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.
PDF
Rare_earth_exchanged_(Ce3+,_La3+_and_RE3+)_H–Y_zeolites_as_solid_acid_catalysts.pdf Restricted to Registered users only Download (253kB) | Request a copy |
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 |
---|---|
Publication: | Microporous and Mesoporous Materials |
Publisher: | Elsevier |
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.ac.in/id/eprint/14066 |
Actions (login required)
View Item |