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Catalysts 2015, 5(3), 1152-1166;

Continuous Catalytic Hydrodeoxygenation of Guaiacol over Pt/SiO2 and Pt/H-MFI-90

Institute for Chemical Technology and Polymer Chemistry (ITCP), Karlsruhe Institute of Technology, Karlsruhe D-76128, Germany
Institute of Catalysis Research and Technology (IKFT), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen D-76344, Germany
Department of Chemical and Biochemical Engineering, Søltofts Plads, Building 229, Technical University of Denmark, Lyngby DK-2800, Denmark
Author to whom correspondence should be addressed.
Academic Editor: Keith Hohn
Received: 28 April 2015 / Revised: 17 June 2015 / Accepted: 19 June 2015 / Published: 3 July 2015
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Hydrodeoxygenation of guaiacol in the presence of 1-octanol was studied in a fixed-bed reactor under mild conditions (50–250 °C) over platinum particles supported on silica (Pt/SiO2) and a zeolite with framework type MFI at a Si/Al-ratio of 45 (Pt/H-MFI-90). The deoxygenation selectivity strongly depended on the support and the temperature. Both guaiacol and octanol were rapidly deoxygenated in the presence of hydrogen over Pt/H-MFI-90 at 250 °C to cyclohexane and octane, respectively. In contrast, Pt/SiO2 mostly showed hydrogenation, but hardly any deoxygenation activity. The acidic sites of the MFI-90 support lead to improved deoxygenation performance at the mild temperature conditions of this study. Significant conversions under reaction conditions applied already occurred at temperatures of 200 °C. However, during long-term stability tests, the Pt/H-MFI-90 catalyst deactivated after more than 30 h, probably due to carbon deposition, whereas Pt/SiO2 was more stable. The catalytic activity of the zeolite catalyst could only partly be regained by calcination in air, as some of the acidic sites were lost. View Full-Text
Keywords: continuous process; guaiacol; hydrodeoxygenation; 1-octanol; Pt catalysts; zeolites; bio-oil upgrading continuous process; guaiacol; hydrodeoxygenation; 1-octanol; Pt catalysts; zeolites; bio-oil upgrading

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Hellinger, M.; Baier, S.; Mortensen, P.M.; Kleist, W.; Jensen, A.D.; Grunwaldt, J.-D. Continuous Catalytic Hydrodeoxygenation of Guaiacol over Pt/SiO2 and Pt/H-MFI-90. Catalysts 2015, 5, 1152-1166.

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