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

The non-isothermal desorption of water on alkali-metal cation-exchanged X-type zeolites was investigated by means of temperature-programmed diffuse reflection infrared Fourier transform spectroscopy (TP-DRIFTS). Based on the areas under the DRIFT spectra recorded at temperature intervals of 10 K, th...

Full description

Saved in:
Bibliographic Details
Published in:Thermochimica acta 2000-10, Vol.361 (1), p.61-68
Main Authors: Beta, I.A, Böhlig, H, Hunger, B
Format: Article
Language:English
Subjects:
Adsorption complexes
Alkali-metal cation-exchanged X-type zeolites
Chemistry
Diffuse reflection infrared Fourier transform spectroscopy (DRIFTS)
Exact sciences and technology
General and physical chemistry
Ion-exchange
Non-isothermal desorption
Surface physical chemistry
Water
Zeolites: preparations and properties
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The non-isothermal desorption of water on alkali-metal cation-exchanged X-type zeolites was investigated by means of temperature-programmed diffuse reflection infrared Fourier transform spectroscopy (TP-DRIFTS). Based on the areas under the DRIFT spectra recorded at temperature intervals of 10 K, the desorption profiles could be calculated. Their shape is principally identical to the desorption curves obtained by conventional TPD (EGD/EGA). Using a numerical regularisation method, desorption energy distribution functions have been calculated. The assignment of several characteristic bands to differently bonded water molecules and explanations for certain observed trends have been given.
ISSN:0040-6031
1872-762X
DOI:10.1016/S0040-6031(00)00547-5