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Catalysts 2015, 5(3), 1152-1166; doi:10.3390/catal5031152

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

1
Institute for Chemical Technology and Polymer Chemistry (ITCP), Karlsruhe Institute of Technology, Karlsruhe D-76128, Germany
2
Institute of Catalysis Research and Technology (IKFT), Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen D-76344, Germany
3
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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Abstract

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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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

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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