Jump to main content
Jump to site search

Issue 8, 2017
Previous Article Next Article

Influence of acid–base properties of Mg-based catalysts on transesterification: role of magnesium silicate hydrate formation

Author affiliations

Abstract

The transesterification reaction assisted through heterogeneous basic catalysis was thoroughly studied because of its importance in transforming biomass, as for biodiesel production or lactone opening. As catalysts with the strongest basic properties are not always the most efficient ones, a series of magnesium-based materials, exhibiting a large range of acido–basic properties, was investigated. Moreover, in order to compare gas and liquid phases operating conditions, a model reaction (transesterification of ethyl acetate with methanol) was chosen. It appears that gas phase transesterification (at 393 K) requires strong basic sites, whereas magnesium silicate, exhibiting moderate basicity together with acidic properties, is a very reactive catalyst in the liquid phase (at 333 K) depending on its preparation method. The set of experimental data (XRD, XPS, DRIFTS, MEB, 29Si and 25Mg NMR) demonstrated that a magnesium silicate hydrate structure (MSH) is formed at the surface of the most active silicates. It is thus concluded that different mechanisms operate under gas and liquid conditions, and that among the magnesium silicate materials, the MSH phase exhibits specific acido–basic properties beneficial to this kind of reaction.

Graphical abstract: Influence of acid–base properties of Mg-based catalysts on transesterification: role of magnesium silicate hydrate formation

Back to tab navigation

Supplementary files

Publication details

The article was received on 14 Dec 2016, accepted on 12 Mar 2017 and first published on 13 Mar 2017


Article type: Paper
DOI: 10.1039/C6CY02604D
Citation: Catal. Sci. Technol., 2017,7, 1701-1712
  •   Request permissions

    Influence of acid–base properties of Mg-based catalysts on transesterification: role of magnesium silicate hydrate formation

    D. Cornu, L. Lin, M. M. Daou, M. Jaber, J. Krafft, V. Herledan, G. Laugel, Y. Millot and H. Lauron-Pernot, Catal. Sci. Technol., 2017, 7, 1701
    DOI: 10.1039/C6CY02604D

Search articles by author

Spotlight

Advertisements