Influence of toluene-tetramethylbenzene transalkylation on heavy aromatics conversion to xylenes

Sulaiman S. Al-Khattaf; Syed A. Ali; Mogahid S. Osman; Abdullah M. Aitani

doi:10.1016/j.jiec.2014.05.018

Influence of toluene-tetramethylbenzene transalkylation on heavy aromatics conversion to xylenes

Sulaiman S. Al-Khattaf^*
, Syed A. Ali
, Mogahid S. Osman
, Abdullah M. Aitani

^*Corresponding author for this work

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

18 Scopus citations

Abstract

Transalkylation of toluene-tetramethylbenzene (TeMB) over MOR and BEA was investigated at 250-400. °C. Conversion of TeMB was higher than trimethylbenzene (TMB) and toluene. Xylene yield was in the following order: toluene-TMB-TeMB>toluene-TeMB>toluene-TMB≫toluene. Kinetic modeling for reaction network consisting of toluene-TeMB transalkylation; toluene disproportionation; and toluene-TMB transalkylation was carried out. Toluene-TeMB transalkylation rate was >50% higher than the toluene-TMB transalkylation while the toluene disproportionation was an order of magnitude slower than transalkylation reactions. An addition of 5-10. wt.% TeMBs to the heavy reformate caused minor impact on the xylene yield but an improvement in xylene selectivity.

Original language	English
Pages (from-to)	1077-1088
Number of pages	12
Journal	Journal of Industrial and Engineering Chemistry
Volume	21
DOIs	https://doi.org/10.1016/j.jiec.2014.05.018
State	Published - 25 Jan 2015

Bibliographical note

Publisher Copyright:
© 2014 The Korean Society of Industrial and Engineering Chemistry.

Keywords

Mordenite
Transalkylation
Xylenes
ZSM-5
Zeolite beta

ASJC Scopus subject areas

General Chemical Engineering

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10.1016/j.jiec.2014.05.018

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@article{bc3bc2b53bc8497fbd0ba48afd78db26,

title = "Influence of toluene-tetramethylbenzene transalkylation on heavy aromatics conversion to xylenes",

abstract = "Transalkylation of toluene-tetramethylbenzene (TeMB) over MOR and BEA was investigated at 250-400. °C. Conversion of TeMB was higher than trimethylbenzene (TMB) and toluene. Xylene yield was in the following order: toluene-TMB-TeMB>toluene-TeMB>toluene-TMB≫toluene. Kinetic modeling for reaction network consisting of toluene-TeMB transalkylation; toluene disproportionation; and toluene-TMB transalkylation was carried out. Toluene-TeMB transalkylation rate was >50\% higher than the toluene-TMB transalkylation while the toluene disproportionation was an order of magnitude slower than transalkylation reactions. An addition of 5-10. wt.\% TeMBs to the heavy reformate caused minor impact on the xylene yield but an improvement in xylene selectivity.",

keywords = "Mordenite, Transalkylation, Xylenes, ZSM-5, Zeolite beta",

author = "Al-Khattaf, \{Sulaiman S.\} and Ali, \{Syed A.\} and Osman, \{Mogahid S.\} and Aitani, \{Abdullah M.\}",

note = "Publisher Copyright: {\textcopyright} 2014 The Korean Society of Industrial and Engineering Chemistry.",

year = "2015",

month = jan,

day = "25",

doi = "10.1016/j.jiec.2014.05.018",

language = "English",

volume = "21",

pages = "1077--1088",

journal = "Journal of Industrial and Engineering Chemistry",

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publisher = "Korean Society of Industrial Engineering Chemistry",

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TY - JOUR

T1 - Influence of toluene-tetramethylbenzene transalkylation on heavy aromatics conversion to xylenes

AU - Al-Khattaf, Sulaiman S.

AU - Ali, Syed A.

AU - Osman, Mogahid S.

AU - Aitani, Abdullah M.

PY - 2015/1/25

Y1 - 2015/1/25

N2 - Transalkylation of toluene-tetramethylbenzene (TeMB) over MOR and BEA was investigated at 250-400. °C. Conversion of TeMB was higher than trimethylbenzene (TMB) and toluene. Xylene yield was in the following order: toluene-TMB-TeMB>toluene-TeMB>toluene-TMB≫toluene. Kinetic modeling for reaction network consisting of toluene-TeMB transalkylation; toluene disproportionation; and toluene-TMB transalkylation was carried out. Toluene-TeMB transalkylation rate was >50% higher than the toluene-TMB transalkylation while the toluene disproportionation was an order of magnitude slower than transalkylation reactions. An addition of 5-10. wt.% TeMBs to the heavy reformate caused minor impact on the xylene yield but an improvement in xylene selectivity.

AB - Transalkylation of toluene-tetramethylbenzene (TeMB) over MOR and BEA was investigated at 250-400. °C. Conversion of TeMB was higher than trimethylbenzene (TMB) and toluene. Xylene yield was in the following order: toluene-TMB-TeMB>toluene-TeMB>toluene-TMB≫toluene. Kinetic modeling for reaction network consisting of toluene-TeMB transalkylation; toluene disproportionation; and toluene-TMB transalkylation was carried out. Toluene-TeMB transalkylation rate was >50% higher than the toluene-TMB transalkylation while the toluene disproportionation was an order of magnitude slower than transalkylation reactions. An addition of 5-10. wt.% TeMBs to the heavy reformate caused minor impact on the xylene yield but an improvement in xylene selectivity.

KW - Mordenite

KW - Transalkylation

KW - Xylenes

KW - ZSM-5

KW - Zeolite beta

UR - https://www.scopus.com/pages/publications/84920709399

U2 - 10.1016/j.jiec.2014.05.018

DO - 10.1016/j.jiec.2014.05.018

M3 - Article

AN - SCOPUS:84920709399

SN - 1226-086X

VL - 21

SP - 1077

EP - 1088

JO - Journal of Industrial and Engineering Chemistry

JF - Journal of Industrial and Engineering Chemistry

ER -

Influence of toluene-tetramethylbenzene transalkylation on heavy aromatics conversion to xylenes

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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