D. Martin
University of Poitiers
12 Papers
196 Citations
D. Martin is an academic researcher from University of Poitiers. The author has contributed to research in topics: Coke & Zeolite. The author has an hindex of 10, co-authored 12 publications.
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Papers
Roles of acidity and pore structure in the deactivation of zeolites by carbonaceous deposits
TL;DR: In this paper, the effects of pore structure of zeolites and of their acidity on the rate of formation of these carbonaceous compounds, on their composition and on their deactivating effect are examined.
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Acidic and catalytic properties of H-MCM-22 zeolites: 1. Characterization of the acidity by pyridine adsorption
TL;DR: In this paper, three H-MCM-22 zeolite samples with total Si/Al ratios of 10, 14 and 30 (M-10, M-14 and 30) calcined at 550°C were characterized by various techniques; 27 Al MAS NMR, XRD, nitrogen adsorption, pyridine adsorptions followed by infrared spectroscopy and by microcalorimetry Extraframework aluminium species (EFAL) are present in all the samples, mainly under the form of hydroxylated species responsible for an IR band at 3665
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m-Xylene transformation over H-MCM-22 zeolite: 1. Mechanisms and location of the reactions
TL;DR: In this paper, the transformation of m -xylene was investigated at 350°C over a MWW zeolite sample, and the distributions of desorbed products and of non-orbed product (coke) were established for a large range of contact times, hence of conversions (from 4.8 to 43.7%), and for different times on stream (TOS).
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Characterization of the internal and external acidity of H-MCM-22 zeolites
TL;DR: In this paper, a comparison of the IR spectra of 2,6- and 2,4-dimethylquinoline (DMQ) pure or adsorbed on silica, alumina and large pore zeolites (H-BEA) was carried out over five H-MCM-22 (MWW) samples differing by their Si/Al ratio and their external surface area.
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m-Xylene transformation over H-MCM-22 zeolite. 2. Method for determining the catalytic role of the three different pore systems
S. Laforge,D. Martin,M. Guisnet +2 more
TL;DR: A series of treatments were applied to selectively deactivate the acid sites of the supercages or of the external hemicages of a MCM-22 zeolite sample.
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