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The Influence of Active Phase Loading on the Hydrodeoxygenation (HDO) of Ethylene Glycol over Promoted MoS2/MgAl2O4 Catalysts

  • Trine M. H. Dabros
  • Hendrik Kramer
  • Martin Høj
  • Paul Sprenger
  • Jan-Dierk Grunwaldt
  • Jostein Gabrielsen
  • Anker Degn JensenEmail author
Original Paper
  • 13 Downloads

Abstract

The hydrodeoxygenation (HDO) of ethylene glycol over MgAl2O4 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 H2 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. Instead, the main source of deactivation was carbon deposition, which was favored at limited hydrogenation activity and thus, was more severe for the low loading catalysts.

Keywords

Hydrodeoxygenation Bio-oil Catalytic hydropyrolysis Transportation fuel Molybdenum sulfide 

Notes

Acknowledgments

This work was supported by Innovation Fund Denmark (formerly The Danish Council for Strategic Research, The Programme Commission on Sustainable Energy and Environment) [Project 1305-0001 5B]. Karlsruhe Institute of Technology (KIT) and the German Research Foundation (DFG) financed the Raman spectrometer (INST 121384/73-1). Thomas Willum Hansen at The Center for Electron Nanoscopy (CEN) at DTU aided this work by performing transmission electron microscopy imaging.

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

11244_2019_1169_MOESM1_ESM.docx (1.5 mb)
Supplementary material 1 (DOCX 1581 kb) The supplementary material contains details on NH3-TPD, additional activity test results, and TEM images.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Trine M. H. Dabros
    • 1
    • 5
  • Hendrik Kramer
    • 1
    • 2
  • Martin Høj
    • 1
  • Paul Sprenger
    • 3
  • Jan-Dierk Grunwaldt
    • 3
  • Jostein Gabrielsen
    • 4
  • Anker Degn Jensen
    • 1
    Email author
  1. 1.Department of Chemical and Biochemical EngineeringTechnical University of Denmark (DTU)Kgs. LyngbyDenmark
  2. 2.IWT Foundation Institute of Material ScienceUniversity of BremenBremenGermany
  3. 3.Institute for Chemical Technology and Polymer ChemistryKarlsruhe Institute of Technology (KIT)KarlsruheGermany
  4. 4.Haldor Topsøe A/SKgs. LyngbyDenmark
  5. 5.Haldor Topsøe A/SKgs. LyngbyDenmark

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