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Journal Article 3

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2023 1

2019 1

2015 1

Keywords

alkaline treatment 2

aromatics 2

ZSM-5 1

ZSM-5 zeolite 1

aromatization 1

carbon dioxide 1

coupling reaction 1

dealumination 1

desilication 1

hierarchical ZSM-5 1

mesopores 1

methanol 1

methanol aromatization 1

steam treatment 1

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Enhancing the aromatic selectivity of cyclohexane aromatization by CO2 coupling

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11,   Pages 1801-1808 doi: 10.1007/s11705-023-2325-9

Abstract: Improving the aromatic selectivity in the alkane aromatization process is of great importance for itsstudy may open a green, economic, and promising way to improve the aromatic selectivity for alkane aromatization

Keywords： aromatics     carbon dioxide     aromatization     coupling reaction     ZSM-5 zeolite    

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Alkaline modification of ZSM-5 catalysts for methanol aromatization: The effect of the alkaline concentration

Zhenhao Wei,Tengfei Xia,Minghui Liu,Qingsheng Cao,Yarong Xu,Kake Zhu,Xuedong Zhu

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 4,   Pages 450-460 doi: 10.1007/s11705-015-1542-2

Abstract: The effects of alkaline treatment on the physical properties of ZSM-5 catalysts and on their activities for methanol to aromatics conversion have been investigated. A mild alkaline treatment (0.2 and 0.3 mol/L NaOH) created mesopores in the parent zeolite with no obvious effect on acidity. The presence of mesopores gives the catalyst a longer lifetime and higher selectivity for aromatics. Treatment with 0.4 mol/L NaOH decreased the number of Brønsted acid sites due to dealumination and desilication, which resulted in a lower deactivation rate. In addition, more mesopores were produced than with the mild alkaline treatment. As a result, the lifetime of the sample treated with 0.4 mol/L NaOH was almost five times that of the parent ZSM-5. Treatment with a higher alkaline concentration (0.5 mol/L) greatly reduced the number of Brønsted acid sites and the number of micropores resulting in incomplete methanol conversion. When the alkaline-treated catalysts were washed with acid, some of the porosity was restored and a slight increase in selectivity for aromatics was obtained.

Keywords： aromatics     ZSM-5     alkaline treatment     dealumination     desilication     mesopores     methanol    

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desilication for Al-rich HZSM-5 zeolite via steam-alkaline treatment and its application in methanol aromatization

Yuehua Fang, Fan Yang, Xuan He, Xuedong Zhu

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 3,   Pages 543-553 doi: 10.1007/s11705-018-1778-8

Abstract: Methanol aromatization reaction was employed to evaluate the catalytic performance of treated HZSM-5

Keywords： steam treatment     alkaline treatment     hierarchical ZSM-5     methanol aromatization    

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Title Author Date Type Operation

Enhancing the aromatic selectivity of cyclohexane aromatization by CO2 coupling

Journal Article

Alkaline modification of ZSM-5 catalysts for methanol aromatization: The effect of the alkaline concentration

Zhenhao Wei,Tengfei Xia,Minghui Liu,Qingsheng Cao,Yarong Xu,Kake Zhu,Xuedong Zhu

Journal Article

desilication for Al-rich HZSM-5 zeolite via steam-alkaline treatment and its application in methanol aromatization

Yuehua Fang, Fan Yang, Xuan He, Xuedong Zhu

Journal Article