Pillared clay studies PILC surface areas

In the case of pillared clays (PILCs), notwithstanding the fact that these materials were initially developed as catalysts, there have also been other investigations, where PILCs have been studied as potential sorbents, especially for gas separation applications. These materials have a developed micropore structure with a relatively large BET surface area, normally between 300 and 400m2/g and a micropore volume around 0.15 cm3/g [154,155],... 

The thermal stabilities of their corresponding pillar intmlayered montmorillonite clay minerals (PILCs) were characterized through the use of powder X-ray diffraction, differential thermal analyses and surface area measurements. These relative stabilities were also found to increase in the order Gaia-PILC < Alia-PILC < GaAl -PlLC. The relative Brdnsted and Lewis acidities of the montmorillonite itself, and of the clay mineral pillared with the different polyoxocations have been examined through infrared pyridine sorption studies. 

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