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Hydrodeoxygenation of guaiacol as model compound for pyrolysis oil on transition metal phosphide hydroprocessing catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
41650 45895 2011 6 PDF Available
Title
Hydrodeoxygenation of guaiacol as model compound for pyrolysis oil on transition metal phosphide hydroprocessing catalysts
Abstract

The gas phase hydrodeoxygenation (HDO) of guaiacol, as a model compound for pyrolysis oil, was tested on a series of novel hydroprocessing catalysts – transition metal phosphides which included Ni2P/SiO2, Fe2P/SiO2, MoP/SiO2, Co2P/SiO2 and WP/SiO2. The turnover frequency based on active sites titrated by the chemisorption of CO followed the order: Ni2P > Co2P > Fe2P, WP, MoP. The major products from hydrodeoxygenation of guaiacol for the most active phosphides were benzene and phenol, with a small amount of methoxybenzene formed. Kinetic studies revealed the formation of reaction intermediates such as catechol and cresol at short contact times. A commercial catalyst 5% Pd/Al2O3 was more active than the metal phosphides at lower contact time but produced only catechol. A commercial CoMoS/Al2O3 deactivated quickly and showed little activity for the HDO of guaiacol at these conditions. Thus, transition metal phosphides are promising materials for catalytic HDO of biofuels.

Graphical abstractTransition metal phosphides were active for the hydrodeoxygenation of guaiacol producing benzene and phenol as the major products. The turnover frequency based on active sites titrated by the chemisorption of CO followed the order: Ni2P > Co2P > Fe2P, WP, MoP. A commercial catalyst 5% Pd/Al2O3 produced only catechol, while a commercial CoMoS/Al2O3 showed little activity for HDO and deactivated quickly.Figure optionsDownload full-size imageDownload high-quality image (45 K)Download as PowerPoint slide

Keywords
Hydrodeoxygenation; Guaiacol; Biooil; Transition metal phosphides; Ni2P; CoMoS
First Page Preview
Hydrodeoxygenation of guaiacol as model compound for pyrolysis oil on transition metal phosphide hydroprocessing catalysts
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 391, Issues 1–2, 4 January 2011, Pages 305–310
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis