I.r. spectroscopy of single zeolite crystals. Part 1: Thermal decomposition of the template in MFI-type materials

Michael Nowotny; Johannes A. Lercher; Henri Kessler

doi:10.1016/S0144-2449(05)80117-4

I.r. spectroscopy of single zeolite crystals. Part 1: Thermal decomposition of the template in MFI-type materials

Michael Nowotny
, Johannes A. Lercher
, Henri Kessler

Technical University of Vienna
Ecole Nationale Supérieure de Chimie

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

53 Scopus citations

Abstract

The thermal decomposition of tetrapropylammonium fluorides in ZSM-5 crystals was studied by means of time resolved i.r. spectroscopy. For the first time, in situ transmission measuresments on single crystals are reported. Three different processes have been observed, i.e., increasing of the mobility of the tetrapropylammonium cations and oligomerization of the template or parts of the template, and decomposition of the template via two different mechanisms. The rate-determining step for the decomposition is the reaction producing the dipropylamine or a dipropylammonium ion. The weight of the ionic or nonionic mechanism in the decomposition of the template is strictly dependent upon the aluminum concentration in the zeolite.

Original language	English
Pages (from-to)	454-459
Number of pages	6
Journal	Zeolites
Volume	11
Issue number	5
DOIs	https://doi.org/10.1016/S0144-2449(05)80117-4
State	Published - Jun 1991
Externally published	Yes

Keywords

Template decomposition in HZSM-5
i.r. microscopy
zeolite single crystals

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10.1016/S0144-2449(05)80117-4

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title = "I.r. spectroscopy of single zeolite crystals. Part 1: Thermal decomposition of the template in MFI-type materials",

abstract = "The thermal decomposition of tetrapropylammonium fluorides in ZSM-5 crystals was studied by means of time resolved i.r. spectroscopy. For the first time, in situ transmission measuresments on single crystals are reported. Three different processes have been observed, i.e., increasing of the mobility of the tetrapropylammonium cations and oligomerization of the template or parts of the template, and decomposition of the template via two different mechanisms. The rate-determining step for the decomposition is the reaction producing the dipropylamine or a dipropylammonium ion. The weight of the ionic or nonionic mechanism in the decomposition of the template is strictly dependent upon the aluminum concentration in the zeolite.",

keywords = "Template decomposition in HZSM-5, i.r. microscopy, zeolite single crystals",

author = "Michael Nowotny and Lercher, \{Johannes A.\} and Henri Kessler",

note = "Funding Information: Miss A.C. Faust is acknowledged for the synthesis of the samples and Dr. M. Soulard for fruitful discussions. This work was supported by the “Fonds zur Fiirderung der wissenschaftlichen Forschung” under project CHE 7312.",

year = "1991",

month = jun,

doi = "10.1016/S0144-2449(05)80117-4",

language = "English",

volume = "11",

pages = "454--459",

journal = "Zeolites",

issn = "0144-2449",

publisher = "Elsevier B.V.",

number = "5",

}

TY - JOUR

T1 - I.r. spectroscopy of single zeolite crystals. Part 1

T2 - Thermal decomposition of the template in MFI-type materials

AU - Nowotny, Michael

AU - Lercher, Johannes A.

AU - Kessler, Henri

N1 - Funding Information: Miss A.C. Faust is acknowledged for the synthesis of the samples and Dr. M. Soulard for fruitful discussions. This work was supported by the “Fonds zur Fiirderung der wissenschaftlichen Forschung” under project CHE 7312.

PY - 1991/6

Y1 - 1991/6

N2 - The thermal decomposition of tetrapropylammonium fluorides in ZSM-5 crystals was studied by means of time resolved i.r. spectroscopy. For the first time, in situ transmission measuresments on single crystals are reported. Three different processes have been observed, i.e., increasing of the mobility of the tetrapropylammonium cations and oligomerization of the template or parts of the template, and decomposition of the template via two different mechanisms. The rate-determining step for the decomposition is the reaction producing the dipropylamine or a dipropylammonium ion. The weight of the ionic or nonionic mechanism in the decomposition of the template is strictly dependent upon the aluminum concentration in the zeolite.

AB - The thermal decomposition of tetrapropylammonium fluorides in ZSM-5 crystals was studied by means of time resolved i.r. spectroscopy. For the first time, in situ transmission measuresments on single crystals are reported. Three different processes have been observed, i.e., increasing of the mobility of the tetrapropylammonium cations and oligomerization of the template or parts of the template, and decomposition of the template via two different mechanisms. The rate-determining step for the decomposition is the reaction producing the dipropylamine or a dipropylammonium ion. The weight of the ionic or nonionic mechanism in the decomposition of the template is strictly dependent upon the aluminum concentration in the zeolite.

KW - Template decomposition in HZSM-5

KW - i.r. microscopy

KW - zeolite single crystals

UR - https://www.scopus.com/pages/publications/0026169606

U2 - 10.1016/S0144-2449(05)80117-4

DO - 10.1016/S0144-2449(05)80117-4

M3 - Article

AN - SCOPUS:0026169606

SN - 0144-2449

VL - 11

SP - 454

EP - 459

JO - Zeolites

JF - Zeolites

IS - 5

ER -

I.r. spectroscopy of single zeolite crystals. Part 1: Thermal decomposition of the template in MFI-type materials

Abstract

Keywords

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