Barium modification of a high-silica zeolite for methanol conversion to light alkenes

M. M. Abdillahi; U. A. El-Nafaty; A. M. Al-Jarallah

doi:10.1016/0926-860X(92)85174-A

Barium modification of a high-silica zeolite for methanol conversion to light alkenes

M. M. Abdillahi^*
, U. A. El-Nafaty
, A. M. Al-Jarallah

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

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

16 Scopus citations

Abstract

High-silica zeolite (silicalite) was modified with barium resulting in reduced acid strength of the catalyst and better performance when compared with ZSM-5 and fresh silicalite in converting methanol to alkenes. Various concentrations of barium were ion-exchanged and impregnated to achieve the optimum loading of the modifier. The fresh and the modified zeolites were fully characterized by X-ray diffraction, scanning electron microscopy, thermogravimetric analysis, differential thermal analysis, as well as by surface area, chemical and other analyses. Barium silicalite has a lowered coke deposition and an improved active life when ion exchanged. The reverse was observed in the case of impregnation.

Original language	English
Pages (from-to)	1-12
Number of pages	12
Journal	Applied Catalysis A: General
Volume	91
Issue number	1
DOIs	https://doi.org/10.1016/0926-860X(92)85174-A
State	Published - 12 Nov 1992

Bibliographical note

Funding Information:
The authors wish to acknowledge the support of the Research Institute of the King Fahd University of Petroleum and Minerals.

Keywords

SEM
TGA
XRD)
alkenes
barium modification
catalyst characterization (DTA
high silica-zeolite
methanol conversion.

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology

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10.1016/0926-860X(92)85174-A

Cite this

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title = "Barium modification of a high-silica zeolite for methanol conversion to light alkenes",

abstract = "High-silica zeolite (silicalite) was modified with barium resulting in reduced acid strength of the catalyst and better performance when compared with ZSM-5 and fresh silicalite in converting methanol to alkenes. Various concentrations of barium were ion-exchanged and impregnated to achieve the optimum loading of the modifier. The fresh and the modified zeolites were fully characterized by X-ray diffraction, scanning electron microscopy, thermogravimetric analysis, differential thermal analysis, as well as by surface area, chemical and other analyses. Barium silicalite has a lowered coke deposition and an improved active life when ion exchanged. The reverse was observed in the case of impregnation.",

keywords = "SEM, TGA, XRD), alkenes, barium modification, catalyst characterization (DTA, high silica-zeolite, methanol conversion.",

author = "Abdillahi, \{M. M.\} and El-Nafaty, \{U. A.\} and Al-Jarallah, \{A. M.\}",

note = "Funding Information: The authors wish to acknowledge the support of the Research Institute of the King Fahd University of Petroleum and Minerals.",

year = "1992",

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doi = "10.1016/0926-860X(92)85174-A",

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AU - Abdillahi, M. M.

AU - El-Nafaty, U. A.

AU - Al-Jarallah, A. M.

N1 - Funding Information: The authors wish to acknowledge the support of the Research Institute of the King Fahd University of Petroleum and Minerals.

PY - 1992/11/12

Y1 - 1992/11/12

N2 - High-silica zeolite (silicalite) was modified with barium resulting in reduced acid strength of the catalyst and better performance when compared with ZSM-5 and fresh silicalite in converting methanol to alkenes. Various concentrations of barium were ion-exchanged and impregnated to achieve the optimum loading of the modifier. The fresh and the modified zeolites were fully characterized by X-ray diffraction, scanning electron microscopy, thermogravimetric analysis, differential thermal analysis, as well as by surface area, chemical and other analyses. Barium silicalite has a lowered coke deposition and an improved active life when ion exchanged. The reverse was observed in the case of impregnation.

AB - High-silica zeolite (silicalite) was modified with barium resulting in reduced acid strength of the catalyst and better performance when compared with ZSM-5 and fresh silicalite in converting methanol to alkenes. Various concentrations of barium were ion-exchanged and impregnated to achieve the optimum loading of the modifier. The fresh and the modified zeolites were fully characterized by X-ray diffraction, scanning electron microscopy, thermogravimetric analysis, differential thermal analysis, as well as by surface area, chemical and other analyses. Barium silicalite has a lowered coke deposition and an improved active life when ion exchanged. The reverse was observed in the case of impregnation.

KW - SEM

KW - TGA

KW - XRD)

KW - alkenes

KW - barium modification

KW - catalyst characterization (DTA

KW - high silica-zeolite

KW - methanol conversion.

UR - https://www.scopus.com/pages/publications/0026954558

U2 - 10.1016/0926-860X(92)85174-A

DO - 10.1016/0926-860X(92)85174-A

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VL - 91

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EP - 12

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

IS - 1

ER -

Barium modification of a high-silica zeolite for methanol conversion to light alkenes

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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