分散液相强化微溶气体吸收的研究

在气升式搅拌反应器中,利用水对微溶气体CO2(常压和室温条件)的物理吸收过程,考察加入辛醇(有机分散相)对传质过程中体积传质系数和增强因子的影响。研究辛醇加入体积分数(1%—5%)、搅拌速率(200—700 r/min)、气体流速(350—700 L/min)变化对吸收效果的影响,用插值函数微商法确定体积传质系数。结果表明,向水体系中加入少量辛醇可以明显改善吸收效果,体积传质系数随辛醇加入体积分数的增加呈现先增加后减小的趋势,当辛醇加入的体积分数为4%左右时吸收效果最好。增强因子与CO2分配系数、扩散系数有关,与吸收效果呈线性关系,最大增强因子为2.76。

Enhancement of tiny soluble gas absorption by dispersed liquid phase

In the kettle-type stirred-tank reactor,the effects of volume mass transfer coefficient KLa and enhancement factor E were studied under the normal pressure and at normal temperature in the presence of the dispersed liquid phase(1-octanol) by using the slightly soluble gas(CO2) physical absorption process.KLa was evaluated by the interpolation-function derivative law at different 1-octanol volume fraction(1%-5%),agitation rates(200-700 r/m),aeration rates(350-700 L/min).The result indicates that the gas abso...