Catalysts | |
Continuous Catalytic Hydrodeoxygenation of Guaiacol over Pt/SiO2 and Pt/H-MFI-90 | |
Melanie Hellinger1  Sina Baier1  Peter Mølgaard Mortensen2  Wolfgang Kleist1  Anker Degn Jensen2  Jan-Dierk Grunwaldt1  | |
[1]Institute for Chemical Technology and Polymer Chemistry (ITCP), Karlsruhe Institute of Technology, Karlsruhe D-76128, Germany | |
[2] E-Mails: | |
[3]Department of Chemical and Biochemical Engineering, Søltofts Plads, Building 229, Technical University of Denmark, Lyngby DK-2800, Denmark | |
[4] E-Mails: | |
关键词: continuous process; guaiacol; hydrodeoxygenation; 1-octanol; Pt catalysts; zeolites; bio-oil upgrading; | |
DOI : 10.3390/catal5031152 | |
来源: mdpi | |
【 摘 要 】
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.
【 授权许可】
CC BY
© 2015 by the authors; licensee MDPI, Basel, Switzerland.
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