Interest in conversion of biomass into renewable fuels has motivated development of thermochemical methods for production of bio-oil and development of hydrodeoxygenation catalysts for upgrading the oil.  The catalytic activity of reduced tungsten oxide bronze catalysts for the conversion of guaiacol was explored as a representative compound from bio-oil. The reactions were carried out in a trickle bed reactor at various concentrations of the reactant and hydrogen pressure, as well as varying catalyst activation and reaction temperatures.  The reaction pathway from guaiacol to phenol by demethoxylation, followed by hydrogenation to cyclohexanol, and finally dehydration to cyclohexene was determined experimentally.  Kinetic data revealed approximately first order dependence on hydrogen pressure and zeroth order dependence on guaiacol concentration. Langmuir-Hinshelwood-Hougan-Watson models were tested within a plug flow reactor model. The best fit was for a reaction mechanism in which the guaiacol methoxy C-O bond scission was the rate controlling step with guaiacol and some phenol blocking active sites.

Liquid phase hydrodeoxygenation of guaiacol by tungsten oxide bronze catalysts

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.