Journal
APPLIED CATALYSIS A-GENERAL
Volume 445, Issue -, Pages 351-358Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2012.09.002
Keywords
Ruthenium; Citral; Hydrogenation; alpha,beta-Unsaturated alcohol; Organic amine
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Funding
- National Natural Science Foundation of China [21072138]
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A Ru/AlO(OH) catalyst was prepared by co-precipitation and characterised by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), thermo-gravimetry (TG), and Fourier transform infrared spectroscopy (FT-IR). Its catalytic performance was tested in the selective hydrogenation of citral. The results showed that the combination of Ru/AlO(OH) and water obviously improved the catalyst activity and its selectivity to geraniol and nerol. Introducing organic additives increased the hydrophilicity of metal particles, which favoured the adsorption of the citral C=O bond over the adsorption of the conjugated C=C bond, improving the selectivity to and inhibiting the further hydrogenation of geraniol and nerol. The maximum yield of geraniol and nerol (81%) was achieved in water with ethylenediamine as an additive. (C) 2012 Elsevier B.V. All rights reserved.
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