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。
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 gas-phase 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.
作者
王刚
董佩文
刘芳
曾敏
张群力
段之殷
解国珍
WANG Gang;DONG Pei-wen;LIU Fang;ZENG Min;ZHANG Qun-li;DUAN Zhi-yin;XIE Guo-zhen(School of Environment and Energy Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Key Laboratory of Thermo-Fluid Science and Engineering,Ministry of Education,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《有色金属（冶炼部分）》
CAS
北大核心
2020年第12期75-79,共5页
Nonferrous Metals（Extractive Metallurgy)
基金
国家自然科学基金资助项目(51908020)
北京建筑大学市属高校基本科研业务费专项资金资助项目(X18105)。
关键词
气相异辛醇
溴化锂溶液
表面张力
传质
gas-phase 2EH(2-ethyl-1-hexanol)
lithium bromide solution
surface tension
mass transfer
