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

被引：9

作者：

Beta, IA ^{[1
]}

Böhlig, H ^{[1
]}

Hunger, B ^{[1
]}

机构：

[1] Univ Leipzig, Wilhelm Ostwald Inst Phys & Theoret Chem, D-04103 Leipzig, Germany

来源：

THERMOCHIMICA ACTA | 2000年 / 361卷 / 1-2期

关键词：

alkali-metal cation-exchanged X-type zeolites; water; diffuse reflection infrared Fourier transform spectroscopy (DRIFTS); non-isothermal desorption; adsorption complexes;

D O I：

10.1016/S0040-6031(00)00547-5

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

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 (ECD/EGA). Using a numerical regularisation method, desorption energy distribution functions have been calculated. The assignment of several characteristic bands to differently bonded water molecules :ind explanations for certain observed trends have been given. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：61 / 68

页数：8

共 29 条

[1] INFRARED SPECTROSCOPIC INVESTIGATIONS OF ZEOLITES AND ADSORBED MOLECULES .I. STRUCTURAL OH GROUPS [J].

ANGELL, CL ;

SCHAFFER, PC .

JOURNAL OF PHYSICAL CHEMISTRY, 1965, 69 (10) :3463-&

[2] ASSIGNMENT OF NOVEL BANDS OBSERVED IN THE NEAR-INFRARED SPECTRA OF SHALLOW-BED TREATED H-Y AND H-ZSM-5 ZEOLITES [J].

BECK, K ;

PFEIFER, H ;

STAUDTE, B .

MICROPOROUS MATERIALS, 1993, 2 (01) :1-6

[3] SIMULTANEOUS ANALYSIS OF GAS-PHASE AND INTERMEDIATES IN THE HYDROGENATION OF CARBON OXIDES BY DRIFTS [J].

BENITEZ, JJ ;

CARRIZOSA, I ;

ODRIOZOLA, JA .

APPLIED SPECTROSCOPY, 1993, 47 (11) :1760-1766

[4] AN INFRARED SPECTROSCOPIC STUDY OF ADSORPTION OF WATER AND CARBON DIOXIDE BY LINDE MILECULAR SIEVE X [J].

BERTSCH, L ;

HABGOOD, HW .

JOURNAL OF PHYSICAL CHEMISTRY, 1963, 67 (08) :1621-&

[5]

Breck D. W., 1974, ZEOLITE MOL SIEVES S

[6] In situ temperature-programmed diffuse reflectance infrared Fourier transform spectroscopy (TPDRIFTS) of V2O5/TiO2 catalysts [J].

Centeno, MA ;

Benitez, JJ ;

Malet, P ;

Carrizosa, I ;

Odriozola, JA .

APPLIED SPECTROSCOPY, 1997, 51 (03) :416-422

[7] TEMPERATURE PROGRAMMED DESORPTION OF SORBATES FROM ZEOLITES .2. NEW ANALYTICAL METHOD TESTED ON DEHYDRATION OF DEALUMINATED Y-ZEOLITES [J].

DIMA, E ;

REES, LVC .

ZEOLITES, 1987, 7 (03) :219-227

[8] AN APPROACH TO THE KINETICS OF WATER DESORPTION FROM A-ZEOLITES .1. ISOTHERMAL AND NON-ISOTHERMAL DESORPTION [J].

DONDUR, V ;

VUCELIC, D .

THERMOCHIMICA ACTA, 1983, 68 (01) :91-99

[9] Charge sensitivity analysis of intrinsic basicity of faujasite-type zeolites using the electronegativity equalization method (EEM) [J].

Heidler, R ;

Janssens, GOA ;

Mortier, WJ ;

Schoonheydt, RA .

JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (50) :19728-19734

[10] STUDIES ON THE TEMPERATURE PROGRAMMED DESORPTION OF WATER FROM CONAX ZEOLITES [J].

HOFFMANN, J ;

HUNGER, B ;

DOMBROWSKI, D ;

BAUERMEISTER, R .

JOURNAL OF THERMAL ANALYSIS, 1990, 36 (04) :1487-1494

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