Study on the Crystalline of Ru/TiO2 Catalyst for Selective Hydrogenation of Benzene

Leiji Wang; Zhaoyang Fei; Xian Chen; Jihai Tang; Mifen Cui; Xu Qiao

doi:10.11730/j.issn.1001-7631.2017.03.0255.06

Study on the Crystalline of Ru/TiO₂ Catalyst for Selective Hydrogenation of Benzene

Leiji Wang, Zhaoyang Fei, Xian Chen, Jihai Tang, Mifen Cui, Xu Qiao

COLLEGE OF CHEMICAL ENGINEERING

Nanjing Tech University

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

Abstract

Three types of Ru/TiO₂ catalysts were prepared by chemical reduction impregnation method with different crystal forms of TiO₂. The catalysts were characterized by X-ray diffraction (XRD), N₂ adsorption-desorption, transmission electron microscopy (TEM), NH₃-temperature programmed desorption (NH₃-TPD) and Fourier transform infrared spectroscopy (FTIR) were used to study the physicochemical properties of the catalysts. The catalytic performances of Ru/TiO₂ catalysts in the selective hydrogenation of benzene to cyclohexene were also investigated. The results showed that the activity of benzene hydrogenation was related to the dispersion of Ru in the Ru/TiO₂ catalysts. The higher the dispersion of Ru was, the higher the catalytic activity was and the selectivity of cyclohexene was negatively correlated with the acid amounts of Ru/TiO₂ catalysts. The Ru/TiO₂-P catalyst had the lowest acid content, the adsorption capacity of cyclohexene was the lowest, and the selectivity of cyclohexene was the highest at the same conversion rate. The kinetic analysis showed that the resulting k₁/k₂ ratio of the rate constants of the benzene to cyclohexene step (k₁) and the cyclohexene to cyclohexane step (k₂) was approximately positively correlated with the yield of cyclohexene.

Original language	English
Pages (from-to)	255-260
Number of pages	6
Journal	Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology
Volume	33
Issue number	3
DOIs	https://doi.org/10.11730/j.issn.1001-7631.2017.03.0255.06
State	Published - 25 Jun 2017

Keywords

Acid properties
Cyclohexene
Effect of crystal phase
Selective hydrogenation of benzene
Titania

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10.11730/j.issn.1001-7631.2017.03.0255.06

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title = "Study on the Crystalline of Ru/TiO2 Catalyst for Selective Hydrogenation of Benzene",

abstract = "Three types of Ru/TiO2 catalysts were prepared by chemical reduction impregnation method with different crystal forms of TiO2. The catalysts were characterized by X-ray diffraction (XRD), N2 adsorption-desorption, transmission electron microscopy (TEM), NH3-temperature programmed desorption (NH3-TPD) and Fourier transform infrared spectroscopy (FTIR) were used to study the physicochemical properties of the catalysts. The catalytic performances of Ru/TiO2 catalysts in the selective hydrogenation of benzene to cyclohexene were also investigated. The results showed that the activity of benzene hydrogenation was related to the dispersion of Ru in the Ru/TiO2 catalysts. The higher the dispersion of Ru was, the higher the catalytic activity was and the selectivity of cyclohexene was negatively correlated with the acid amounts of Ru/TiO2 catalysts. The Ru/TiO2-P catalyst had the lowest acid content, the adsorption capacity of cyclohexene was the lowest, and the selectivity of cyclohexene was the highest at the same conversion rate. The kinetic analysis showed that the resulting k1/k2 ratio of the rate constants of the benzene to cyclohexene step (k1) and the cyclohexene to cyclohexane step (k2) was approximately positively correlated with the yield of cyclohexene.",

keywords = "Acid properties, Cyclohexene, Effect of crystal phase, Selective hydrogenation of benzene, Titania",

author = "Leiji Wang and Zhaoyang Fei and Xian Chen and Jihai Tang and Mifen Cui and Xu Qiao",

year = "2017",

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T1 - Study on the Crystalline of Ru/TiO2 Catalyst for Selective Hydrogenation of Benzene

AU - Wang, Leiji

AU - Fei, Zhaoyang

AU - Chen, Xian

AU - Tang, Jihai

AU - Cui, Mifen

AU - Qiao, Xu

PY - 2017/6/25

Y1 - 2017/6/25

N2 - Three types of Ru/TiO2 catalysts were prepared by chemical reduction impregnation method with different crystal forms of TiO2. The catalysts were characterized by X-ray diffraction (XRD), N2 adsorption-desorption, transmission electron microscopy (TEM), NH3-temperature programmed desorption (NH3-TPD) and Fourier transform infrared spectroscopy (FTIR) were used to study the physicochemical properties of the catalysts. The catalytic performances of Ru/TiO2 catalysts in the selective hydrogenation of benzene to cyclohexene were also investigated. The results showed that the activity of benzene hydrogenation was related to the dispersion of Ru in the Ru/TiO2 catalysts. The higher the dispersion of Ru was, the higher the catalytic activity was and the selectivity of cyclohexene was negatively correlated with the acid amounts of Ru/TiO2 catalysts. The Ru/TiO2-P catalyst had the lowest acid content, the adsorption capacity of cyclohexene was the lowest, and the selectivity of cyclohexene was the highest at the same conversion rate. The kinetic analysis showed that the resulting k1/k2 ratio of the rate constants of the benzene to cyclohexene step (k1) and the cyclohexene to cyclohexane step (k2) was approximately positively correlated with the yield of cyclohexene.

AB - Three types of Ru/TiO2 catalysts were prepared by chemical reduction impregnation method with different crystal forms of TiO2. The catalysts were characterized by X-ray diffraction (XRD), N2 adsorption-desorption, transmission electron microscopy (TEM), NH3-temperature programmed desorption (NH3-TPD) and Fourier transform infrared spectroscopy (FTIR) were used to study the physicochemical properties of the catalysts. The catalytic performances of Ru/TiO2 catalysts in the selective hydrogenation of benzene to cyclohexene were also investigated. The results showed that the activity of benzene hydrogenation was related to the dispersion of Ru in the Ru/TiO2 catalysts. The higher the dispersion of Ru was, the higher the catalytic activity was and the selectivity of cyclohexene was negatively correlated with the acid amounts of Ru/TiO2 catalysts. The Ru/TiO2-P catalyst had the lowest acid content, the adsorption capacity of cyclohexene was the lowest, and the selectivity of cyclohexene was the highest at the same conversion rate. The kinetic analysis showed that the resulting k1/k2 ratio of the rate constants of the benzene to cyclohexene step (k1) and the cyclohexene to cyclohexane step (k2) was approximately positively correlated with the yield of cyclohexene.

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KW - Cyclohexene

KW - Effect of crystal phase

KW - Selective hydrogenation of benzene

KW - Titania

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Study on the Crystalline of Ru/TiO₂ Catalyst for Selective Hydrogenation of Benzene

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