Journal ArticleDOI
Stoichiometric adsorption complexes in [B]- and [Fe]-ZSM-5 zeolites
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TLDR
In this article, the effect of trivalent ion incorporation into the zeolite framework was investigated using temperature-programmed desorption (TPD) and thermogravimetric analysis (TGA).About:
This article is published in Journal of Catalysis.The article was published on 1989-03-01. It has received 53 citations till now. The article focuses on the topics: Adsorption & Zeolite.read more
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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.
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What do we know about the acidity of solid acids
TL;DR: In this article, the authors describe results from their laboratory on the characterization and description of the acid sites in high-silica zeolites, especially H•MFI, and demonstrate that a gas-phase basis provides better predictive capabilities.
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New method for the temperature-programmed desorption (TPD) of ammonia experiment for characterization of zeolite acidity: a review.
TL;DR: Improved measurement of IR spectroscopy with ammonia TPD improved the characterization of zeolite acidity and its improvement by simultaneous IR measurement and DFT calculation, and understanding of the catalytic cracking activity based on the derived acidic profile is explained.
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Amine adsorption in H-ZSM-5
TL;DR: In this paper, the authors examined the adsorption of simple amines, including methylamine and pyridine on H-ZSM-5 using temperature-programmed desorption (TPD), thermogravimetric analysis (TGA) and transmission infrared spectroscopy.
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Epitaxial Growth of ZSM-5@Silicalite-1: A Core–Shell Zeolite Designed with Passivated Surface Acidity
TL;DR: The synthesis of ZSM-5@silicalite-1 offers a pathway for tailoring the physicochemical properties of MFI-type materials, notably in the area of catalysis, where surface passivation can enhance product selectivity without sacrificing catalyst activity.
References
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Infrared and temperature-programmed desorption study of the acidic properties of ZSM-5-type zeolites
TL;DR: In this article, infrared spectroscopy and temperature-programmed desorption have been used to investigate the acidic properties of ZSM-5-type zeolites, showing that the most active acidic sites are located at the channel intersections, and the weaker acidic sites correspond to terminal silanol groups on the external surface of the zeolite or possibly nonzeolitic impurities.
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Chemical and physical properties of the ZSM-5 substitutional series
TL;DR: In this article, a new silica-rich zeolite has been synthesized with greatly differing SiO2/Al2O3 ratios; the aluminum content, while always small, can be varied by several orders of magnitude.
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Isomorphous substitution in zeolite frameworks. 1. Acidity of surface hydroxyls in [B]-, [Fe]-, [Ga]-, and [Al]-ZSM-5
TL;DR: A series of isomorphously framework-substituted ZSM-5 zeolites has been characterized by Fourier transform infrared spectroscopy, with primary focus on the nu(OH) region, and by temperature programmed NH3 desorption as discussed by the authors.
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The active site of acidic aluminosilicate catalysts
TL;DR: The availability of solid acidic catalysts based on zeolite ZSM-5 make possible observations on the nature and absolute rate behaviour of the individual protonic sites as discussed by the authors, even at levels of parts per million, or less.
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Reactions on ZSM-5-type zeolite catalysts
TL;DR: In this paper, the main features of the catalytic conversion process are discussed and a mechanism is suggested for the formation of sorbed C3,C4 olefinic residues, and for initial carbon-carbon bond formation from methanol.