摘要
碳捕集技术是减少温室气体排放的有效手段。本文利用高速摄像系统研究了小尺度矩形直通道内一乙醇胺吸收混合气体内CO_(2)的过程,探索了泰勒气泡的流动特性和液相泄漏流的量化分析,旨在揭示小尺度矩形直通道内CO_(2)吸收过程的传质特性。提出了体积修正因子的概念,量化分析了液相流量增大时泄漏流的泄漏程度,考察了不同一乙醇胺溶液浓度(3%,5%,10%)和液相流量(15∼70 mL·min^(-1))对泄漏流的影响。结果表明:适当的泄漏流对CO_(2)的吸收传质起到促进作用;气泡行进速度的提升有助于加大气泡周围的浓度梯度,从而促进气液相间传质。
Carbon capture technology is an effective strategy to reduce greenhouse gas emissions.In this study,a high-speed camera system was used to investigate the process of absorption of CO_(2) in a mixed gas by an ethanolamine within a small-scale rectangular straight channel.The flow characteristics of Taylor bubbles and the quantitative analysis of liquid leakage flow were explored,aiming to discover the mass transfer characteristics of CO_(2) absorption process in a small-scale rectangular straight channel.The concept of volume correction factor was proposed.The leakage degree of leakage flow when the liquid flow rate increases was quantitatively analyzed.The effects of different monoethanolamine solution concentrations(3%,5%,10%)and liquid flow rates(15∼70 mL·min^(-1))on leakage flow were investigated.The results indicated that during the gas-liquid flow process,appropriate leakage flow promoted the absorption and mass transfer of CO_(2).Additionally,an increase in bubble travel velocity was found to enhance the concentration gradient surrounding the bubble,thereby promoting mass transfer between the gas and liquid phases.
作者
柳叶
贾力
党超
孙晓哲
LIU Ye;JIA Li;DANG Chao;SUN Xiaozhe(Institute of Thermal Engineering,School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China;Beijing Key Laboratory of Flow and Heat Transfer of Phase Changing in Micro and Small Scale,Beijing 100044,China)
出处
《工程热物理学报》
北大核心
2026年第2期498-503,共6页
Journal of Engineering Thermophysics
基金
国家自然科学基金重点项目(No.52036001)。
关键词
小尺度矩形直通道
传质特性
气液两相流
体积修正因子
泄漏流
small-scale rectangular straight channel
mass transfer characteristics
gas-liquid twophase flow
volume correction factor
leakage flow
