Chemistry / Kimya

Permanent URI for this collectionhttps://hdl.handle.net/11147/4072

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2005 - 200912010 - 20191

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Department: search.filters.department.İzmir Institute of Technology. Chemical EngineeringSubject: search.filters.subject.Clinoptilolite

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Now showing 1 - 2 of 2
  • Article
    Citation - WoS: 6
    Citation - Scopus: 6
    Esterification of 1-Octanol on Clinoptilolite-Supported Tio2 Catalysts
    (Springer Verlag, 2019) Özyağcı, Bensu; Şahin, Volkan; Karabakan, Abdulkerim; 01. Izmir Institute of Technology
    In this study, a natural type of zeolite, Clinoptilolite (CLI), is used as a support for TiO2. First, TiO2-supported heterogeneous catalysts originated from the high temperature calcination of TiCl4 groups, which were thermally immobilized on clinoptilolite, were obtained. Powder-XRD and EDX analyzes showed that the oxide form of Ti-immobilized on dealuminated clinoptilolite were formed in the anatase phase, and the zeolite structure was preserved. As seen in TGA/DTA analyzes, this catalyst could be efficient and have high stability for many reactions. Second, the esterification reaction of 1-octanol with acetic acid is used as a reference reaction for this catalyst.
  • Article
    Citation - WoS: 36
    Citation - Scopus: 40
    The Kinetics of Citral Hydrogenation Over Pd Supported on Clinoptilolite Rich Natural Zeolite
    (Elsevier Ltd., 2005) Yılmaz, Selahattin; Uçar, Şule; Yılmaz, Selahattin; Güleç, Hilal; Artok, Levent; 03.02. Department of Chemical Engineering; 04.01. Department of Chemistry; 03. Faculty of Engineering; 04. Faculty of Science; 01. Izmir Institute of Technology
    The liquid phase hydrogenation of citral has been investigated over Pd (2.42%) supported on clinoptilolite rich natural zeolite catalyst for different reaction conditions. The zeolite support did not affect the active metal properties. This was attributed to the large size of Pd particles on the support. High selectivity (90%) to citronellal was obtained at complete conversion of citral. The catalytic activity increased with reaction temperature (80, 100, 120°C) following an Arrhenius behaviour, while selectivity remained constant for a given conversion. Selectivity to citronellal increased from 78 to 90% with increase in the amount of catalyst in the reaction solution (Citral/Pd mole ratio 293, 176 and 105). The spent catalyst regained its fresh activity and selectivity upon regeneration.