REDUCED CHARGE Al-PILLARED MONTMORILLONITES: ON THE POSSIBILITY OF CONTROLLING THE PILLAR DENSITY

Year, pages: 2002, 99 - 102

The microporosity of Al-pillared Li-montmorillonites with different layer charges obtained by thermal treatment at different temperatures was studied by nitrogen adsorption/desorption at -196 °C. A correlation was observed between the decreasing sorption capacity of samples derived from lithiated precursors heated at ever increasing temperature and the increasing contribution of the collapsed pyrophyllite-like areas inactive in pillaring. The dominant micropore radius remained below 3.5×10^–1 nm for all pillared samples, showing that, contrary to the common belief, the layer charge reduction by Hofmann-Klemen effect fails to bring about substantial changes in the lateral interpillar distances.

Bahranowski, K., Gawel, A., Kielski, A., Michalik, A., M. Serwicka, E., Wisla-Walsh, E., Wodnicka, K., Zwicky, C. 2002. REDUCED CHARGE Al-PILLARED MONTMORILLONITES: ON THE POSSIBILITY OF CONTROLLING THE PILLAR DENSITY. In Geologica Carpathica, vol. 53, no.2, pp. 99-102. 1335-0552.

Bahranowski, K., Gawel, A., Kielski, A., Michalik, A., M. Serwicka, E., Wisla-Walsh, E., Wodnicka, K., Zwicky, C. (2002). REDUCED CHARGE Al-PILLARED MONTMORILLONITES: ON THE POSSIBILITY OF CONTROLLING THE PILLAR DENSITY. Geologica Carpathica, 53(2), 99-102. 1335-0552.