Citation
Ia. Beta et al., Investigation of the non-isothermal water desorption on alkali-metal cation-exchanged X-type zeolites: a temperature-programmed diffuse reflection infrared Fourier transform spectroscopic (TP-DRIFTS) study, THERMOC ACT, 361(1-2), 2000, pp. 61-68
Citations number
29
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
THERMOCHIMICA ACTA
ISSN journal
00406031
→ ACNP
Volume
361
Issue
1-2
Year of publication
2000
Pages
61 - 68
Database
ISI
SICI code
0040-6031(20001003)361:1-2<61:IOTNWD>2.0.ZU;2-9
Abstract
The non-isothermal desorption of water on alkali-metal cation-exchanged X-t
ype zeolites was investigated by means of temperature-programmed diffuse re
flection infrared Fourier transform spectroscopy (TP-DRIFTS), Based on the
areas under the DRIFT spectra recorded at temperature intervals of 10 K, th
e desorption profiles could be calculated. Their shape is principally ident
ical to the desorption curves obtained by conventional TPD (ECD/EGA). Using
a numerical regularisation method, desorption energy distribution function
s have been calculated. The assignment of several characteristic bands to d
ifferently bonded water molecules :ind explanations for certain observed tr
ends have been given. (C) 2000 Elsevier Science B.V. All rights reserved.