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Hydrogenation of citral over nitrogen‐doped carbon nanofibre‐supported nickel catalyst
Author(s) -
Gryglewicz Stanisław,
Śliwak Agata,
Ćwikła Joanna,
Gryglewicz Grażyna
Publication year - 2016
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.22499
Subject(s) - citral , citronellal , catalysis , nickel , selectivity , toluene , carbon fibers , chemistry , nitrogen , nanoparticle , materials science , inorganic chemistry , organic chemistry , nanotechnology , chromatography , composite material , composite number , essential oil
Herringbone carbon nanofibres (hCNFs) and nitrogen‐doped carbon nanofibres with 0.115 g/g (11.5 %) of N (N‐hCNFs) were used as the supports of nickel catalysts in the liquid phase hydrogenation of citral using toluene as a solvent. Over 96 % selectivity to citronellal was obtained at 150 °C for both catalysts. At the reaction temperature of 200 °C, reasonable amounts of isopulegol were formed additionally as a result of citronellal cyclization. The catalytic activity of Ni nanoparticles was significantly improved when supported on CNFs doped with nitrogen. The hydrogenation of cis ‐citral was remarkably favoured over the trans ‐citral isomer regardless of the reaction temperature. The hydrogenation of citronellal under the same process conditions was also studied. The sequential‐parallel reactions network for the hydrogenation of citral under the applied conditions was proposed and the kinetic constants were evaluated, assuming pseudo‐first order kinetics of the hydrogenation process.