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A study of the selective hydroconversion of biocarboxylic acids to bioalcohols over novel indium–nickel/zeolite catalysts using octanoic acid as model reactant

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Abstract

Octanoic acid (OA) was hydrotreated in a flow-through reactor at 21 bar total pressure and 240–340 °C over supported metal catalysts prepared from Ni-zeolites (A, X, P) by indium modification. The Ni-zeolites were activated first in H2 flow at 21 bar and 450 °C. While a fraction of the nickel got fully reduced, the zeolite structure became partially destructed. However, some nickel cations remained unreduced, therefore a large fraction of the crystalline zeolite structure was retained. The indium modification of the reduced Ni-zeolites generated bimetallic NiIn/Ni,H-zeolite catalysts having higher stability, hydroconversion activity, octanol selectivity, and lower hydrodecarbonylation activity than the parent partially destructed Ni-zeolite and the Adkins-type catalysts, commercially applied for the conversion of fatty acids to alcohols.

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Acknowledgments

The authors wish to express their appreciation to Mrs. Ágnes Farkas Wellisch for her technical assistance. Thanks is due to the Hungary-Slovakia Cross-border Co-operation Programme (Project Registration Number: HUSK/1101/1.2.1/0318) for supporting this research.

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Correspondence to Szabolcs Harnos.

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Harnos, S., Onyestyák, G., Klébert, S. et al. A study of the selective hydroconversion of biocarboxylic acids to bioalcohols over novel indium–nickel/zeolite catalysts using octanoic acid as model reactant. Reac Kinet Mech Cat 110, 53–62 (2013). https://doi.org/10.1007/s11144-013-0584-z

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  • DOI: https://doi.org/10.1007/s11144-013-0584-z

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