Journal ArticleDOI
Determination and properties of acid sites in H-ferrierite: A comparison of ferrierite and MFI structures
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TLDR
In this article, a lower stability of bridging hydroxyls of H-ferrierite (3604 cm −1 ) with Si/Al 8.4 and its framework structure compared to those of HZSM-5 (3612 cm − 1 ) withSi/Al 12.6 was found.About:
This article is published in Microporous and Mesoporous Materials.The article was published on 1998-11-25. It has received 191 citations till now. The article focuses on the topics: Ferrierite & Pyridine.read more
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Siting and Distribution of Framework Aluminium Atoms in Silicon-Rich Zeolites and Impact on Catalysis
TL;DR: The siting and distribution of framework Al atoms dramatically affect catalytic activity/selectivity both of protonic and transition metal ion-containing zeolite catalysts.
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Acid-catalyzed synthesis of mono- and dialkyl benzenes over zeolites: active sites, zeolite topology, and reaction mechanisms
Jiří Čejka,Blanka Wichterlová +1 more
TL;DR: In this article, a review of catalytic reactions leading to mono-and dialkyl benzenes over zeolites is presented, with an emphasis on the effect of the type of acid sites, zeolite structure, and reaction conditions on the activity and selectivity of these complex reactions.
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Perspectives of Micro/Mesoporous Composites in Catalysis
Jiří Čejka,Svetlana Mintova +1 more
TL;DR: In this paper, the recent development in the field of synthesis, characterization and particularly catalytic investigation of zeolite-based materials combining micro and mesoporous features is discussed, and the relevance of individual experimental techniques for analysis of the composites, i.e., their structure, porosity, chemical composition, morphological features, and so on, are described.
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Probing zeolites by vibrational spectroscopies
Silvia Bordiga,Carlo Lamberti,Carlo Lamberti,Francesca Bonino,Arnaud Travert,Frédéric Thibault-Starzyk +5 more
TL;DR: This review addresses the most relevant aspects of vibrational spectroscopies applied to zeolites and zeotype materials and describes the methods needed to precisely determine the IR absorption coefficients, making IR a quantitative technique.
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Determination of the catalytically active oxidation Lewis acid sites in Sn-beta zeolites, and their optimisation by the combination of theoretical and experimental studies
TL;DR: In this paper, two types of Lewis acid sites are shown to exist in Sn-beta zeolite: partially hydrolysed framework tin centers (Si O ) 3 Sn OH (sites A) and fully framework coordinated tin atoms Sn( Si O ) 4 (sites B).
References
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Determination of integrated molar extinction coefficients for infrared absorption bands of pyridine adsorbed on solid acid catalysts
TL;DR: In this article, the integrated molar extinction coefficients for infrared absorption bands of pyridine adsorbed on acid sites in Si/Al-based catalysts were determined for infrared spectra of five zeolites and two amorphous silica-aluminas.
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An infrared study of pyridine adsorbed on acidic solids. Characterization of surface acidity
TL;DR: In this article, the infrared spectrum of pyridine coordinately bonded to the surface of acid solids has been determined and a rough estimate of the strength of surface Lewis sites can be inferred.
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Methods for Characterizing Zeolite Acidity
W. E. Farneth,Raymond J. Gorte +1 more
TL;DR: A review of the literature on standard approaches to quantification of Broensted acidity in zeolites can be found in this paper, where the authors provide a detailed look at the technique and its history, and add a few comments from experience with the application of each technique to standard materials like H-ZSM-5.
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Infrared studies of the surface acidity of oxides and zeolites using adsorbed probe molecules
TL;DR: In this article, the use of infrared spectroscopy to probe the surface acidity of oxides and molecular sieves is reviewed, and the experimental requirements and the type and nature of probe molecules available are also discussed.