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|Title:||Benzene hydrogenation over ni/ai2O3 catalysts prepared by conventional and sol-gel techniques||Authors:||Goundani, Katerina
Savva, Petros G.
|Keywords:||Aerogels;Gasoline;Hydrogenation||Issue Date:||2008||Publisher:||Elsevier||Source:||Applied Catalysis B: Environmental, 2008, Volume 79, Issue 3,Pages 199-207||Abstract:||Nickel supported on alumina catalysts have been prepared using various synthesis methods (dry impregnation, co-precipitation, sol-gel) and evaluated for the hydrogenation of benzene contained in gasoline. The evaluation was carried out in a laboratory scale high pressure fixed bed reactor fed with a stream of surrogated reformate gasoline consisted by a mixture of hexane, benzene and toluene. All catalysts have been characterized by the joint use of various physicochemical characterization methods (XRF, BET, TGA, SEM, XRD, UV-vis DRS and XPS) in order to correlate their catalytic performances to their physicochemical properties. The results obtained revealed that sol-gel procedure, especially when it is followed by supercritical drying (aerogel), produced the most promising catalysts for the aforementioned catalytic process. Sol-gel methodology ensured the best compromise between dispersion of the nickel phase and its interaction with the support surface. Co-precipitated catalysts exhibited important activities but lower than those of the sol-gel catalysts. The catalyst prepared by dry impregnation proved to be the less active. Calcination of the catalysts before their activation by reduction decreased their activities.||URI:||http://ktisis.cut.ac.cy/handle/10488/6602||ISSN:||09263373||DOI:||http://dx.doi.org/10.1016/j.apcatb.2007.10.023||Rights:||© 2008 Elsevier B.V. All rights reserved||Type:||Article|
|Appears in Collections:||Άρθρα/Articles|
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