根据双膜理论，对于气液相传质体系，采用两相主体的浓度的某种差值表示总推动力而写出传质速率方程，其中的系数即为总传质系数。它的倒数为总阻力，为气膜和液膜传质阻力之和。
在相同的总碱度下，再生废碱液的吸收速率(或传质系数)与OH _ -的浓度直接相关。
Under the same total alkalinity, the absorbing rate of the regenerated spent caustic liquid (or mass transfer factor) is directly related with the OH concentration.
结果表明：吸附温度升高时，总传质系数减小，吸附带长度增大。
The results show that overall mass transfer coefficient (decreases) but length of adsorption zone increases with an increase in adsorption temperature.
建立了XDA - 1树脂柱吸附茶多酚过程的传质模型，并根据该模型分别计算了不同操作条件下相应的物质总传质系数及传质区长度。
Adsorption model for TP mass transfer with XDA-1 resins was set up and the height of mass transfer zone and total mass transfer coefficient in different operation conditions were calculated.
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