Comparison of activity and selectivity of SSZ-33 based catalyst with other zeolites in toluene disproportionation

S. Al-Khattaf; Z. Musilová-Pavlačková; M. A. Ali; J. Čejka

doi:10.1007/s11244-008-9150-8

Comparison of activity and selectivity of SSZ-33 based catalyst with other zeolites in toluene disproportionation

S. Al-Khattaf, Z. Musilová-Pavlačková, M. A. Ali, J. Čejka^*

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

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

26 Scopus citations

Abstract

SSZ-33 based-catalyst, after modification with Mo and alumina binder, was evaluated in long-run tests in the toluene disproportionation in the presence of hydrogen aŠcarrier gas. The activity and selectivity of this catalyst were compared with those of ZSM-5 and mesoporous ZSM-5 prepared with the same concentration of Mo and alumina. Formation of the final catalysts decreased the void volume of micropores in order SSZ-33>ZSM-5>ZSM- 5/Meso. Simultaneously, the concentration of Lewis acid sites increased due to the addition of alumina to the catalyst. The highest toluene conversion was achieved with SSZ-33 catalyst comprising 12-12-10-ring channels, which is the result of high acidity of this zeolite together with increased mass transport through large pores. ZSM-5 zeolite exhibited lower toluene conversion while only a low activity was found for mesoporous ZSM-5 probably due to the limitations of the access to the zeolite channels after modification with alumina.

Original language	English
Pages (from-to)	140-147
Number of pages	8
Journal	Topics in Catalysis
Volume	52
Issue number	1-2
DOIs	https://doi.org/10.1007/s11244-008-9150-8
State	Published - Mar 2009

Bibliographical note

Funding Information:
Acknowledgement The authors thank Dr. S. I. Zones (Chevron) for providing SSZ-33 zeolite and supporting this work. The Support provided by The Center of Research Excellence in Petroleum Refining and Petrochemicals at King Fahd University of Petroleum and Minerals (KFUPM) is appreciated. J. Cˇ ejka was supported by the Academy of Sciences of the Czech Republic (1QS400400560) while Z. Musilová-Pavlacˇková thanks the Grant Agency of the Czech Republic (203/08/H032) and Dr. L. Brabec for recording the SEM images.

Keywords

Mesoporous ZSM-5
Molybdenum
Reaction temperature
SSZ-33
Toluene disproportionation
ZSM-5

ASJC Scopus subject areas

Catalysis
General Chemistry

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10.1007/s11244-008-9150-8

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title = "Comparison of activity and selectivity of SSZ-33 based catalyst with other zeolites in toluene disproportionation",

abstract = "SSZ-33 based-catalyst, after modification with Mo and alumina binder, was evaluated in long-run tests in the toluene disproportionation in the presence of hydrogen a{\v S}carrier gas. The activity and selectivity of this catalyst were compared with those of ZSM-5 and mesoporous ZSM-5 prepared with the same concentration of Mo and alumina. Formation of the final catalysts decreased the void volume of micropores in order SSZ-33>ZSM-5>ZSM- 5/Meso. Simultaneously, the concentration of Lewis acid sites increased due to the addition of alumina to the catalyst. The highest toluene conversion was achieved with SSZ-33 catalyst comprising 12-12-10-ring channels, which is the result of high acidity of this zeolite together with increased mass transport through large pores. ZSM-5 zeolite exhibited lower toluene conversion while only a low activity was found for mesoporous ZSM-5 probably due to the limitations of the access to the zeolite channels after modification with alumina.",

keywords = "Mesoporous ZSM-5, Molybdenum, Reaction temperature, SSZ-33, Toluene disproportionation, ZSM-5",

author = "S. Al-Khattaf and Z. Musilov{\'a}-Pavla{\v c}kov{\'a} and Ali, {M. A.} and J. {\v C}ejka",

note = "Funding Information: Acknowledgement The authors thank Dr. S. I. Zones (Chevron) for providing SSZ-33 zeolite and supporting this work. The Support provided by The Center of Research Excellence in Petroleum Refining and Petrochemicals at King Fahd University of Petroleum and Minerals (KFUPM) is appreciated. J. Cˇ ejka was supported by the Academy of Sciences of the Czech Republic (1QS400400560) while Z. Musilov{\'a}-Pavlacˇkov{\'a} thanks the Grant Agency of the Czech Republic (203/08/H032) and Dr. L. Brabec for recording the SEM images.",

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doi = "10.1007/s11244-008-9150-8",

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AU - Al-Khattaf, S.

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AU - Ali, M. A.

AU - Čejka, J.

N1 - Funding Information: Acknowledgement The authors thank Dr. S. I. Zones (Chevron) for providing SSZ-33 zeolite and supporting this work. The Support provided by The Center of Research Excellence in Petroleum Refining and Petrochemicals at King Fahd University of Petroleum and Minerals (KFUPM) is appreciated. J. Cˇ ejka was supported by the Academy of Sciences of the Czech Republic (1QS400400560) while Z. Musilová-Pavlacˇková thanks the Grant Agency of the Czech Republic (203/08/H032) and Dr. L. Brabec for recording the SEM images.

PY - 2009/3

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N2 - SSZ-33 based-catalyst, after modification with Mo and alumina binder, was evaluated in long-run tests in the toluene disproportionation in the presence of hydrogen aŠcarrier gas. The activity and selectivity of this catalyst were compared with those of ZSM-5 and mesoporous ZSM-5 prepared with the same concentration of Mo and alumina. Formation of the final catalysts decreased the void volume of micropores in order SSZ-33>ZSM-5>ZSM- 5/Meso. Simultaneously, the concentration of Lewis acid sites increased due to the addition of alumina to the catalyst. The highest toluene conversion was achieved with SSZ-33 catalyst comprising 12-12-10-ring channels, which is the result of high acidity of this zeolite together with increased mass transport through large pores. ZSM-5 zeolite exhibited lower toluene conversion while only a low activity was found for mesoporous ZSM-5 probably due to the limitations of the access to the zeolite channels after modification with alumina.

AB - SSZ-33 based-catalyst, after modification with Mo and alumina binder, was evaluated in long-run tests in the toluene disproportionation in the presence of hydrogen aŠcarrier gas. The activity and selectivity of this catalyst were compared with those of ZSM-5 and mesoporous ZSM-5 prepared with the same concentration of Mo and alumina. Formation of the final catalysts decreased the void volume of micropores in order SSZ-33>ZSM-5>ZSM- 5/Meso. Simultaneously, the concentration of Lewis acid sites increased due to the addition of alumina to the catalyst. The highest toluene conversion was achieved with SSZ-33 catalyst comprising 12-12-10-ring channels, which is the result of high acidity of this zeolite together with increased mass transport through large pores. ZSM-5 zeolite exhibited lower toluene conversion while only a low activity was found for mesoporous ZSM-5 probably due to the limitations of the access to the zeolite channels after modification with alumina.

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Comparison of activity and selectivity of SSZ-33 based catalyst with other zeolites in toluene disproportionation

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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