Water‐Promoted Hydrocarbon Activation Catalyzed by Binuclear Gallium Sites in ZSM‐5 Zeolite

Hensen, Ejm Emiel; Pidko, Evgeny A.; Rane, NJ Neelesh; Santen, Rutger A. van

doi:10.1002/anie.200702463

Cited by 86 publications

(101 citation statements)

References 20 publications

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“…For instance, the oxidation and hydrolysis of reduced Ga species by water vapor with certain partial pressure have been reported on Ga(I)/ZSM-5. 31,32 Further efforts are required to unveil the responsible structure transformation of above-mentioned metal species.…”

Section: Resultsmentioning

confidence: 99%

Transformation of Isobutyl Alcohol to Aromatics over Zeolite-Based Catalysts

Huang

Zhang

et al. 2012

ACS Catal.

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One-step transformation of isobutyl alcohol to aromatics (benzene, toluene, and xylene) has been studied in a gas phase, fixed-bed reactor system over several purely acidic zeolites and zeolite-supported metal catalysts. ZSM-5 zeolites give higher aromatics yields (∼42 wt %) among the evaluated zeolites, and the Si/ Al ratios (Si/Al = 13−43) of ZSM-5 slightly influence their catalytic performances. During the transformation of isobutyl alcohol, large amounts of short alkanes (mainly propane and butane isomers) are also generated on the acidic ZSM-5. To improve the conversion to aromatics, several metal species (Zn, Ga, Mo, La, Ni, Ag, and Pt) are supported on the ZSM-5. The enhancements in aromatics yields (∼60 wt %) are observed only on the Zn/ZSM-5 catalysts. The incorporation of Zn species preferentially decreases the strong-strength Brønsted acidity and, thus, suppresses the cracking to C 3 fragments. Moreover, mainly the Zn species at the exchange sites facilitate the recombinative desorption of H 2 and, hence, enhance the reactions toward aromatics. Through these effects, Zn/ZSM-5 catalysts exhibit the remarkably promoted formation of toluene and xylene and inhibit the generation of undesired alkanes products.

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Section: Resultsmentioning

confidence: 99%

Transformation of Isobutyl Alcohol to Aromatics over Zeolite-Based Catalysts

Huang

Zhang

et al. 2012

ACS Catal.

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show abstract

“…However, other factors such as the Lewis acid sites, the function of metal cation on dehydrogenation, the effect of shape selectivity and the crystal size of CeO 2 should not be neglected [16,52,[56][57][58][59][60][61], especially for the Lewis acid sites [25,30,62], as the introduction of metal cation to the surface of HZSM-5 zeolite could result in the formation of both Brönsted acid sites and Lewis acid sites [30,32,34,54]. The results of XPS (Figs.…”

Section: Discussionmentioning

confidence: 98%

C2–C4 light olefins from bioethanol catalyzed by Ce-modified nanocrystalline HZSM-5 zeolite catalysts

Liu

Song

et al. 2011

Applied Catalysis B: Environmental

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“…1b). This site has previously been considered for the stabilization of binuclear cationic species in ZSM-5 zeolite [106]. The larger size and specific shape of this site allows the formation of a favorable coordination environment around both Fe centers, resulting in the efficient stabilization of the relatively large binuclear complex.…”

Section: Geometry Optimization Of [Feo]mentioning

confidence: 99%

Stability and reactivity of active sites for direct benzene oxidation to phenol in Fe/ZSM-5: A comprehensive periodic DFT study

Li,

Pidko,

van Santen

et al. 2011

Journal of Catalysis

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Water‐Promoted Hydrocarbon Activation Catalyzed by Binuclear Gallium Sites in ZSM‐5 Zeolite

Cited by 86 publications

References 20 publications

Transformation of Isobutyl Alcohol to Aromatics over Zeolite-Based Catalysts

Transformation of Isobutyl Alcohol to Aromatics over Zeolite-Based Catalysts

C2–C4 light olefins from bioethanol catalyzed by Ce-modified nanocrystalline HZSM-5 zeolite catalysts

Stability and reactivity of active sites for direct benzene oxidation to phenol in Fe/ZSM-5: A comprehensive periodic DFT study

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