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Hydrodeoxygenation (HDO) of aliphatic oxygenates and phenol over NiMo/MgAl$_{2}$O$_{4}$: Reactivity, inhibition, and catalyst reactivation

Dabros, T. M. H.; Andersen, M. L.; Lindahl, S. B.; Hansen, T. W.; Høj, M.; Gabrielsen, J.; Grunwaldt, Jan-Dierk; Jensen, A. D.

Abstract:
This study provides new insights into sustainable fuel production by upgrading bio-derived oxygenates by catalytic hydrodeoxygenation (HDO). HDO of ethylene glycol (EG), cyclohexanol (Cyc), acetic acid (AcOH), and phenol (Phe) was investigated using a Ni-MoS$_{2}$/MgAl$_{2}$O$_{4}$ catalyst. In addition, HDO of a mixture of Phe/EG and Cyc/EG was studied as a first step towards the complex mixture in biomass pyrolysis vapor and bio-oil. Activity tests were performed in a fixed bed reactor at 380–450 °C, 27 bar H2, 550 vol ppm H2S, and up to 220 h on stream. Acetic acid plugged the reactor inlet by carbon deposition within 2 h on stream, underlining the challenges of upgrading highly reactive oxygenates. For ethylene glycol and cyclohexanol, steady state conversion was obtained in the temperature range of 380–415 °C. The HDO macro-kinetics were assessed in terms of consecutive dehydration and hydrogenation reactions. The results indicate that HDO of ethylene glycol and cyclohexanol involve different active sites. There was no significant influence from phenol or cyclohexanol on the rate of ethylene glycol HDO. However, a pronounced inhibiting effect from ethylene glycol on the HDO of cyclohexanol was observed. ... mehr

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Postprint §
DOI: 10.5445/IR/1000097265
Veröffentlicht am 07.01.2020
Originalveröffentlichung
DOI: 10.3390/catal9060521
Scopus
Zitationen: 9
Web of Science
Zitationen: 7
Dimensions
Zitationen: 7
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Katalyseforschung und -technologie (IKFT)
Institut für Technische Chemie und Polymerchemie (ITCP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 2073-4344
KITopen-ID: 1000097265
HGF-Programm 37.03.01 (POF III, LK 01) Catalysts and Mechanisms
Erschienen in Catalysts
Verlag MDPI
Band 9
Heft 6
Seiten Art.-Nr.: 521
Schlagwörter Hydrodeoxygenation (HDO); ethylene glycol; acetic acid; cyclohexanol; phenol; molybdenum sulfides; biomass
Nachgewiesen in Dimensions
Web of Science
Scopus
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