Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/1996
Title: Isomerisation of ?-pinene over Beta zeolites synthesised by different methods
Authors: Gündüz, Gönül
Dimitrova, Raina D.
Yılmaz, Selahattin
Dimitrov, Ljubomir
Spassova, Maya
Yılmaz, Selahattin
Izmir Institute of Technology. Chemical Engineering
Keywords: Acidity
α-Pinene
Beta zeolite
Isomerisation
Mesopores
Issue Date: Jan-2005
Publisher: Elsevier Ltd.
Source: Gündüz, G., Dimitrova, R.D., Yılmaz, S., Dimitrov, L., and Spassova, M. (2005). Isomerisation of α-pinene over Beta zeolites synthesised by different methods. Journal of Molecular Catalysis A: Chemical, 225(2), 253-258. doi:10.1016/j.molcata.2004.09.018
Abstract: Liquid-phase α-pinene isomerisation at l00°C in a batch reactor is studied over Beta zeolites synthesised by different methods. It is confirmed that α-pinene forms a carbenium ion in an acidic environment, which rearranges without capture by nucleophiles, to form mainly hydrocarbons as camphene, terpinenes, terpinolenes and heavy products. The microporous Beta samples show low activity despite the high acidity most probably because of the hindered intermediate formation. The nature of the enhanced activity of Beta mesopores samples is suggested to be a result from the high accessibility of the acidic sites. The isomerisation of α-pinene was studied over Beta zeolites synthesised by different methods. The main products are camphene, terpinenes, terpinolenes and heavy products. Beta zeolites with micro-/mesopores reveal excellent activity because of the appropriate balance between acidity and bimodal pore system. The microporous Beta samples show low activity despite the good total acidity most probably because of the steric effect for the formation of the intermediate cations.
URI: https://doi.org/10.1016/j.molcata.2004.09.018
http://hdl.handle.net/11147/1996
ISSN: 1381-1169
1381-1169
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Sürdürülebilir Yeşil Kampüs Koleksiyonu / Sustainable Green Campus Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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