Effect of preparation methods on the catalytic properties of Fe2O3/Al2O3-ZrO2 for ethylbenzene dehydrogenation

Zhang, Shujiao; Li, Wenying; Xiao-hong, LI

doi:10.1016/s1872-5813(15)30012-8

Cited by 7 publications

(2 citation statements)

References 10 publications

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“…Styrene (ST) is one of the platform chemicals for plastic and petrochemical industries, utilized primarily for the synthesis of polystyrene and ST copolymers such as acrylonitrile-butadiene-styrene (ABS), styrene acrylonitrile (SAN), styrene-butadiene rubber (SBR), fibers, ABA resin etc. [1][2][3][4][5][6]. At present, there are two main processes for the manufacture of ST.…”

Section: Introductionmentioning

confidence: 99%

Comparison of single-bed oxidative dehydrogenation of ethylbenzene with double-bed using CO2

2019

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The present study highlights the catalytic performance of 5 wt% Fe 2 O 3 supported on sodium chromosilicate (5F/NCS) in a single-bed reactor for dehydrogenation of ethylbenzene with CO 2 and compares it with the catalytic performance of two subsequent catalysts (5F/NCS + industrial oxidation catalyst) in a double-bed reactor. The support of the target nanocomposite catalyst was obtained by hydrothermal treatment and subsequently was loaded with a medium amount of 5 wt% γ-Fe 2 O 3. Structural and textural characterizations of the catalysts were performed by means of X-ray diffraction, scanning electron microscopy, transmission electron microscopy, N 2 physical adsorption analysis, and Fourier-transform infrared spectroscopy. The catalytic tests revealed that 5F/NCS in the single-bed reactor had a high ethylbenzene conversion (> 54%) and a low styrene selectivity (> 70%). In comparison with this observation, in the double-bed reactor with the presence of oxidation catalysts, styrene selectivity increased significantly (> 91%), however; ethylbenzene conversion indicated a minor decrease (> 50%). The high styrene selectivity (> 91%) and styrene yield (> 46%) in the double-bed reactor were ascribed to the coupling reaction of ethylbenzene dehydrogenation and RWGS as well as the synergistic effect of Pt-Sn in the structure of oxidation catalyst.

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Section: Introductionmentioning

confidence: 99%

Comparison of single-bed oxidative dehydrogenation of ethylbenzene with double-bed using CO2

2019

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“…In addition, it can accelerate the reaction rate, improve styrene selectivity, decrease the thermodynamic limitations, suppress the total oxidation, increase the catalyst life, and avoid hotspots [27]. Therefore, the ethylbenzene dehydrogenation with carbon dioxide has been studied over several different catalysts, including iron oxide, vanadium oxide, antimony oxide, chromium oxide, cerium oxide, zirconium oxide, lanthanum oxide, perovskites, and the oxide catalysts promoted with alkali metals supported on several oxides [16,19,20,24,[26][27][28][29][30][31][32][33]. In addition, several works have shown that carbon-based catalysts are active and selective to produce styrene through ethylbenzene dehydrogenation with carbon dioxide.…”

Section: Introductionmentioning

confidence: 99%

Effect of Dopants on the Properties of Zirconia‐Supported Iron Catalysts for Ethylbenzene Dehydrogenation with Carbon Dioxide

Rangel¹,

Lima²,

SantanaBorges³

et al. 2016

Greenhouse Gases - Selected Case Studies

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Due to the harmful effects of carbon dioxide to the environment, a lot of work has been carried out aiming to find new applications, which can decrease the emissions or to capture and use it. An attractive application for carbon dioxide is the synthesis of chemicals, especially for producing styrene by ethylbenzene dehydrogenation, in which it increases the catalyst activity and selectivity. In order to find efficient catalysts for the reaction, the effect of cerium, chromium, aluminum, and lanthanum on the properties of zirconia-supported iron oxides was studied in this work. The modified supports were prepared by precipitation and impregnated with iron nitrate. The obtained catalysts were characterized by thermogravimetry, Fourier transform infrared spectroscopy, Xray diffraction, specific surface area measurement, and temperature-programmed reduction. The catalysts showed different textural and catalytic properties, which were associated to the different phases in the solids, such as monoclinic or tetragonal zirconia, hematite, maghemite, cubic ceria, monoclinic or hexagonal lantana, and rhombohedral chromia, the active phases in ethylbenzene dehydrogenation. The most promising dopant was cerium, which produces the most active catalyst at the lowest temperature, probably due to its ability of providing lattice oxygen, which activates carbon dioxide and increases the reaction rate.

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Ethylbenzene Dehydrogenation to Styrene

Fan

Antony

Li*

2023

Industrial Arene Chemistry

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Effect of preparation methods on the catalytic properties of Fe2O3/Al2O3-ZrO2 for ethylbenzene dehydrogenation

Cited by 7 publications

References 10 publications

Comparison of single-bed oxidative dehydrogenation of ethylbenzene with double-bed using CO2

Comparison of single-bed oxidative dehydrogenation of ethylbenzene with double-bed using CO2

Effect of Dopants on the Properties of Zirconia‐Supported Iron Catalysts for Ethylbenzene Dehydrogenation with Carbon Dioxide

Ethylbenzene Dehydrogenation to Styrene

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