Journal of Porous Materials

, Volume 14, Issue 1, pp 89–96

Aluminum distribution in high-silica mordenite

  • Baowang Lu
  • Takahide Kanai
  • Yasunori Oumi
  • Tsuneji Sano
Article

DOI: 10.1007/s10934-006-9012-3

Cite this article as:
Lu, B., Kanai, T., Oumi, Y. et al. J Porous Mater (2007) 14: 89. doi:10.1007/s10934-006-9012-3

Abstract

The Al distribution in high-silica mordenite (MOR) zeolites with various Si/Al ratios was investigated by FT-IR spectroscopy in the presence of CD3CN probe molecules and benzene adsorption. Two adsorption bands assigned to CN stretching vibration were observed at 2280–2295 and ≈2315 cm−1, which are due to interaction of CN with acidic hydroxyl groups in the main channels and the side pockets of H-MOR zeolite, respectively. The relative intensity of the peak at 2315 cm−1 increased with an increase in the Si/Al ratio, indicating that the proportion of Al atoms in the main channels relatively decreased with the Si/Al ratio. This was confirmed from the linear relationship between the number of benzene molecules adsorbed in a unit cell and the number of Al atoms in the main channels. In addition, this was also suggested from the computer simulation result that Al atoms are preferentially sitting in the T3 site.

Keywords

MordeniteMain channelSide pocketAl distributionAcetonitrile

Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  • Baowang Lu
    • 1
    • 2
  • Takahide Kanai
    • 1
  • Yasunori Oumi
    • 1
  • Tsuneji Sano
    • 1
    • 3
  1. 1.School of Materials ScienceJapan Advanced Institute of Science and TechnologyIshikawaJapan
  2. 2.Molecular Catalysis Group, Research Institute for Innovation in Sustainable ChemistryNational Institute of Advanced Industrial Science and TechnologyIbarakiJapan
  3. 3.Department of Applied Chemistry, Graduate School of EngineeringHiroshima UniversityHiroshimaJapan