore, the economics of this novel process is much more cost competitive due to the use of inexpensive lipid feedstocks that often contain high levels of free fatty acids. The process has been shown to easily scale up a factor of 49 for more than 115 h of continuous operation without loss of conversion efficiency. The increased use of biodiesel world-wide could help reduce the emission of greenhouse gases that are linked to the progression of global warming.

Graphical abstractA novel continuous fixed bed reactor process has been developed for the production of biodiesel using a metal oxide-based catalyst. Porous zirconia, titania and alumina micro-particulate heterogeneous catalysts are shown to be capable of continuous rapid esterification and transesterfication reactions under high pressure (ca. 3000 psi) and elevated temperature (300–450 °C). The continuous transesterification of triglycerides and simultaneous esterification of free fatty acids with contact times as low as 5.4 s is described. Biodiesel produced from a variety of lipid and alcohol feedstocks using this new process pass all current ASTM testing specifications. Furthermore, the economics of this novel process is much more cost competitive due to the use of inexpensive lipid feedstocks that often contain high levels of free fatty acids. The process has been shown to easily scale up a factor of 49 for more than 115 h of continuous operation without loss of conversion efficiency. The increased use of biodiesel world-wide could help reduce the emission of greenhouse gases.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Biodiesel; Esterification; Transesterification; Alumina; Titania; Zirconia; Heterogeneous fixed bed catalyst; Alkyl alcohols
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 343, Issues 1–2, 1 July 2008, Pages 39–48
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