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

doi:10.1021/jp046242t

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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23 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 language	English (US)
Pages (from-to)	16613-16616
Number of pages	4
Journal	Journal of Physical Chemistry B
Volume	108
Issue number	43
DOIs	https://doi.org/10.1021/jp046242t
State	Published - Oct 28 2004
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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

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.",

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T1 - Interaction of H 2O and NO 2 with BaY faujasite

T2 - Complex contraction/expansion behavior of the zeolite unit cell

AU - Wang, Xianqin

AU - Hanson, Jonathan C.

AU - Szanyi, János

AU - Rodriguez, José A.

PY - 2004/10/28

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AB - 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.

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

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