Hydrodeoxygenation of phenolic model compounds over zirconia supported Ir and Ni-catalysts

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Moldir Alda-Onggar, Päivi Mäki-Arvela, Atte Aho, Irina L. Simakova, Dmitry Yu. Murzin
Publiceringsår: 2018
Tidskrift: Reaction Kinetics, Mechanisms and Catalysis
Tidskriftsakronym: React. Kinet., Mech. Catal.
eISSN: 1878-5204


Abstrakt

The hydrodeoxygenation (HDO) of three different phenolic model
compounds, isoeugenol, guaiacol and vanillin was investigated using
Ir/ZrO2 and Ni/ZrO2 as heterogeneous catalysts.
The catalysts were prepared by incipient wetness impregnation and
characterized by transmission electron microscopy, nitrogen adsorption,
FTIR pyridine adsorption–desorption. The organic material in the spent
catalysts was analyzed by organic elemental analysis and
thermogravimetry. The results revealed that in guaiacol HDO at 250 °C
under 30 bar total pressure the main product was cyclohexanol with 36%
yield over Ni/ZrO2 while the total deoxygenation forming cyclohexane was limited to 2%. Ir/ZrO2 exhibited higher HDO activity compared to Ni/ZrO2
giving 14% yield of cyclohexane. Extensive formation of methane and
ethane was also observed in guaiacol HDO. Hydrodeoxygenation of
isoeugenol over Ir/ZrO2 resulted in maximally 33% yield of
propylcyclohexane due to a low liquid phase mass balance. The main
products in vanillin HDO at 100 °C in water was vanillyl alcohol.


Nyckelord

Chemical Engineering

Senast uppdaterad 2019-18-10 vid 02:50