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Titolo:
A SEMIEMPIRICAL KINETIC-MODEL FOR DISSOLUTION OF COLEMANITE IN AQUEOUS CH3COOH SOLUTIONS
Autore:
OZMETIN C; KOCAKERIM MM; YAPICI S; YARTASI A;
Indirizzi:
ATATURK UNIV,FAC ENGN,DEPT CHEM ENGN ERZURUM 25240 TURKEY ATATURK UNIV,FAC ENGN,DEPT CHEM ENGN ERZURUM 25240 TURKEY
Titolo Testata:
Industrial & engineering chemistry research
fascicolo: 7, volume: 35, anno: 1996,
pagine: 2355 - 2359
SICI:
0888-5885(1996)35:7<2355:ASKFDO>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
21
Recensione:
Indirizzi per estratti:
Citazione:
C. Ozmetin et al., "A SEMIEMPIRICAL KINETIC-MODEL FOR DISSOLUTION OF COLEMANITE IN AQUEOUS CH3COOH SOLUTIONS", Industrial & engineering chemistry research, 35(7), 1996, pp. 2355-2359

Abstract

In this study the dissolution of Colemanite in aqueous acetic acid solutions was investigated in a batch reactor employing the parameters of particle size, solid-to-liquid ratio, and temperature. It was found that the dissolution rate increases with increasing temperature and decreasing solid-to-liquid ratio and particle size. The most effective parameter was particle size with a power of -1.420 after temperature and solid-to-liquid had less effect than the other parameters. The conversion rate increased up to 3.365 M acid concentration and then decreased with increasing acid concentration. No important effect of stirringspeed was observed. The activation energy of the process was determined to be 51.490 kJ mol(-1). It was determined by graphical and statistical methods that the reaction fits a model in the form of -ln(1 - X) = kt. The following semiempirical mathematical model, which expresses the process well, was established: -ln(1 - X) = 56 664(D)(-1.42)(S/L)(-0.270) exp(-6193.0/T)t, where X is the conversion fraction, D the particle size, S/L, the solid-to-liquid ratio, and T the reaction temperature.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 12:45:08