The stability of H-MCM-22 under severe thermal conditions

H. O. Pastore; E. C. Oliveira; A. Frache; S. R. Dutra; E. Boccaleri; L. Marchese

doi:10.1016/s0167-2991(04)80660-8

The stability of H-MCM-22 under severe thermal conditions

H. O. Pastore
, E. C. Oliveira
, A. Frache
, S. R. Dutra
, E. Boccaleri
, L. Marchese

Research output: Contribution to journal › Article › peer-review

Abstract

This study shows that the MWW structure is more stable than previously known zeolites. Structural, thermal and spectroscopic analyses have shown that acid MCM-22 zeolite is stable up to 1373K under vacuum and to 1473K in air. The Brönsted hydroxyl groups withstand temperatures up to 1173K. At 1473K there is a phase transition from the MWW structure into α-cristobalite when the sample is under vacuum while for the sample treated in air only a small fraction of the total is transformed to α-cristobalite at 1473K.

Original language	English
Pages (from-to)	1426-1430
Number of pages	5
Journal	Studies in Surface Science and Catalysis
Volume	154 B
DOIs	https://doi.org/10.1016/s0167-2991(04)80660-8
Publication status	Published - 2004

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title = "The stability of H-MCM-22 under severe thermal conditions",

abstract = "This study shows that the MWW structure is more stable than previously known zeolites. Structural, thermal and spectroscopic analyses have shown that acid MCM-22 zeolite is stable up to 1373K under vacuum and to 1473K in air. The Br{\"o}nsted hydroxyl groups withstand temperatures up to 1173K. At 1473K there is a phase transition from the MWW structure into α-cristobalite when the sample is under vacuum while for the sample treated in air only a small fraction of the total is transformed to α-cristobalite at 1473K.",

author = "Pastore, \{H. O.\} and Oliveira, \{E. C.\} and A. Frache and Dutra, \{S. R.\} and E. Boccaleri and L. Marchese",

note = "Funding Information: This work was funded by the Italian MURST ({"}PRIN, Cofm2000{"}) and the Brazilian FAPESP ({"}Funda9ao e Amparo a Pesquisa no Estado de Sao Paulo{"}). Juliette Muller and ARL company are acknowledged for the assistance in obtaining high temperature XRD diffractograms.",

year = "2004",

doi = "10.1016/s0167-2991(04)80660-8",

language = "English",

volume = "154 B",

pages = "1426--1430",

journal = "Studies in Surface Science and Catalysis",

issn = "0167-2991",

publisher = "Elsevier Inc.",

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TY - JOUR

T1 - The stability of H-MCM-22 under severe thermal conditions

AU - Pastore, H. O.

AU - Oliveira, E. C.

AU - Frache, A.

AU - Dutra, S. R.

AU - Boccaleri, E.

AU - Marchese, L.

N1 - Funding Information: This work was funded by the Italian MURST ("PRIN, Cofm2000") and the Brazilian FAPESP ("Funda9ao e Amparo a Pesquisa no Estado de Sao Paulo"). Juliette Muller and ARL company are acknowledged for the assistance in obtaining high temperature XRD diffractograms.

PY - 2004

Y1 - 2004

N2 - This study shows that the MWW structure is more stable than previously known zeolites. Structural, thermal and spectroscopic analyses have shown that acid MCM-22 zeolite is stable up to 1373K under vacuum and to 1473K in air. The Brönsted hydroxyl groups withstand temperatures up to 1173K. At 1473K there is a phase transition from the MWW structure into α-cristobalite when the sample is under vacuum while for the sample treated in air only a small fraction of the total is transformed to α-cristobalite at 1473K.

AB - This study shows that the MWW structure is more stable than previously known zeolites. Structural, thermal and spectroscopic analyses have shown that acid MCM-22 zeolite is stable up to 1373K under vacuum and to 1473K in air. The Brönsted hydroxyl groups withstand temperatures up to 1173K. At 1473K there is a phase transition from the MWW structure into α-cristobalite when the sample is under vacuum while for the sample treated in air only a small fraction of the total is transformed to α-cristobalite at 1473K.

UR - https://www.scopus.com/pages/publications/11844254740

U2 - 10.1016/s0167-2991(04)80660-8

DO - 10.1016/s0167-2991(04)80660-8

M3 - Article

AN - SCOPUS:11844254740

SN - 0167-2991

VL - 154 B

SP - 1426

EP - 1430

JO - Studies in Surface Science and Catalysis

JF - Studies in Surface Science and Catalysis

ER -

The stability of H-MCM-22 under severe thermal conditions

Abstract

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