【摘要】 通过溴化锂溶液传质性能测试装置,研究了气相异辛醇添加量对溴化锂溶液表面张力的影响,以及在降膜吸收的过程中气相异辛醇的添加量和溶液的流量对传质系数的影响。结果表明:气相异辛醇的添加对溴化锂溶液的表面张力和传质系数均有明显影响,表面张力随异辛醇添加量的增加而减小,传质系数的变化规律与其相反。气相异辛醇分子在溶液表面的吸附作用降低了溶液表面张力梯度,从而引起的Marangoni效应,是对流传质强化比增大的重要原因。更多还原

【Abstract】 Effect of gas-phase 2EH(2-ethyl-1-hexanol)additive amount on surface tension of LiBr(lithium bromide solution)and influences of gas-phase 2EH additive amount and solution flow rate on mass transfer coefficient during falling film absorption process were studied by setting up a test device for mass transfer performance of LiBr.The experimental results show that addition of gas-phase 2EH has a significant effect on surface tension and mass transfer coefficient of LiBr.Surface tension drops with increase of additive amount of gasphase 2EH,but mass transfer coefficient augments with increase of additive amount of gas-phase 2EH.Adsorption of gas-phase 2EH molecules on solution surface reduces solution surface tension gradient and causes the Marangoni effect,which is an important reason for increase of convective mass transfer enhancement ratio.更多还原