47 research outputs found
On the caracter and catalytic activity of deffects formed by γ-irradiation of H- and AIH-zeolites
Get PDFActive Sites in Sn-Beta for Glucose Isomerization to Fructose and Epimerization to Mannose
Full text linkThe Influence of Si/Al Ratio on the Distribution of OH Groups in Zeolites with MWW Topology
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Cu-ZSM-5 Zeolites for the Formation of Methanol from Methane and Oxygen: Probing the Active Sites and Spectator Species
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Role of Hydrated Cu Ion Complexes and Aluminum Distribution in the Framework on the Cu Ion Siting in ZSM-5
No full textReactivity theory of zinc cation species in zeolites
No full textVarious forms of zinc cation stabilisation in zeolite cavities were considered. Their interaction with light alkanes (methane, ethane) was studied using ab initio methods. We studied the relation between stability of a site and its catalytic activity. In addition to cationic positions formed by a zeolitic ring with two AI ions, the sites with distantly placed aluminiums were also studied. It was shown that the latter tend to form oxygen bridged zinc cationic pairs. Such sites, as well as small zinc oxide clusters, exhibit a different enhanced reactivity towards alkanes compared to single zinc ions in cationic positions
Identification of Extra-Framework Species on Fe/ZSM-5 and Cu/ZSM-5 Catalysts Typical Microporous Molecular Sieves with Zeolitic Structure
No full textInfluence of Al Distribution and Defects Concentration of Ferrierite Catalysts Synthesized From Na-Free Gels in the Skeletal Isomerization of n-Butene
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