Structure–performance relations of molybdenum- and tungsten carbide catalysts for deoxygenation

Daniel R. Stellwagen; Johannes H. Bitter

doi:10.1039/C4GC01831A

Structure–performance relations of molybdenum- and tungsten carbide catalysts for deoxygenation

Daniel R. Stellwagen*^a and Johannes H. Bitter^a^b

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* Corresponding authors

^a Department of Inorganic Chemistry and Catalysis, Utrecht University, Universiteitsweg 99, Utrecht, The Netherlands
E-mail: d.r.stellwagen@uu.nl

^b Biobased Chemistry and Technology, Wageningen University, Bornse Weilanden 9, Wageningen, The Netherlands
E-mail: harry.bitter@wur.nl
Tel: +31(0)317480303

Abstract

This work demonstrates for the first time that carbide particle size is a critical factor for the activity and stability of carbon supported tungsten- and molybdenum carbide catalysts in (hydro-)deoxygenation reactions. The stability of the catalyst was shown to increase for larger particles due to the improved resistance of the metal carbide phase against full oxidation to crystalline metal oxides under reaction conditions. In addition to the improved catalyst stability, supported molybdenum carbides were found to more than double their weight-based catalytic activity upon increasing carbide particle size from 2 to 10 nanometers. The strongly improved (de-)hydrogenation activity of these larger carbide particles also facilitated a new deoxygenation pathway for fatty acids, in which an initial hydrogenation to fatty-aldehyde is combined with a decarbonylation step. This is the first time in which this deoxygenation pathway is observed over supported tungsten- or molybdenum carbide catalysts.

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Publication details

The article was received on 21 Sep 2014, accepted on 23 Oct 2014 and first published on 23 Oct 2014

Article type: Paper

DOI: 10.1039/C4GC01831A

Citation: Green Chem., 2015,17, 582-593

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Structure–performance relations of molybdenum- and tungsten carbide catalysts for deoxygenation

D. R. Stellwagen and J. H. Bitter, Green Chem., 2015, 17, 582
DOI: 10.1039/C4GC01831A
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Green Chemistry

Structure–performance relations of molybdenum- and tungsten carbide catalysts for deoxygenation

Abstract

Supplementary files

Publication details

Structure–performance relations of molybdenum- and tungsten carbide catalysts for deoxygenation

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