Volatilisation kinetics of Sb 2 S 3 from PbS

Abstract

The kinetics of volatilisation of Sb₂S₃ from PbS–Sb₂S₃ melt was investigated by measuring volatilisation ratio of antimony. A theoretical model was set up to calculate the overall rate constant and the mass transport coefficient in gas phase. It has been demonstrated that the volatilisation process displays first order kinetics with respect to the concentration of Sb₂S₃ in the melt. The apparent activation energy for the process is found to be 81·18 kJ mol⁻¹. The effect of concentration of Sb₂S₃, temperature and carrier gas flow rate on the volatilisation rate was discussed. The activity of Sb₂S₃ shows positive deviation from Raoult's law because the complex sulphides may be formed between Sb₂S₃ and PbS.

Keywords

VOLATILISATION SB2S3 PBS-SB2S3 MELT

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Volatilisation kinetics of Sb 2 S 3 from PbS–Sb 2 S 3 melt

Abstract

Keywords

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References