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Rare earth exchanged $(Ce^{3+}, La^{3+} and RE^{3+})$ H–Y zeolites as solid acid catalysts for the synthesis of linear alkyl benzenes

Thomas, Bejoy and Das, Bibhuti B and Sugunan, S (2006) Rare earth exchanged $(Ce^{3+}, La^{3+} and RE^{3+})$ H–Y zeolites as solid acid catalysts for the synthesis of linear alkyl benzenes. In: Microporous and Mesoporous Materials, 95 (1-3). pp. 329-338.

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Abstract

Rare earth exchanged H–Y zeolites were prepared by simple ion exchange methods at 353 K and have been characterized using different physicochemical techniques. A strong peak around 58 ppm in the $^{27}Al{^1 H}$ MAS NMR spectra of these zeolites suggests a tetrahedral coordination for the framework aluminium. Small peak at or near 0 ppm is due to hexa-coordinated extra-framework aluminium and a shoulder peak near 30 ppm is a penta-coordinated aluminium species; $[Al(OH)_4]^- $. The vapor-phase benzene alkylation with 1-decene and 1-dodecene was investigated with these catalytic systems. Under the reaction conditions of 448 K, benzene/olefin molar ratio of 20 and time on stream 3 h, the most efficient catalyst was CeH–Y which showed more than 70 \% of olefin conversion with 48.5 \% 2-phenyldecane and 46.8 \%, 2-phenyldodecane selectivities with 1-decene and 1-dodecene respectively.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier.
Keywords: Benzene alkylation;Linear alkyl benzenes;Magic angle-spinning NMR;Rare earth exchanged H–Y zeolites;Solid acid catalysts
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 28 May 2008
Last Modified: 19 Sep 2010 04:45
URI: http://eprints.iisc.ernet.in/id/eprint/14066

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