外部扰动对TiO2-MDEA纳米流体吸收CO2影响的研究  

Effects of External Disturbances on CO Absorption by TiO-MDEA Nanofluids

作　　者：杨柳 孔成栋 张忠孝[1] 刘健[1] YANG Liu;KONG Chengdong;ZHANG Zhongxiao;LIU Jian(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《动力工程学报》2021年第2期160-166,共7页Journal of Chinese Society of Power Engineering

基　　金：国家重点研发计划资助项目(2017YFB0603403)。

摘　　要：采用"两步法"制备分散性良好的TiO2-MDEA纳米流体作为吸收剂,在鼓泡实验装置上进行CO2吸收实验。研究了纳米颗粒质量分数和粒径对纳米流体强化CO2吸收的影响,以及气体体积流量、电磁搅拌和超声振动3种外部扰动方式对强化效果的影响。结果表明:纳米流体主要通过阻止气泡聚并、增大有效反应面积来强化CO2吸收,并且强化效果与纳米颗粒质量分数和粒径相关,最佳强化值可达81.7%;增大气体体积流量会减弱纳米流体的强化效果,电磁搅拌在颗粒质量分数为0.08%左右时起促进作用,施加超声振动会显著抑制纳米流体的强化作用。TiO2-MDEA nanofluids with good dispersity were prepared by the two-step method to absorb CO2 in a bubbling reactor, so as to analyze the influence of the mass fraction and size of nanofluids on the enhancement of CO2 absorption and to study the effects of the following three external disturbances on the CO2 absorption enhanced by nanofluids, such as the gas velocity, electromagnetic stirring and ultrasonic vibration, etc. Results show that the enhancement of nanofluids on CO2 absorption is realized by preventing the bubble coalescence to increase the effective reaction area;the mass fraction and the size of nanoparticles can both influence the enhancement effect, and the optimal effect can reach 81.7%. High gas velocity would result in low enhancement effect, while the electromagnetic stirring can promote the enhancement when the mass fraction is around 0.08%. The ultrasonic vibration would significantly inhibit the enhancement of nanofluids.

关 键 词：纳米流体 CO2化学吸收 外部扰动 阻止气泡聚并机理 有效反应面积 

分 类 号：X511[环境科学与工程—环境工程]