【摘要】 采用圆盘塔研究了F₂₂在碱液中的分解速率。实验结果表明:F₂₂在碱液中的吸收过程是属于增大因子β>1的缓慢反应过程,分离所得10%NaOH与F₂₂反应的表观一级速率常数约在10^-3 1/S数量级,此速率常数随温度增高而上升。鉴于填料塔中流功膜的厚度很薄,仅为10^-4m的数量级,从而满足k₁ v/k₂《1的条件。于是,流功膜中发生的分解反应相对于传质过程可忽略,即可视为反应可忽略的物理吸收过程。此物理溶解的F₂₂在流经贮槽过程中与碱液分解反应完毕。此填料塔中物理吸收串联贮槽反应的模型与实际生产测定的F₂₂分解损失量相一致。可见,本文提出的分解模型是真实的。更多还原

【Abstract】 The rate of F₂₂ （Freon-22） decomposition in alkaline solution has been studied by means of discs column.Experimental results show that the absorption is a slow reaction process in which the enhancement factor is less than unity and its apparent first order rate constant of the Freon-22 separated from 10% NaOH solution is about the order of 10^-3 1/s. This rate constant increases in value with the temperature.The thickness, v, of the flow-film in the column is very thin, merely of the order of 10^-4 m, and it would fit the condition of k₁ v/k_L（?）1. Hence, the decomposition reaction occurred with respect to mass transfer is negligible. In other words, the absorption process may be taken into consideration as a physical absorption and the F₂₂ physically dissolved would decompose completely during its flowing in the tank.The model, involving the whole system of physical absorption in conjunction with the reaction in the tank, was checked with the production data carried out in a plant for its validity and it is found that the amount of F₂₂ loss was comparable. Obviously, the decomposition model recommended here is a good approximation to the truth.更多还原