Dissolution Kinetics of Sphalerite with Hydrogen Peroxide in Sulphuric Acid Medium
Yükleniyor...
Dosyalar
Tarih
2006
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Science Sa
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
The kinetics of dissolution of sphalerite with hydrogen peroxide in sulphuric acid solution was investigated. The influence of stirring speed (0-600rpm), dissolution temperature (10-60 degrees C), sulphuric acid concentration (0.5-6.0M), hydrogen peroxide concentration (0.1-6M), and particle size were studied. The dissolution kinetics was found to follow a shrinking-core model, with the surface chemical reaction as the rate-determining step. This finding is in concordance with the activation energy of 43 kJ/mol and a linear relationship between the rate constant and the reciprocal of particle size. Increasing concentrations of sulphuric acid and hydrogen peroxide have a positive effect on the dissolution of sphalerite, and orders of reaction of 0.35 and 0.48 were established with respect to sulphuric acid and hydrogen peroxide concentrations, respectively. Stirring speed had no effect on the rate of sphalerite dissolution.
Açıklama
Anahtar Kelimeler
Sphalerite, Hydrogen peroxide, Dissolution, Kinetic model
Kaynak
Chemical Engineering Journal
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
123
Sayı
Künye
Aydoğan, S., (2006). Dissolution Kinetics of Sphalerite with Hydrogen Peroxide in Sulphuric Acid Medium. Chemical Engineering Journal, (123), 65-70. Doi: 10.1016/j.cej.2006.07.001
