Kinetics of the chlorination of pyrite in aqueous suspension

Desulfurization kinetics and mineral phase evolution of bauxite water slurry (BWS) electrolysis

“…The unreacted shrinking core model (Bayrakçeken et al, 1990;Karaca et al, 1997;Prasassarakich and Thaweesri, 1996;Yang and Qiu, 1998) was employed to confirm the apparent activation energy of sulfur removal and controlling step for BWS electrolysis in this paper. The liquid-solid reaction model was expressed by Eq.…”

99/01233 The removal of organic sulfur from two Turkish lignites by chlorinolysis

“…As seen in these figures, the reduction of organic sulfur increases with increasing temperature, but changes in temperature between 40 • C and 70 • C appear to have little effect on the rate. This may be explained by considering such competing effects as an increase in the reaction rate and a decrease in the chlorine solubility with increasing temperature 18,26 . However, the removal rate of organic sulfur under similar reaction conditions was influenced by increase in temperature more significantly in the water medium then in the water-carbon tetrachloride medium.…”

Coal desulfurization by bacterial treatment and column flotation. Final report

“…Chlorination of coal consists of reacting coal with chlorine gas, usually dissolved in methyl chloroform, at near ambient temperature. (Hsu et al, 1977;Cho, 1989;Bayrakceken et al, 1990) This is primarily effective for removing pyritic sulfur, although it is reported to be capable of removing up to 40% of the organic sulfur as well. A drawback to this method is that in the course of chlorination, a great deal of chlorine combines with the coal, reaching levels as high as 20% by weight.…”