Influence of Nickel Loading and the Synthesis Method on the Efficiency of Ni/TiO 2 Catalysts for Renewable Diesel Production

George Petropoulos, John Zafeiropoulos, Eleana Kordouli (), Alexis Lycourghiotis, Christos Kordulis and Kyriakos Bourikas
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George Petropoulos: School of Science and Technology, Hellenic Open University, Parodos Aristotelous 18, 26335 Patras, Greece
John Zafeiropoulos: School of Science and Technology, Hellenic Open University, Parodos Aristotelous 18, 26335 Patras, Greece
Eleana Kordouli: School of Science and Technology, Hellenic Open University, Parodos Aristotelous 18, 26335 Patras, Greece
Alexis Lycourghiotis: School of Science and Technology, Hellenic Open University, Parodos Aristotelous 18, 26335 Patras, Greece
Christos Kordulis: Department of Chemistry, University of Patras, 26504 Patras, Greece
Kyriakos Bourikas: School of Science and Technology, Hellenic Open University, Parodos Aristotelous 18, 26335 Patras, Greece

Energies, 2023, vol. 16, issue 11, 1-15

Abstract: The efficiency of Ni/TiO 2 catalysts for renewable diesel production was evaluated in the present study. Two series of catalysts were synthesized and characterized using various physicochemical techniques (N 2 physisorption, XRD, SEM, XPS, H 2 -TPR, and NH 3 –TPD). In the first series of catalysts, successive dry impregnations (SDI) were used for depositing 10, 20, 30, 50, and 60 wt.% Ni. The yield towards renewable diesel is maximized over the catalyst with 50 wt.% Ni loading. Selecting this optimum loading, a second series of catalysts were synthesized via three additional preparation methods: wet impregnation (WI) and deposition–precipitation using either ammonia (DP-NH 3 ) or urea (DP-Urea) as the precipitation agent. The catalysts’ efficiency in the production of green diesel is influenced by the preparation method following the order: DP-Urea > DP-NH 3 > WI ≈ SDI. The metallic surface area and the balanced acidity mainly determine the performance of the catalysts.

Keywords: titania; green diesel; selective deoxygenation; biofuels; nickel catalysts; renewable diesel (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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