Shape-selective methylation of 4-methylbiphenyl to 4,4′-dimethylbiphenyl over zeolite HZSM-5 modified with metal oxides of MgO, CaO, SrO, BaO, and ZnO

Xinwen Guo, Jian Ping Shen, Lu Sun, Chunshan Song, Xiangsheng Wang

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

A series of ZSM-5 samples modified with metal oxides MO (M = Mg, Ca, Sr, Ba and Zn) were employed for the alkylation of 4-methylbiphenyl (4-MBP) with methanol to 4,4′-dimethylbiphenyl (4,4′-DMBP) under fixed-bed down-flow conditions. The methylation results showed that the use of basic metal oxides can effectively enhance the selectivity to the target product 4,4′-DMBP. MgO is the most effective modifier among the metal oxides used and it can improve selectivity to 4,4′-DMBP up to 80% as compared to only 13% over the parent zeolite HZSM-5. The modification effectiveness of metal oxides on 4,4′-DMBP selectivity can be arranged in the order MgO > SrO ∼ ZnO ∼ CaO > BaO. The optimization of MgO modification through the content, salt types and loading methods revealed that proper MgO loading (5.6 wt%) can be more effective, and the impregnation method is much better than ion exchange. The correlation of physicochemical properties (TPD, TGA, chemical analysis and chemical adsorption, etc.) of the modified HZSM-5 with the catalytic data showed that the high selectivity over ZSM-5 modified with MgO largely results from the effective suppression of 4,4′DMBP secondary reactions such as isomerization, dealkylation and alkylation.

Original languageEnglish (US)
Pages (from-to)25-29
Number of pages5
JournalCatalysis Letters
Volume87
Issue number1-2
DOIs
StatePublished - Apr 1 2003

Fingerprint

Zeolites
Methylation
Oxides
Metals
Alkylation
Temperature programmed desorption
Isomerization
Impregnation
Methanol
Ion exchange
Salts
Adsorption
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

Cite this

@article{06257883a8fc456fa58a69ae79eabeaf,
title = "Shape-selective methylation of 4-methylbiphenyl to 4,4′-dimethylbiphenyl over zeolite HZSM-5 modified with metal oxides of MgO, CaO, SrO, BaO, and ZnO",
abstract = "A series of ZSM-5 samples modified with metal oxides MO (M = Mg, Ca, Sr, Ba and Zn) were employed for the alkylation of 4-methylbiphenyl (4-MBP) with methanol to 4,4′-dimethylbiphenyl (4,4′-DMBP) under fixed-bed down-flow conditions. The methylation results showed that the use of basic metal oxides can effectively enhance the selectivity to the target product 4,4′-DMBP. MgO is the most effective modifier among the metal oxides used and it can improve selectivity to 4,4′-DMBP up to 80{\%} as compared to only 13{\%} over the parent zeolite HZSM-5. The modification effectiveness of metal oxides on 4,4′-DMBP selectivity can be arranged in the order MgO > SrO ∼ ZnO ∼ CaO > BaO. The optimization of MgO modification through the content, salt types and loading methods revealed that proper MgO loading (5.6 wt{\%}) can be more effective, and the impregnation method is much better than ion exchange. The correlation of physicochemical properties (TPD, TGA, chemical analysis and chemical adsorption, etc.) of the modified HZSM-5 with the catalytic data showed that the high selectivity over ZSM-5 modified with MgO largely results from the effective suppression of 4,4′DMBP secondary reactions such as isomerization, dealkylation and alkylation.",
author = "Xinwen Guo and Shen, {Jian Ping} and Lu Sun and Chunshan Song and Xiangsheng Wang",
year = "2003",
month = "4",
day = "1",
doi = "10.1023/A:1022892724452",
language = "English (US)",
volume = "87",
pages = "25--29",
journal = "Catalysis Letters",
issn = "1011-372X",
publisher = "Springer Netherlands",
number = "1-2",

}

Shape-selective methylation of 4-methylbiphenyl to 4,4′-dimethylbiphenyl over zeolite HZSM-5 modified with metal oxides of MgO, CaO, SrO, BaO, and ZnO. / Guo, Xinwen; Shen, Jian Ping; Sun, Lu; Song, Chunshan; Wang, Xiangsheng.

In: Catalysis Letters, Vol. 87, No. 1-2, 01.04.2003, p. 25-29.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Shape-selective methylation of 4-methylbiphenyl to 4,4′-dimethylbiphenyl over zeolite HZSM-5 modified with metal oxides of MgO, CaO, SrO, BaO, and ZnO

AU - Guo, Xinwen

AU - Shen, Jian Ping

AU - Sun, Lu

AU - Song, Chunshan

AU - Wang, Xiangsheng

PY - 2003/4/1

Y1 - 2003/4/1

N2 - A series of ZSM-5 samples modified with metal oxides MO (M = Mg, Ca, Sr, Ba and Zn) were employed for the alkylation of 4-methylbiphenyl (4-MBP) with methanol to 4,4′-dimethylbiphenyl (4,4′-DMBP) under fixed-bed down-flow conditions. The methylation results showed that the use of basic metal oxides can effectively enhance the selectivity to the target product 4,4′-DMBP. MgO is the most effective modifier among the metal oxides used and it can improve selectivity to 4,4′-DMBP up to 80% as compared to only 13% over the parent zeolite HZSM-5. The modification effectiveness of metal oxides on 4,4′-DMBP selectivity can be arranged in the order MgO > SrO ∼ ZnO ∼ CaO > BaO. The optimization of MgO modification through the content, salt types and loading methods revealed that proper MgO loading (5.6 wt%) can be more effective, and the impregnation method is much better than ion exchange. The correlation of physicochemical properties (TPD, TGA, chemical analysis and chemical adsorption, etc.) of the modified HZSM-5 with the catalytic data showed that the high selectivity over ZSM-5 modified with MgO largely results from the effective suppression of 4,4′DMBP secondary reactions such as isomerization, dealkylation and alkylation.

AB - A series of ZSM-5 samples modified with metal oxides MO (M = Mg, Ca, Sr, Ba and Zn) were employed for the alkylation of 4-methylbiphenyl (4-MBP) with methanol to 4,4′-dimethylbiphenyl (4,4′-DMBP) under fixed-bed down-flow conditions. The methylation results showed that the use of basic metal oxides can effectively enhance the selectivity to the target product 4,4′-DMBP. MgO is the most effective modifier among the metal oxides used and it can improve selectivity to 4,4′-DMBP up to 80% as compared to only 13% over the parent zeolite HZSM-5. The modification effectiveness of metal oxides on 4,4′-DMBP selectivity can be arranged in the order MgO > SrO ∼ ZnO ∼ CaO > BaO. The optimization of MgO modification through the content, salt types and loading methods revealed that proper MgO loading (5.6 wt%) can be more effective, and the impregnation method is much better than ion exchange. The correlation of physicochemical properties (TPD, TGA, chemical analysis and chemical adsorption, etc.) of the modified HZSM-5 with the catalytic data showed that the high selectivity over ZSM-5 modified with MgO largely results from the effective suppression of 4,4′DMBP secondary reactions such as isomerization, dealkylation and alkylation.

UR - http://www.scopus.com/inward/record.url?scp=0141882988&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0141882988&partnerID=8YFLogxK

U2 - 10.1023/A:1022892724452

DO - 10.1023/A:1022892724452

M3 - Article

VL - 87

SP - 25

EP - 29

JO - Catalysis Letters

JF - Catalysis Letters

SN - 1011-372X

IS - 1-2

ER -