Interaction of H 2O and NO 2 with BaY faujasite: Complex contraction/expansion behavior of the zeolite unit cell

Xianqin Wang, Jonathan C. Hanson, János Szanyi, José A. Rodriguez

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20 Scopus citations

Abstract

In situ time-resolved X-ray diffraction in combination with the Rietveld method was used to study the contraction/expansion behavior of a BaY faujasite zeolite during dehydration and NO 2 adsorption/desorption reactions. The adsorption of water and NO 2 molecules induced a significant contraction of the zeolite unit cell. The unexpected contraction of the unit cell was closely related to the amount of water and NO x species (NO +, NO 2, NO 3 -) inside the framework. The reaction H 2O + NO 2 → NO 3 - + H + had a substantial effect on the structural properties of the BaY system. The NO 3 - groups produced a shift in the position of the Ba cations and a reduction in the zeolite unit cell.

Original languageEnglish (US)
Pages (from-to)16613-16616
Number of pages4
JournalJournal of Physical Chemistry B
Volume108
Issue number43
DOIs
StatePublished - Oct 28 2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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