CAJ | 학술논문

膜吸收法在大型工业燃煤电厂二氧化碳（CO2）捕集方面具有很好的应用前景，但烟气组分对该技术效果影响还有待进一步研究。本文以单乙醇胺（MEA）为吸收剂，开展了疏水性聚丙烯（PP）中空纤维膜组件分离模拟烟气中的 CO2的实验研究，考察了吸收操作条件以及燃煤烟气中水汽和 SO2对膜组件吸收效率的影响。结果表明，试验的最佳液气比为24 L/m3；MEA的浓度为0.6 mol/L；膜组件进口的温度变化对吸收效率基本没有影响；CO2的浓度在10%～20%内变动对吸收效率影响不大。与CO2相比，SO2会优先发生吸收作用，而水汽则会吸附在聚丙烯中空纤维膜组件的孔壁上，产生毛细管凝聚现象，阻塞CO2的渗透吸收。
막흡수법재대형공업연매전엄이양화탄（CO2）포집방면구유흔호적응용전경，단연기조분대해기술효과영향환유대진일보연구。본문이단을순알（MEA）위흡수제，개전료소수성취병희（PP）중공섬유막조건분리모의연기중적 CO2적실험연구，고찰료흡수조작조건이급연매연기중수기화 SO2대막조건흡수효솔적영향。결과표명，시험적최가액기비위24 L/m3；MEA적농도위0.6 mol/L；막조건진구적온도변화대흡수효솔기본몰유영향；CO2적농도재10%～20%내변동대흡수효솔영향불대。여CO2상비，SO2회우선발생흡수작용，이수기칙회흡부재취병희중공섬유막조건적공벽상，산생모세관응취현상，조새CO2적삼투흡수。
This research presented separation of CO2 from flue gas by polypropylene(PP) hollow fiber membrane contactors,using aqueous solution of monoethanolamine (MEA) as absorption solvents. Effects of operating conditions,water vapor and SO2 on the performance and integrity of the membrane were investigated. The results showed that the best liquid-gas ratio was 24 L/m3,the concentration of MEA was 0.6 mol/L and temperature at the contactor entrance had little effect on absorption efficiency. The concentration of CO2 had little effect on absorption efficiency when the concentration was in the range of 10%-20%. The adsorption of SO2 is prior to CO2,but it isn’t obvious for the low concentration of SO2. Adsorption of water vapor on the hole walls of membrane contactors forms capillary condensation,preventing the penetration of CO2.