论文部分内容阅读
本文研究了在pH 6—10、温度130—170℃条件下元素硫在水溶液中的歧化反应,确定了反应式为4S+6OH~-→2S~(2-)+S_2O_3~(2-)+3H_2O.参考了伴有化学反应的相间传质模型,本文中导出伴有快速化学反应的相间传质模型,即-In(1-a)=k_tt.在pH6—7.5范围内进行动力学测定所得结果与该模型相符,且发现此歧化的化学反应速度与〔OH~-〕成正比,求得表观反应活化能为24.0千卡/克分子.同时,还研究了Cu~(2+)对元素硫在水溶液中歧化反应的影响.
In this paper, the disproportionation reaction of elemental sulfur in aqueous solution at pH 6-10 and temperature of 130-170 ℃ was studied. The reaction scheme of 4S + 6OH ~ - → 2S ~ (2 +) + S_2O_3 ~ (2 -) + 3H_2O. With reference to the interphase mass transfer model with chemical reaction, an interphase mass transfer model with rapid chemical reaction is derived in this paper, ie -In (1-a) = k_tt. Kinetic determination at pH6-7.5 The results are consistent with the model and the chemical reaction rate of this disproportionation is found to be proportional to [OH ~ -], and the apparent activation energy is found to be 24.0 kcal / mol. At the same time, Cu ~ (2+) Effect of elemental sulfur disproportionation reaction in aqueous solution.