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Enhancing the mesoporosity of pillared clay catalyst - a study of pillar aggregates and deactivation in alkylation reaction

Selvaraj, S and Mohan, BV and Krishna, KN and Prakash, Jai BS (1998) Enhancing the mesoporosity of pillared clay catalyst - a study of pillar aggregates and deactivation in alkylation reaction. In: Studies in Surface Science and Catalysis, 113 . pp. 573-578.

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Official URL: http://dx.doi.org/10.1016/S0167-2991(98)80333-9

Abstract

A sample of montmorillonite was pillared with aluminium polyoxycations in presence of different amounts of tween-80, a nonionic surfactant, ranging from 0.01 to 0.20 mmol/meq of clay. The amount of aluminium sorbed was found to vary with the amount of surfactant added during pillaring. Vapour phase catalytic activity of the samples for alkylation of toluene with methanol in a fixed bed down flow reactor showed that the rate of deactivation, in general, increased with decrease in the pillar density. The samples treated with 0.06 to 0.08 mmol/meq of surfactant showed the lowest deactivation and also an enhancement in the mesopores which did not change on calcining to 540°C. Suppression of deactivation is attributed to the distribution of pillars by the surfactant in such a way as to decrease the coke formation.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier science.
Keywords: Montmorillonite;Aluminum;Zeolites.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 09 Jun 2011 07:25
Last Modified: 09 Jun 2011 07:25
URI: http://eprints.iisc.ernet.in/id/eprint/38111

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