Abstract: Based on the modified surface film renewal model, a mathematical model for the liquid phase mass transfer accompanied by a 1st-order irreversible chemical reaction is derived, i. e. A discussion of the "Chemical Method" used for the determination of inter-facial area is presented. In applying this model, k1=2 is being taken as the condition for the absorption process approaching to steady state, the concept for the time of reaction penetrating through is proposed. If the depth where the relative solute concentration be degraded to 0.01 is taken as the thickness of the reaction zone ,an expression for calculating is derived. Moreover, a process for calculating the interfacial area and the frequencies of surface renewal by this model is also suggested. Based on the procedure proposed, some data taken from the literature are treated, and the results are compared with that from the Danckwerts model.

摘要： 本文将修正的表面膜更新模型用于具有一级不可逆化学反应的液相传质,导得了如下的数学模型: 本文对于用“化学法”测定相际面积的问题作了分析,提出了反应穿透时间θ_K和溶质反应几尽的渗透深度σ_K的概念;并以k_1θ=2作为吸收已趋稳定状态的条件,拟定了一个计算相际面积和表面更新频率的方法。还用这方法处理了一些文献数据,并与Danckwerts模型作了比较。