Paper Title:
Thermal and Hydrothermal Stability of Al-Pillared Rectorites
  Abstract

Al-pillared rectorites (Al-REC) were synthesized from naturally occurring rectorite through exchange of interlamellar ions with hydroxyalumina polycations. Furthermore, Powder X-ray diffraction (XRD), Nitrogen adsorption-desorption isotherms, and Transmitting electronic microscopy (TEM) were applied in order to study the themal stability and hydrothermal stability of pillared materials. The Al-REC are thermally stable up to 800 °C. X-ray diffractograms of Al-REC calcined at 800 °C show a sharp and intense d001 peak, corresponding to a basal spacing of 2.75nm. In a 100% steam flow under atmospheric pressure at 800 °C for 20h, the characteristic d001 spacing of Al-REC decreases from 2.74 to 2.52nm, the sharp and intense d001 peak is still observed. And micropore area, mesopore volume and micropore volume retain 62, 33 and 67%, respectively, which affirms that this pillared clay has exceptional hydrothermal stability.

  Info
Periodical
Edited by
Jinsheng Liang and Lijuan Wang
Pages
314-317
DOI
10.4028/www.scientific.net/AMR.178.314
Citation
H. Y. Xu, X. T. Chen, A. H. Guo, "Thermal and Hydrothermal Stability of Al-Pillared Rectorites", Advanced Materials Research, Vol. 178, pp. 314-317, 2011
Online since
December 2010
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