Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/2356
Title: Hydrogenation of citral over Ni and Ni-Sn catalysts
Authors: Aykaç, Hilal
Yılmaz, Selahattin
Aykaç, Hilal
Yılmaz, Selahattin
Izmir Institute of Technology. Chemical Engineering
Keywords: Citral
Citronellal
Hydrogenation
Zeolites
Issue Date: Oct-2008
Publisher: TUBITAK
Source: Aykaç, H., and Yılmaz, S. (2008). Hydrogenation of citral over Ni and Ni-Sn catalysts. Turkish Journal of Chemistry, 32(5), 623-633.
Abstract: Liquid phase citral hydrogenation over zeolite-supported monometallic Ni and bimetallic Ni-Sn catalysts was studied. The zeolite support materials were Na-Y, Na-mordenite, and clinoptilolite. Ni and Sn contents of the monometallic and bimetallic catalysts were 8.1-9.2 wt% and 0.46 wt%, respectively. The type of the zeolite support affected the activity and selectivity of the catalysts differently. The main product of the citral hydrogenation reaction was citronellal, for both monometallic (84.5% yield) and bimetallic (44.5% yield) catalysts. The addition of promoter increased the selectivity to unsaturated alcohols (geraniol+nerol), i.e. it changed from 0.9% to 6.3% over mordenite and from 0.9% to 2.1% over Na-Y-supported catalysts. Furthermore, activity of the Ni catalysts decreased while the quantity of acetal remained almost constant. Intimate contact between active metal, promoter, and support, and a catalyst with a high concentration of weak acid sites gave high selectivity to geraniol+nerol.
URI: http://hdl.handle.net/11147/2356
ISSN: 1300-0527
1300-0527
1303-6130
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
TR Dizin İndeksli Yayınlar / TR Dizin Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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