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How surface and textural properties affect the behaviour of Mn-based catalysts during transesterification reaction to produce biodiesel

Paper ID Volume ID Publish Year Pages File Format Full-Text
55127 47041 2012 12 PDF Available
Title
How surface and textural properties affect the behaviour of Mn-based catalysts during transesterification reaction to produce biodiesel
Abstract

This work was aimed at investigating the catalytic behaviour of MnCeOx and MnZrOx systems in biodiesel production by sunflower oil transesterification reaction with methanol. Surface and textural properties were deeply investigated by different techniques whereas CH3OH surface reactivity was evaluated by FT-IR and MeOH-TPSR measurements, in order to disclose the nature of the active sites and to provide evidences of a complex reaction mechanism, in which a synergic role of Mn and carrier significantly affects the methyl esters productivity. Direct relationship among catalytic activity, density of strong basic sites and amount of adsorbed bidentate methoxy species were found. The doubly-bridging coordinated methoxy species were recognized as the ones mainly involved in the transesterification reaction. Anyway, even if the basic strength resulted to be considered the key factor for MeOH activation, only the proper balance between basic and acid sites controls catalyst behaviour. The linear dependence of activity with catalyst porosity clearly demonstrated that a wide porous structure is required to enhance the sites accessibility to large triglycerides (TGs) molecules.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (191 K)Download as PowerPoint slideHighlights► Transesterification reaction of sunflower oil with methanol to produce biodiesel. ► Catalytic behaviour of MnCeOx and MnZrOx systems. ► Identification of the active species involved in the transesterification reaction. ► Density of strong basic sites and amount of adsorbed bidentate methoxy species.

Keywords
Biodiesel; Transesterification; Mn catalysts; Basicity; Spectroscopic study; Reaction mechanism
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 195, Issue 1, 15 November 2012, Pages 32–43
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