基于中空纤维膜接触器的氨水吸收CO_(2)的膜润湿性能模拟研究  

Membrane Wetting Performance Simulation Study of Ammonia Water Absorption of CO_(2)Based on Hollow Fiber Membrane Contactor

作　　者：张志恒 牟小轩 李深奥 夏杰成 竺新波 王甫 ZHANG Zhiheng;MU Xiaoxuan;LI Shen’ao;XIA Jiecheng;ZHU Xinbo;WANG Fu(College of Maritime and Transportation,Ningbo University,Ningbo 315800,China)

机构地区：[1]宁波大学海运学院,浙江宁波315800

出　　处：《化学反应工程与工艺》2024年第4期357-369,共13页Chemical Reaction Engineering and Technology

基　　金：国家自然科学基金面上项目(52276010)。

摘　　要：膜接触器吸收(膜吸收)技术结合了膜分离与气体吸收的优点,在碳捕集技术中应用潜力巨大,但膜润湿是制约其发展和应用的主要障碍之一。着重研究了基于中空纤维膜接触器的氨水吸收CO_(2)过程中的膜润湿问题。本工作通过引入润湿分数的概念,利用COMSOL建立了润湿状态的二维稳态非润湿膜吸收模型,考察了不同操作参数下膜润湿对CO_(2)吸收性能的影响。结果显示膜润湿对传质性能具有显著的影响,完全润湿条件下的CO_(2)脱除效率和传质速率相比非润湿条件分别下降了38.5%和32.5%;气相参数的变化对非润湿状态的影响更大,而液相参数则对润湿状态的影响更明显。The membrane contactor absorption(membrane absorption)technology combines the advantages of membrane separation and gas absorption,exhibiting significant potential in carbon capture technology.However,membrane wetting is a significant obstacle restricting its development and application.The wetting of the membrane in the process of CO_(2) absorption by ammonia water based on hollow fiber membrane contactor is emphatically studied.In this paper,by introducing the concept of wetting fraction,a two-dimensional stable non-wetting membrane absorption model was established by COMSOL,and the influence of membrane wetting on the CO_(2) absorption performance under different operating parameters was investigated.The results indicate that membrane wetting significantly affects mass transfer performance,with CO_(2) removal efficiency and mass transfer rate decreasing by 38.5%and 32.5%,respectively,under fully wetted conditions compared to non-wetted conditions.Changes in gas phase parameters have a greater impact on the non-wetted state,while liquid phase parameters have a more pronounced effect on the wetted state.

关 键 词：碳捕集 氨水 中空纤维膜接触器 膜润湿 数值模拟 

分 类 号：TQ021.4[化学工程] TQ018