【摘要】 本文研究了氧化气氛中硫化锑的挥发,提出了以气相膜中氧气的传质和界面化学反应为速率限制环节的动力学模型,导出了计算硫化锑在含氧气流中挥发速率的方程.更多还原

【Abstract】 The vaporization of Sb₂S₃ in an oxygen-containing gas stream was investigated and the mathematical model of this process was established on the basis that the transfer of oxygen across gas film and chemical reactions on the surface of melted Sb₂S₃ are the rate-determining steps.The mechanism of vaporization of Sb₂S₃ is suggested as follows: {(Sb₂S_3（1）)（2SbS）_g+1/2S₂ O_bulk^cO_{2（surface）}^s 2Sb₂S_3（1）+gO₂^s2Sb₂O_3（1）+6SO₂ SbS_g+O₂^sSb₁+SO₂ The equation to describe the overall vaporization rate of Sb₂S₃ was derived to be V=k_aaSb₂S₃+[2/9(M_Sb2S3-M_Sb2O3kc-M_Sbkd](Sk_gP_O2^c)/（RT（k_c+k_d+Sk_g）） for the vaporization in the stream with oxygen content.The rate constants,k_a、k_c and k_d,were obtained by regression from experimental data lgk_a=6.759-（8285）/T lgk_c=5.173-（4303）/T lgk_d=9.366-（11000）/T更多还原