Investigating physicochemical properties of MgO catalysts for the gas phase conversion of glycerol

Mugford, Karl, Smith, Louise R., Douthwaite, Mark, Dummer, Nicholas F. ORCID: https://orcid.org/0000-0002-0946-6304, Willock, David J. ORCID: https://orcid.org/0000-0002-8893-1090, Hutchings, Graham J. ORCID: https://orcid.org/0000-0001-8885-1560 and Taylor, Stuart H. ORCID: https://orcid.org/0000-0002-1933-4874 2024. Investigating physicochemical properties of MgO catalysts for the gas phase conversion of glycerol. ARKIVOC 2024 (3) , 202412252. 10.24820/ark.5550190.p012.252

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Abstract

The gas phase conversion of glycerol to methanol is a complex reaction with numerous side reactions. Herein, a series of MgO materials have been prepared and calcined at a range of temperatures to investigate the influence of calcination temperature on the physicochemical properties of MgO and the subsequent effect on catalytic performance. XRD, N2-physisorption and TEM were used to explore the properties of the materials, with CO2 adsorption techniques utilised to investigate the basic properties of the catalysts. Catalyst testing showed that observed carbon balance increased with decreasing basicity, with the “missing” carbon attributed to the formation of high molecular weight products that are not routinely quantified. The formation of high molecular weight products was favoured by hydroxylated MgO surfaces, with the extent of surface hydroxylation relating to the nature of the basic sites. MgO calcined at a temperature of 650 °C exhibited a full carbon balance which was attributed to the low relative proportion of low-coordinate O2- sites, and the associated low degree of surface hydroxylation.

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Chemistry Cardiff Catalysis Institute (CCI)
Publisher:	ARKAT USA
ISSN:	1551-7012
Funders:	EPSRC
Date of First Compliant Deposit:	2 October 2024
Date of Acceptance:	2 August 2024
Last Modified:	03 Oct 2024 11:45
URI:	https://orca.cardiff.ac.uk/id/eprint/172534

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