Silylation effect on the catalytic properties of FeZSM-11 in benzene oxidation to phenol

Piryutko, L. V.; Паренаго, О. О.; Lunina, E. V.; Харитонов, А. С.; Okkel, L. G.; Panov, G. I.

doi:10.1007/bf02067799

Cited by 21 publications

(8 citation statements)

References 14 publications

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“…It is also possible to incorporate iron into the zeolite framework already during the synthesis of the zeolite. In a framework position iron is not catalytically active [2,22]. It has to be extracted from the framework by steaming at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

N2O decomposition over iron-containing zeolites prepared by different methods: a comparison of the reaction mechanism

Pirngruber

Luechinger

Roy

et al. 2004

Journal of Catalysis

107

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Section: Introductionmentioning

confidence: 99%

N2O decomposition over iron-containing zeolites prepared by different methods: a comparison of the reaction mechanism

Pirngruber

Luechinger

Roy

et al. 2004

Journal of Catalysis

107

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“…Fe/ZSM-5 20 52 28 Fe/ZSM-5-ST 35 54 11 a Isolated Fe(III) ions in tetrahedral and higher coordination; b Oligomeric Fe(III)xOy clusters; c Aggregated Fe2O3 particles.…”

Section: Samples A1 a [%] A2 B [%] A3 C [%]mentioning

confidence: 99%

“…In contrast to an increase in the amount of LAS as the calcined temperature increases, the initial selectivity toward phenol exhibits a notable decrease. The explanation for this behavior is that a higher calcined temperature causes the collapse of part of the framework structure, covering the LAS exposed originally [52,53], which results in a decrease of the initial selectivity toward phenol. Therefore, high temperature calcined H-ZSM-5 hinders the reaction due to the presence of more LAS.…”

Section: Catalyst Performance In Benzene Hydroxylation Reactionmentioning

confidence: 99%

The ZSM-5-Catalyzed Oxidation of Benzene to Phenol with N2O: Effect of Lewis Acid Sites

Ouyang

2019

Catalysts

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The oxidation of benzene to phenol (BTOP) with N 2 O as the oxidant has been studied with a variety of Fe/ZSM-5 catalysts. The literature has conclusively proven that Fe 2+ sites are the active sites. However, some studies have suggested that the Lewis acidic sites (LAS) are responsible for the generation of the active chemisorbed oxygen. Nevertheless, there is no clear relationship between the LAS and the N 2 O selectivity to phenol. In an effort to elucidate the effects of LAS on BTOP with various ZSM-5 catalysts, we investigated the initial N 2 O selectivity to phenol. Here we show that the initial N 2 O selectivity to phenol is negative with the amount of LAS over a certain range. The catalyst H-ZSM-5-ST (H-ZSM-5 treated with water vapor) showed a remarkable initial N 2 O selectivity to phenol as high as 95.9% with a 0.021 mmol g −1 LAS concentration on the surface of the catalyst, while the Fe/ZSM-5 catalyst demonstrated the lowest initial N 2 O selectivity to phenol (11.7%) with the highest LAS concentration (0.137 mmol g −1 ). Another remarkable feature is that steaming was more effective than Fe ion exchange and high temperature calcining. The samples were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), N 2 -adsorption-desorption, UV-vis, NH 3 -TPD and pyridine Fourier transform infrared (FT-IR) techniques. Our results demonstrate how the concentration of LAS is likely to affect the initial N 2 O selectivity to phenol within a certain range (0.021-0.137 mmol g −1 ). This research has demonstrated the synergy between the active Fe 2+ sites and LAS.

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“…This was convincingly shown by studies on the mechanism of benzene oxidation. [14,19,20] Therefore, steric restrictions within the micropores should be a very important factor affecting the distribution of o-and p-isomers at phenol oxidation with nitrous oxide.…”

Section: Distribution Of Dhb Isomersmentioning

confidence: 99%

New Way of Hydroquinone and Catechol Synthesis using Nitrous Oxide as Oxidant

Иванов

Соболев

Pirutko

et al. 2002

Advanced Synthesis & Catalysis

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Silylation effect on the catalytic properties of FeZSM-11 in benzene oxidation to phenol

Cited by 21 publications

References 14 publications

N2O decomposition over iron-containing zeolites prepared by different methods: a comparison of the reaction mechanism

N2O decomposition over iron-containing zeolites prepared by different methods: a comparison of the reaction mechanism

The ZSM-5-Catalyzed Oxidation of Benzene to Phenol with N2O: Effect of Lewis Acid Sites

New Way of Hydroquinone and Catechol Synthesis using Nitrous Oxide as Oxidant

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