A Study on Characterisation of some Pillared Clays

Central Fuel Research Institute, P.O. FRI. Dhanbad-828 108
Indian School of Mines, Dhanbad-826 004
Manuscript received 10 July 1992, revised 16 March 1993, accepted 14 May 1993

Attempts have been made to characterise pillared clay catalysts by different physicochemical techniques, like MAS NMR spectroscopy, DTA, ammonia TPD and also by measuring the surface-area. Ammonia TPD indicates the generation of strong acid sites on pillaring. The MAS NMR spectra of the clay catalysts reveal that both tetrahedral and octahedral aluminium are present. It is also concluded that during the formation of pillared clays, there is interaction between tetrahedral layer of the clay and the AI-oligomer forming weak bonds.