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Please use this identifier to cite or link to this item: http://purl.org/purl/2314

Title: Influence of residual cations (Na+, K+ and Mg2+) in the alkylation activity of benzene with 1-octene over rare earth metal ion exchanged FAU–Y zeolite
Authors: Bejoy, Thomas
Sugunan, S
Keywords: Rare earth exchanged faujasite–Y zeolite
Magic angle spinning NMR
Hirschler–Plank mechanism
Migration behavior
Linear alkylation benzene
Deactivation studies
Issue Date: 2004
Publisher: Elsevier
Abstract: The effect of residual cations in rare earth metal modified faujasite–Y zeolite has been monitored using magic angle spinning NMR spectral analysis and catalytic activity studies. The second metal ions being used are Na+, K+ and Mg+. From a comparison of the spectra of different samples, it is concluded that potassium and magnesium exchange causes a greater downfield shift in the 29Si NMR peaks. Also, lanthanum exchanged samples show migration behavior from large cages to small cages, which causes the redistribution of second counter cations. It is also observed that Mg2+ causes the most effective migration of lanthanum ions due to its greater charge. The prepared systems were effectively employed for the alkylation of benzene with 1-octene in the vapor phase. From the deactivation studies it is observed that the as-exchanged zeolites possess better stability towards reaction condition over the pure HFAU zeolite.
URI: http://dyuthi.cusat.ac.in/purl/2314
ISSN: 1387-1811
Appears in Collections:Dr. Sugunan S

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