| 膜接触器分离混合气中二氧化碳的研究 |
| 摘要点击 1069 全文点击 1804 投稿时间：2002-10-17 修订日期：2002-12-17 |
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| 中文关键词 CO2脱除率 CO2传质系数 聚丙烯中空纤维膜 膜接触器 |
| 英文关键词 carbon dioxide removal ratio hollow fiber polypropylene membrane membrane contactor mass transfer coefficient of carbon dioxide |
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| 中文摘要 |
| 研究了聚丙烯纤维微孔膜(HFPPM)膜接触器分离CO2/N2混合气中CO2技术,考察了吸收剂的种类、HFPPM的透气率和流程等因素对CO2分离效率的影响.结果表明,液相中传质在分离过程中占主导作用;3种吸收剂的性能依次为单乙醇胺(MEA)＞NaOH＞二乙醇胺(DEA)以浓度2.5 mol·L-1、流速40～160 L·h-1的MEA水溶液处理浓度20%、流速0.5～1.0 m3·h-1的CO2/N2混合气时,CO2的脱除率为95%～99.5%,CO2的传质系数为4.5～6.8×10-4m·s-1;透气率大的膜组件传质系数大,腔流程中CO2的脱除率比壳流程高30%以上. |
| 英文摘要 |
| In this paper, membrane contactor made of hydrophobic hollow fiber polypropylene porous membrane (HFPPM) was used for separating carbon dioxide (CO2) from CO2/N2 mixtures. The effects of absorbents, concentration and flow rate of feeding gas and absorbent solution, lumen/shell side processes and gas permeability of HFPPM(P)on the CO2 absorption efficiency were investigated. It was found that the absorption efficiency of three absorbents ranged in order of ethanolamine >sodium hydroxide> diethanol amine. For CO2/N2 mixture of cin=20 % and vin = 0.5～1.0 m3·h-1, and MEA solution of cMEA=2.5 mol·L-1 and vL= 40～160L·h-1, the removal efficiencies of CO2 (η) and the mass transport coefficients (K) was 9.5%～ 99.5% and 4.5～6.8×10-4 m·s-1 respectively. K of the modules made of HFPPM with larger P was relatively larger. η in lumen process was 30% larger than that in shell process. |
