Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/2512
Title: HZSM-5 and H-ferrierite acidity modification by silylation and their activities in n-butene isomerisation
Authors: Kılıç, Emre
Yılmaz, Selahattin
Keywords: Chemical modification
Ferrierite
HZSM-5
Chemical liquid deposition
Silylations
Issue Date: 2010
Publisher: Walter de Gruyter GmbH
Source: Kılıç, E., and Yılmaz, S. (2010). HZSM-5 and H-ferrierite acidity modification by silylation and their activities in n-butene isomerisation. International Journal of Chemical Reactor Engineering, 8.
Abstract: H-ZSM5 and H-Ferrierite acidities were modified by chemical liquid deposition using tetraethylorthosilicate (TEOS), silicontetratchloride (SiCl4) and triaminopropyltriethoxysilane (3-APTES). All depositions were carried out at room temperature for deposition times of 0.5 and 1 h. Reaction tests were performed in a tubular quartz fixed bed reactor at 375°C for weight hour space velocities of 22 h-1. Surface area and pore volume of the catalysts were decreased upon modifications. The least modification of acidity was achieved by TEOS. However, SiCl4 and 3-APTES deposition modification strongly decreased the number of Bronsted and Lewis acid sites. As the effect of the modification increased, total acidity of the SiCl4 modified catalyst decreased. The catalysts were tested in isomerization of n-butene. Modification decreased the activity of the catalysts, but improvement in selectivity was observed with TEOS deposition. TEOS deposition increased the selectivity of the catalysts; for synthesized H-ZSM5 from 57.95 to 63.74 percent, for commercial H-ZSM5-C from 26.78 to 32.52 percent, and for H-FER from 63.06 to 81.23 percent. However, modification with SiCl4 and 3-APTES decreased both conversion and selectivity of the parent catalysts.
URI: http://hdl.handle.net/11147/2512
ISSN: 1542-6580
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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