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The Influence of Active Phase Loading on the Hydrodeoxygenation (HDO) of Ethylene Glycol over Promoted MoS$_{2}$/MgAl$_{2}$O$_{4}$ Catalysts

Dabros, T. M. H.; Kramer, H.; Høj, M.; Sprenger, P. 1; Grunwaldt, J.-D. ORCID iD icon 1; Gabrielsen, J.; Jensen, A. D.
1 Institut für Technische Chemie und Polymerchemie (ITCP), Karlsruher Institut für Technologie (KIT)

Abstract:

The hydrodeoxygenation (HDO) of ethylene glycol over MgAl$_{2}$O$_{4}$ supported NiMo and CoMo catalysts with around 0.8 and 3 wt% Mo loading was studied in a continuous flow reactor setup operated at 27 bar H$_{2}$ and 400 °C. A co-feed of H2S of typically 550 ppm was beneficial for both deoxygenation and hydrogenation and for enhancing catalyst stability. With 2.8-3.3 wt% Mo, a total carbon based gas yield of 80-100 % was obtained with an ethane yield of 36-50 % at up to 118 h on stream. No ethylene was detected. A moderate selectivity towards HDO was obtained, but cracking and HDO were generally catalyzed to the same extent by the active phase. Thus, the C2/C1 ratio of gaseous products was 1.1-1.5 for all prepared catalysts independent on Mo loading (0.8-3.3 wt%), but higher yields of C1-C3 gas products were obtained with higher loading catalysts. Similar activities were obtained from Ni and Co promoted catalysts. For the low loading catalysts (0.83-0.88 wt% Mo), a slightly higher hydrogenation activity was observed over NiMo compared to CoMo, giving a relatively higher yield of ethane compared to ethylene. Addition of 30 wt% water to the ethylene glycol feed did not result in significant deactivation. ... mehr


Postprint §
DOI: 10.5445/IR/1000095136
Veröffentlicht am 16.04.2020
Originalveröffentlichung
DOI: 10.1007/s11244-019-01169-y
Scopus
Zitationen: 4
Web of Science
Zitationen: 4
Dimensions
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Technische Chemie und Polymerchemie (ITCP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 1022-5528, 1572-9028
KITopen-ID: 1000095136
Erschienen in Topics in catalysis
Verlag Springer
Band 62
Seiten 752–763
Vorab online veröffentlicht am 15.04.2019
Schlagwörter Hydrodeoxygenation, bio-oil, catalytic hydropyrolysis, transportation fuel, molybdenum sulfide
Nachgewiesen in Web of Science
Scopus
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