The use of the consecutive adsorption of pyridine bases and carbon monoxide in the IR spectroscopic study of the accessibility of acid sites in microporous/mesoporous materials |
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Authors: | N S Nesterenko F Thibault-Starzyk V Montouilliout V V Yushchenko C Fernandez J-P Gilson F Fajula I I Ivanova |
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Institution: | (1) Moscow State University, Moscow, 119899, Russia;(2) LCS, UMR 6506 CNRS-ENSI, Caen, France;(3) LMCCCO, UMR 5618 CNRS-ENSCM, Montpellier, France |
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Abstract: | A new approach to the evaluation of the accessibility of acid sites in microporous/mesoporous materials is developed and tested
using a series of dealuminated mordenites. This approach is based on an IR-spectroscopic study of the consecutive adsorption
of substituted alkylpyridines (pyridine, 2,4,6-trimethylpyridine, and 2,4,6-triethylpyridine) and carbon monoxide. This method
allowed us to determine the strength and number of acid sites with various degrees of accessibility. The adsorption of 2,4,6-triethylpyridine
on various types of materials is studied. The extinction coefficients of alkylpyridines are determined using a McBain balance
placed in a cell for IR-spectroscopic measurements.
Original Russian Text N.S. Nesterenko, F. Thibault-Starzyk, V. Montouilliout, V.V. Yushchenko, C. Fernandez, J.-P. Gilson,
F. Fajula, I.I. Ivanova, 2006, published in Kinetika i Kataliz, 2006, Vol. 47, No. 1, pp. 45–53. |
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