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Alteration of aluminum pillared clays for enhanced catalytic activity
Zeolites and Microporous Crystals • 1994
Publication Information
Authors
A. Clearfield, H.M. Aly, R.A. Cahill, G.P.D. Serrette, W.-L. Shea and T.-Y.
Yen
Keywords
Not Available
Journal
Zeolites and Microporous Crystals
Publisher
Elsevier
Volume
Not Available
Issue
Not Available
Pages
433-442
publication.type
International
Paper Link
Not Available
Supplementary Materials
Not Available
Abstract
Saponite and Montmorillonite AI13 pillared clays were subjected to heat treatments up to
750°C. The pillars were found to rehydrate and exhibit enhanced cation and anion exchange
capacities. Treatment of the pillared clays with dilute HCI solubilized increased amounts of
aluminum accompanied by an increase in surface area and pore size. Treatment of the pillared
clays with sulfate or phosphate ion increased the number of Bronsted and Lewis acid sites. 27Al
solid-state NMR spectra indicated formation of a "tAlz03 type structure for the pillars.
750°C. The pillars were found to rehydrate and exhibit enhanced cation and anion exchange
capacities. Treatment of the pillared clays with dilute HCI solubilized increased amounts of
aluminum accompanied by an increase in surface area and pore size. Treatment of the pillared
clays with sulfate or phosphate ion increased the number of Bronsted and Lewis acid sites. 27Al
solid-state NMR spectra indicated formation of a "tAlz03 type structure for the pillars.