Benzylation of benzene over Fe-modified ZSM-5 zeolites: Correlation between activity and adsorption properties

Dı́az, Eva; Ordóñez, Salvador; Vega, Aurelio; Auroux, A.; Coca, José

doi:10.1016/j.apcata.2005.07.059

Cited by 38 publications

(24 citation statements)

References 32 publications

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“…As shown in Fig. 11A, the Fe 2p peak of fresh catalyst had only one signal at 710.2 eV, which corresponds to Fe 2 O 3 [45,46]. In the characteristic chloride region of this catalyst, no signal was observed.…”

Section: Characterization Of Iron Speciesmentioning

confidence: 82%

Catalytic oxidation of trichloroethylene over Fe-ZSM-5: Influence of the preparation method on the iron species and the catalytic behavior

Romero‐Sáez

Divakar

Aranzabal

et al. 2016

Applied Catalysis B: Environmental

110

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Section: Characterization Of Iron Speciesmentioning

confidence: 82%

Catalytic oxidation of trichloroethylene over Fe-ZSM-5: Influence of the preparation method on the iron species and the catalytic behavior

Romero‐Sáez

Divakar

Aranzabal

et al. 2016

Applied Catalysis B: Environmental

110

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“…Xie et al [31] proposed a mechanism for the partial oxidation of propylene to acrylic acid based on the adsorption parameters of reactive and products on styrene divinylbenzene copolymer (SDB) and Pd supported on SDB. Likewise, Díaz et al [53] studied the performance of Fe-ZSM-5 catalysts for benzylation of benzene with benzyl chloride in terms of their chemical and adsorption properties. Finally, a mention to the reverse-flow (RF) GC technique, which is a variation of IGC where the probe molecule is injected at a middle point of the column containing the adsorbent as stationary phase, and the direction of carrier gas flow is reversed from time to time.…”

Section: Applications and Comparison To Other Techniquesmentioning

confidence: 98%

Characterisation of Catalysts and Adsorbents by Inverse Gas Chromatography

Dı́az

Ordóñez

2013

Calorimetry and Thermal Methods in Catalysis

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Inverse Gas Chromatography (IGC), in contrast to analytical chromatography, consists on adsorption of a known solute on an adsorbent whose properties are to be determined. The shape and positions of the peaks supply information about the nature and reactivity of the solid surface. If different probe molecules are used (i.e. polar and apolar molecules, molecules with acid/base properties), it is possible to study the specificity of these interactions. Therefore, IGC can be used both as a tool for both characterizing the adsorption of a given compound on a given solid or for studying the nature (in terms of acid-base properties, polar or apolar interactions, etc.) of the active sites of a certain catalyst. IntroductionSorption measurements are a useful method in the characterization of solid materials. From these data, it is possible to obtain information about the capacity of adsorption, but also thermodynamic properties-enthalpies of adsorption, surface energy-as well as kinetic information, such as diffusion rates. Sorption measurements can be obtained either by static or dynamic methods. Static methods carried out the adsorption measurements under vacuum, after a pre-treatment at high temperature in order to clean the material surface. Dynamic methods use a flowing gas device. Inverse gas chromatography (IGC) is a dynamic method. In comparison to static adsorption systems, dynamic sorption techniques show shorter measurement time, and a wider range of experimental possibilities.In contrast to analytical chromatography, the stationary phase is the sample under investigation, and the mobile phase acts as probe molecule. Thus, the roles of the

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“…In this work, a p is calculated from the liquid density, ρ, and the molar weight of the probe, M, assuming molecules of spherical shape in a hexagonal close-packed configuration [31,38].…”

Section: Standard Free Energy Of Adsorption: Specific and Dispersive mentioning

confidence: 99%

“…IGC has been widely utilized to study synthetic and biological polymers [15], copolymers [16], polymer blends [17], adsorbents [18], foods [19], carbon blacks [20], fibers [21], clays [22], and catalysts [23][24][25][26][27][28][29][30][31]. In recent years, Diaz et al [14,[25][26][27][28][29]31] reported numerous studies on the surface of catalysts using inverse gas chromatography. Probably the main drawback of the method is that IGC only provides physicochemical properties of the stationary statistically independent of time.…”

Section: Introductionmentioning

confidence: 99%