Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
DEHYDRATION KINETICS OF ULEXITE FROM THERMOGRAVIMETRIC DATA
Autore:
TUNC M; ERSAHAN H; YAPICI S; COLAK S;
Indirizzi:
VAN YUZUNCU YIL UNIV,FAC SCI,DEPT CHEM VAN TURKEY ATATURK UNIV,FAC ENGN,DEPT CHEM ENGN TR-25240 ERZURUM TURKEY
Titolo Testata:
Journal of thermal analysis
fascicolo: 2, volume: 48, anno: 1997,
pagine: 403 - 411
SICI:
0368-4466(1997)48:2<403:DKOUFT>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
THERMAL-DECOMPOSITION;
Keywords:
DEHYDRATION; DEHYDRATION KINETICS; THERMAL DECOMPOSITION; THERMOGRAVIMETRY; ULEXITE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
M. Tunc et al., "DEHYDRATION KINETICS OF ULEXITE FROM THERMOGRAVIMETRIC DATA", Journal of thermal analysis, 48(2), 1997, pp. 403-411

Abstract

In the present study, the kinetic parameters of the thermal decomposition of ulexite were investigated by using TGA data. For the kinetic analysis, the Suzuki and Coats-Redfern methods were applied. It was determined that the process fits a first-order kinetic model, and the value of the activation energies and frequency factors decreased with decreasing particle size, which can be attributed to the increasing particle internal resistance to the escape of water as the grain size increases. The activation energy values were found to be 47.34-60.01 kJ mol(-1) for region I and 0.225-1.796 kT mol(-1) for region II for the range of particle size fraction used. The frequency factors were calculated to be 9821.8-524.9 s(-1) for region I and 3.05x10(-4)-2.807x10(-5) for region II for the same conditions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/07/20 alle ore 03:05:24