Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/5765
Title: Effect of different acidity modifications on the activity and selectivity on H-ZSM5 zeolites in n-butene isomerization
Authors: Kılıç, Emre
Yılmaz, Selahattin
Keywords: Acidity
H-ZSM5
Isobutene
Isomerization
Modification
Butenes
Publisher: Springer Verlag
Source: Kılıç, E., and Yılmaz, S. (2014). Effect of different acidity modifications on the activity and selectivity on H-ZSM5 zeolites in n-butene isomerization. Reaction Kinetics, Mechanisms and Catalysis, 112(1), 283-294. doi:10.1007/s11144-014-0681-7
Abstract: H-ZSM-5 was modified by silylation [tetraethylorthosilicate (TEOS) and triaminopropyltriethoxysilane], alkali (NaOH), acid (HCl) and ammoniumhexafluorosilicate (AHFS) treatments. The parent and modified zeolite forms were tested in n-butene isomerization. Modifications affected total acidities, the strength of the acid sites, pore sizes and surface areas of the H-ZSM-5 differently. The modifications decreased the conversion obtained by the parent catalyst. TEOS and alkali modifications did not promote formation of isobutene. Pre-alkali treatment before acid treatment increased selectivity to isobutene from 56.0 to 66.7 %, while conversion changed a little, it dropped from 52 to 50 %. AHFS modification provided the highest enhancement in selectivity to isobutene (87.5 %) for which n-butene conversion was dropped by about 10 % compared to H-ZSM-5. This was attributed to a slight modification of the pore size and to the reduction in strong and weak acid sites and generation of new Lewis acid sites.
URI: http://doi.org/10.1007/s11144-014-0681-7
http://hdl.handle.net/11147/5765
ISSN: 1878-5190
1878-5204
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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