A new catalytic process for the synthesis of para-xylene through benzene methylation with CH3Br

Ying Ying Zhang; Yue Fang Li; Lang Chen; Chak Tong Au; Shuang Feng Yin

doi:10.1016/j.catcom.2014.05.013

A new catalytic process for the synthesis of para-xylene through benzene methylation with CH₃Br

Ying Ying Zhang, Yue Fang Li, Lang Chen, Chak Tong Au, Shuang Feng Yin^*

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

21 Citations (Scopus)

Abstract

A new process for the generation of para-xylene (p-xylene) through benzene alkylation with CH₃Br has been proposed for the first time. CH ₃Br is prepared by the catalytic bromination of methane (the main component of natural gas), and benzene can be prepared from methane dehydroaromatization. Over the optimized P₂O₅-ZnO/HZSM-5 catalyst, benzene conversion is 43.6% and p-xylene selectivity is 91.2% at 475 °C, and the molar ratio of p-xylene in the liquid product is 28.7%. The relationship between the acidity and the catalytic efficiency of the modified H-ZSM-5 samples was investigated. It is found that isomerization of p-xylene occurs on the strong acid sites rather than on the weak acid sites, and benzene conversion is subject to the influence of strong acid sites.

Original language	English
Pages (from-to)	6-10
Number of pages	5
Journal	Catalysis Communications
Volume	54
DOIs	https://doi.org/10.1016/j.catcom.2014.05.013
Publication status	Published - 5 Sept 2014

Scopus Subject Areas

Catalysis
Chemistry(all)
Process Chemistry and Technology

User-Defined Keywords

Benzene
Bromomethane
HZSM-5
Natural gas
p-Xylene

Access to Document

10.1016/j.catcom.2014.05.013

Cite this

@article{a03e87c5e91c4732aa0c26b0d15d9eae,

title = "A new catalytic process for the synthesis of para-xylene through benzene methylation with CH3Br",

abstract = "A new process for the generation of para-xylene (p-xylene) through benzene alkylation with CH3Br has been proposed for the first time. CH 3Br is prepared by the catalytic bromination of methane (the main component of natural gas), and benzene can be prepared from methane dehydroaromatization. Over the optimized P2O5-ZnO/HZSM-5 catalyst, benzene conversion is 43.6% and p-xylene selectivity is 91.2% at 475 °C, and the molar ratio of p-xylene in the liquid product is 28.7%. The relationship between the acidity and the catalytic efficiency of the modified H-ZSM-5 samples was investigated. It is found that isomerization of p-xylene occurs on the strong acid sites rather than on the weak acid sites, and benzene conversion is subject to the influence of strong acid sites.",

keywords = "Benzene, Bromomethane, HZSM-5, Natural gas, p-Xylene",

author = "Zhang, {Ying Ying} and Li, {Yue Fang} and Lang Chen and Au, {Chak Tong} and Yin, {Shuang Feng}",

note = "Funding Information: This project was financially supported by the National Natural Science Foundation of China ( 21273067 , U1162109 ), the Program for New Century Excellent Talents in Universities ( NCET-10-0371 ), the Program for Changjiang Scholars and Innovative Research Team in University ( IRT1238 ), and the Fundamental Research Funds for the Central Universities. C. T. Au thanks the Hunan University for an adjunct professorship. ",

year = "2014",

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doi = "10.1016/j.catcom.2014.05.013",

language = "English",

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journal = "Catalysis Communications",

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T1 - A new catalytic process for the synthesis of para-xylene through benzene methylation with CH3Br

AU - Zhang, Ying Ying

AU - Li, Yue Fang

AU - Chen, Lang

AU - Au, Chak Tong

AU - Yin, Shuang Feng

N1 - Funding Information: This project was financially supported by the National Natural Science Foundation of China ( 21273067 , U1162109 ), the Program for New Century Excellent Talents in Universities ( NCET-10-0371 ), the Program for Changjiang Scholars and Innovative Research Team in University ( IRT1238 ), and the Fundamental Research Funds for the Central Universities. C. T. Au thanks the Hunan University for an adjunct professorship.

PY - 2014/9/5

Y1 - 2014/9/5

N2 - A new process for the generation of para-xylene (p-xylene) through benzene alkylation with CH3Br has been proposed for the first time. CH 3Br is prepared by the catalytic bromination of methane (the main component of natural gas), and benzene can be prepared from methane dehydroaromatization. Over the optimized P2O5-ZnO/HZSM-5 catalyst, benzene conversion is 43.6% and p-xylene selectivity is 91.2% at 475 °C, and the molar ratio of p-xylene in the liquid product is 28.7%. The relationship between the acidity and the catalytic efficiency of the modified H-ZSM-5 samples was investigated. It is found that isomerization of p-xylene occurs on the strong acid sites rather than on the weak acid sites, and benzene conversion is subject to the influence of strong acid sites.

AB - A new process for the generation of para-xylene (p-xylene) through benzene alkylation with CH3Br has been proposed for the first time. CH 3Br is prepared by the catalytic bromination of methane (the main component of natural gas), and benzene can be prepared from methane dehydroaromatization. Over the optimized P2O5-ZnO/HZSM-5 catalyst, benzene conversion is 43.6% and p-xylene selectivity is 91.2% at 475 °C, and the molar ratio of p-xylene in the liquid product is 28.7%. The relationship between the acidity and the catalytic efficiency of the modified H-ZSM-5 samples was investigated. It is found that isomerization of p-xylene occurs on the strong acid sites rather than on the weak acid sites, and benzene conversion is subject to the influence of strong acid sites.

KW - Benzene

KW - Bromomethane

KW - HZSM-5

KW - Natural gas

KW - p-Xylene

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DO - 10.1016/j.catcom.2014.05.013

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