Comparison studies of xylene isomerization and disproportionation reactions between SSZ-33, TNU-9, mordenite and ZSM-5 zeolite catalysts

Nasiru M. Tukur; Sulaiman Al-Khattaf

doi:10.1016/j.cej.2010.11.004

Comparison studies of xylene isomerization and disproportionation reactions between SSZ-33, TNU-9, mordenite and ZSM-5 zeolite catalysts

Nasiru M. Tukur
, Sulaiman Al-Khattaf^*

^*Corresponding author for this work

King Fahd University of Petroleum & Minerals

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

60 Scopus citations

Abstract

m-Xylene isomerization and disproportionation kinetics have been studied over four zeolite catalysts (ZSM-5, mordenite, SSZ-33 and TNU-9) in a riser simulator reactor over the temperature range of 300-400°C. The effect of reaction conditions on m-xylene conversion, p-xylene/o-xylene (P/O) ratios, ratio of isomerization to disproportionation (I/D) products were investigated with the view of comparing the respective performances of the catalysts. Kinetic parameters for the disappearance of m-xylene were determined using catalyst activity decay function based on time-on-stream (TOS). The experimental results show that SSZ-33, TNU-9 and mordenite gave higher m-xylene conversion compared to ZSM-5. Both m-xylene P/O and I/D ratios over the catalysts were found to be in the order: ZSM-5>TNU-9>SSZ-33>mordenite. Apparent activation energy for m-xylene disproportionation reaction was found to decrease in the order: E_ZSM-5>E_TNU-9>E_mordenite>E_SSZ-33. The riser simulator and the modeling procedures employed have proved to be very effective as tools in investigating fluidized bed reaction kinetics.

Original language	English
Pages (from-to)	348-357
Number of pages	10
Journal	Chemical Engineering Journal
Volume	166
Issue number	1
DOIs	https://doi.org/10.1016/j.cej.2010.11.004
State	Published - 1 Jan 2011

Bibliographical note

Funding Information:
The authors acknowledge the support from Ministry of Higher Education, Saudi Arabia for the establishment of the Center of Research Excellence in Petroleum Refining and Petrochemicals at King Fahd University of Petroleum and Minerals (KFUPM). The authors thank J. Heyrovsky Institute of Physical Chemistry for providing zeolites TNU-9 and SSZ-33 and their characterization.

Keywords

Disproportionation
Isomerization
Mordenite
SSZ-33
TNU-9
Xylene reactions
ZSM-5

ASJC Scopus subject areas

General Chemistry
Environmental Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

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10.1016/j.cej.2010.11.004

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title = "Comparison studies of xylene isomerization and disproportionation reactions between SSZ-33, TNU-9, mordenite and ZSM-5 zeolite catalysts",

abstract = "m-Xylene isomerization and disproportionation kinetics have been studied over four zeolite catalysts (ZSM-5, mordenite, SSZ-33 and TNU-9) in a riser simulator reactor over the temperature range of 300-400°C. The effect of reaction conditions on m-xylene conversion, p-xylene/o-xylene (P/O) ratios, ratio of isomerization to disproportionation (I/D) products were investigated with the view of comparing the respective performances of the catalysts. Kinetic parameters for the disappearance of m-xylene were determined using catalyst activity decay function based on time-on-stream (TOS). The experimental results show that SSZ-33, TNU-9 and mordenite gave higher m-xylene conversion compared to ZSM-5. Both m-xylene P/O and I/D ratios over the catalysts were found to be in the order: ZSM-5>TNU-9>SSZ-33>mordenite. Apparent activation energy for m-xylene disproportionation reaction was found to decrease in the order: EZSM-5>ETNU-9>Emordenite>ESSZ-33. The riser simulator and the modeling procedures employed have proved to be very effective as tools in investigating fluidized bed reaction kinetics.",

keywords = "Disproportionation, Isomerization, Mordenite, SSZ-33, TNU-9, Xylene reactions, ZSM-5",

author = "Tukur, \{Nasiru M.\} and Sulaiman Al-Khattaf",

note = "Funding Information: The authors acknowledge the support from Ministry of Higher Education, Saudi Arabia for the establishment of the Center of Research Excellence in Petroleum Refining and Petrochemicals at King Fahd University of Petroleum and Minerals (KFUPM). The authors thank J. Heyrovsky Institute of Physical Chemistry for providing zeolites TNU-9 and SSZ-33 and their characterization.",

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doi = "10.1016/j.cej.2010.11.004",

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AU - Tukur, Nasiru M.

AU - Al-Khattaf, Sulaiman

N1 - Funding Information: The authors acknowledge the support from Ministry of Higher Education, Saudi Arabia for the establishment of the Center of Research Excellence in Petroleum Refining and Petrochemicals at King Fahd University of Petroleum and Minerals (KFUPM). The authors thank J. Heyrovsky Institute of Physical Chemistry for providing zeolites TNU-9 and SSZ-33 and their characterization.

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N2 - m-Xylene isomerization and disproportionation kinetics have been studied over four zeolite catalysts (ZSM-5, mordenite, SSZ-33 and TNU-9) in a riser simulator reactor over the temperature range of 300-400°C. The effect of reaction conditions on m-xylene conversion, p-xylene/o-xylene (P/O) ratios, ratio of isomerization to disproportionation (I/D) products were investigated with the view of comparing the respective performances of the catalysts. Kinetic parameters for the disappearance of m-xylene were determined using catalyst activity decay function based on time-on-stream (TOS). The experimental results show that SSZ-33, TNU-9 and mordenite gave higher m-xylene conversion compared to ZSM-5. Both m-xylene P/O and I/D ratios over the catalysts were found to be in the order: ZSM-5>TNU-9>SSZ-33>mordenite. Apparent activation energy for m-xylene disproportionation reaction was found to decrease in the order: EZSM-5>ETNU-9>Emordenite>ESSZ-33. The riser simulator and the modeling procedures employed have proved to be very effective as tools in investigating fluidized bed reaction kinetics.

AB - m-Xylene isomerization and disproportionation kinetics have been studied over four zeolite catalysts (ZSM-5, mordenite, SSZ-33 and TNU-9) in a riser simulator reactor over the temperature range of 300-400°C. The effect of reaction conditions on m-xylene conversion, p-xylene/o-xylene (P/O) ratios, ratio of isomerization to disproportionation (I/D) products were investigated with the view of comparing the respective performances of the catalysts. Kinetic parameters for the disappearance of m-xylene were determined using catalyst activity decay function based on time-on-stream (TOS). The experimental results show that SSZ-33, TNU-9 and mordenite gave higher m-xylene conversion compared to ZSM-5. Both m-xylene P/O and I/D ratios over the catalysts were found to be in the order: ZSM-5>TNU-9>SSZ-33>mordenite. Apparent activation energy for m-xylene disproportionation reaction was found to decrease in the order: EZSM-5>ETNU-9>Emordenite>ESSZ-33. The riser simulator and the modeling procedures employed have proved to be very effective as tools in investigating fluidized bed reaction kinetics.

KW - Disproportionation

KW - Isomerization

KW - Mordenite

KW - SSZ-33

KW - TNU-9

KW - Xylene reactions

KW - ZSM-5

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DO - 10.1016/j.cej.2010.11.004

M3 - Article

AN - SCOPUS:78650307057

SN - 1385-8947

VL - 166

SP - 348

EP - 357

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

IS - 1

ER -

Comparison studies of xylene isomerization and disproportionation reactions between SSZ-33, TNU-9, mordenite and ZSM-5 zeolite catalysts

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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