Application of pilot-scale membrane contactor hybrid system for removal of carbon dioxide from flue gas
Application of pilot-scale membrane contactor hybrid system for removal of carbon dioxide from flue gas
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DOI：
10.1016/j.memsci.2004.08.037
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发表时间：
2005-07
影响因子：
9.5
通讯作者：
Soon-Hwa Yeon;Ki-Sub Lee;B. Sea;Yu-In Park;Kew-Ho Lee
中科院分区：
文献类型：
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作者：
Soon-Hwa Yeon;Ki-Sub Lee;B. Sea;Yu-In Park;Kew-Ho Lee
采用中试规模的膜接触器混合工艺回收烟气中的二氧化碳。采用多孔聚偏氟乙烯(PVDF)中空纤维组件作为膜接触器，并与传统填充塔进行了性能比较。以一乙醇胺(MEA)和三乙醇胺(TEA)溶液为吸收剂，用气体吸收塔脱除烟气中的二氧化碳。然后，用蒸汽热汽提塔回收吸收液中的二氧化碳，并回收反萃出的吸收液。膜接触器增加了气液接触器的有效面积和传质系数，因此复合式工艺比常规吸收塔具有更高的脱碳效率。具有不对称孔结构的PVDF组件具有稳定的气液界面，膜接触器的单位体积CO2吸收速率是填充塔的2.7倍。此外，膜接触器复合工艺成功运行了80h，保持了较高的CO2脱除效率，达到90%以上。从电学角度对气体吸收系统进行了评价。
A pilot-scale membrane contactor hybrid process was applied to recover CO2from the flue gas. Porous polyvinylidenefluoride (PVDF) hollow fiber module was used as membrane contactor and its performance was compared with a conventional packed column. The CO2from the flue gas was removed by the gas absorbers using monoethanolamine (MEA) and triethanolamine (TEA) solution as the absorbent. Then, the CO2was recovered from the absorbent by the thermal stripping tower with steam and the stripped absorbent was recycled. The membrane contactor increased the available gas–liquid contactor area and mass transfer coefficient, and thus the hybrid process showed a higher CO2removal efficiency than the conventional absorption tower. PVDF module with an asymmetric pore structure showed a stable gas–liquid interface, and the CO2absorption rate per unit volume of the membrane contactor was 2.7 times higher than that of the packed column. In addition, the membrane contactor hybrid process was successfully operated for 80h maintaining a greater CO2removal efficiency of above 90%. The gas absorption systems were evaluated from the viewpoint of electricity.