On the impact of the preparation method on the surface basicity of Mg–Zr mixed oxide catalysts for tributyrin transesterification


Mixed metal oxides are promising heterogeneous catalysts for biofuel production from lipids via alcoholysis, however, the impact of solid acidity and/or basicity on reactivity is comparatively poorly understood. Two systematically related families of MgO–ZrO2 mixed oxide catalysts were therefore prepared by different synthetic routes to elucidate the impact of surface acid-base properties on catalytic performance in the transesterification of tributyrin with methanol. The resulting materials were characterized by TGA-MS, ICP-OES, N2 porosimetry, XRD, TEM, XPS, DRIFTS, and CO2-temperature-programmed desorption (TPD). MgO–ZrO2 catalysts prepared by both non-aqueous impregnation and citric acid-mediated sol–gel routes exhibit excellent activity and stability. The citrate routes favor highly dispersed MgO and concomitant Lewis acid-base pair formation at the interface with zirconia. However, for both the citrate and impregnation routes, tributyrin transesterification occurs over a common, strongly basic MgO active site.

Publication DOI: https://doi.org/10.3390/catal8060228
Divisions: College of Engineering & Physical Sciences
Additional Information: © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Uncontrolled Keywords: solid base,MgO, transesterification, mixed oxide,biodiesel
Publication ISSN: 2073-4344
Last Modified: 01 Apr 2024 07:25
Date Deposited: 18 Jun 2018 09:20
Full Text Link:
Related URLs: http://www.mdpi ... 73-4344/8/6/228 (Publisher URL)
PURE Output Type: Article
Published Date: 2018-05-28
Accepted Date: 2018-05-25
Authors: Rabee, Abdallah I.M.
Manayil, Jinesh (ORCID Profile 0000-0002-9864-3332)
Isaacs, Mark A.
Parlett, Christopher (ORCID Profile 0000-0002-3651-7314)
Durndell, Lee J.
Zaki, Mohamed I.
Lee, Adam
Wilson, Karen



Version: Published Version

License: Creative Commons Attribution

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