混合醇胺的浸润性对膜吸收法中CO_2传质性能的影响
|
摘要
为了探究混合醇胺应用于膜吸收法时其对膜的浸润性以及CO_2传质性能的影响,采用接触角试验和浸润试验,测定了2种混合醇胺——N-甲基二乙醇胺(MDEA)+一乙醇胺(MEA)和MDEA+三乙醇胺(TEA)对聚丙烯中空纤维膜的浸润特性和润湿速率,并通过吸收试验确定了不同润湿程度下的CO_2传质速率。结果表明:相同质量分数、溶质配比下,MDEA+TEA溶液对膜的浸润性要大于MDEA+MEA溶液,MDEA+TEA溶液的膜润湿速率大于MDEA+MEA溶液的膜润湿速率;同一混合醇胺对膜浸润性随溶质配比的增加而增大;对比试验结果表明,CO_2传质速率减小是由混合醇胺对膜浸润性引起的,膜润湿程度增大,混合醇胺CO_2传质速率减小。
To investigate the influence of wettability of mixed alcohol amine absorbents on the CO_2 mass transfer performance in membrane gas absorption process,the wetting properties and wetting rate of two mixed alcohol amine absorbents—MDEA(N-methyldiethanolamine)+ MEA(monoethanolamine)and MDEA+TEA(triethanolamine)on the polypropylene hollow fiber membrane were determined by contact angle test and soaking test,and the mass transfer rate of CO_2 under different wetting degrees was measured by absorption test.Results show that both the wetting property and wetting rate of MDEA+TEA on PP hollow fiber membrane are higher than that of MDEA+MEA at the same concentration and solute ratio.The wettability of the same mixed alcohol amine on PP hollow fiber membrane increases with rising solute ratio(w(MDEA)∶w(MEA)/w(TEA)).Comparative tests indicate that the decrease of CO_2 mass transfer rate is caused by the wettability of mixed alcohol amine on the membrane,and the higher the wettability is,the lower the CO_2 mass transfer rate would be.
To investigate the influence of wettability of mixed alcohol amine absorbents on the CO_2 mass transfer performance in membrane gas absorption process,the wetting properties and wetting rate of two mixed alcohol amine absorbents—MDEA(N-methyldiethanolamine)+ MEA(monoethanolamine)and MDEA+TEA(triethanolamine)on the polypropylene hollow fiber membrane were determined by contact angle test and soaking test,and the mass transfer rate of CO_2 under different wetting degrees was measured by absorption test.Results show that both the wetting property and wetting rate of MDEA+TEA on PP hollow fiber membrane are higher than that of MDEA+MEA at the same concentration and solute ratio.The wettability of the same mixed alcohol amine on PP hollow fiber membrane increases with rising solute ratio(w(MDEA)∶w(MEA)/w(TEA)).Comparative tests indicate that the decrease of CO_2 mass transfer rate is caused by the wettability of mixed alcohol amine on the membrane,and the higher the wettability is,the lower the CO_2 mass transfer rate would be.
引文
[1]瞿如敏,沙焱,陈浩,等.聚丙烯中空纤维膜组件分离烟气中的CO2[J].化工进展,2013,32(11):2778-2782.QU Rumin,SHA Yan,CHEN Hao,et al.Experimental study on separation of CO2 by polypropylene hollow fiber membrane contactor[J].Chemical Industry and Engineering Progress, 2013, 32(11):2778-2782.
[2]张卫风.中空纤维膜接触器分离燃煤烟气中二氧化碳的试验研究[D].杭州:浙江大学,2006.
[3]陈思铭,张永春,郭超,等.醇胺溶液吸收CO2的动力学研究进展[J].化工进展,2014,33(增刊1):1-13.CHEN Siming,ZHANG Yongchun,GUO Chao,et al.Reaction kinetics of absorption of carbon dioxide with alkanolamines[J].Chemical Industry and Engineering Progress,2014,33(Sup1):1-13.
[4]张亚萍,江金正,季芹芹,等.混合醇胺溶液吸收烟气中CO2[J].化工生产与技术,2012,19(1):22-24.ZHANG Yaping,JIANG Jinzheng,JI Qinqin,et al.Research on CO2absorption of flue gas in the mixed alcohol amine solutions[J].Chemical Production and Technology,2012,19(1):22-24.
[5]史建公,刘志坚,赵良英,等.二氧化碳有机胺吸收剂研究进展[J].中外能源,2014,19(9):16-25.SHI Jiangong,LIU Zhijian,ZHAO Liangying,et al.Advances in organic amine CO2 absorbent research[J].Sino-Global Energy,2014,19(9):16-25.
[6]湛志钢,周旭萍,徐齐胜,等.PZ/AEEA混合吸收剂脱碳性能研究[J].动力工程学报,2016,36(7):535-540.ZHAN Zhigang,ZHOU Xuping,XU Qisheng,et al.Research on CO2capture performance of PZ/AEEA blends[J].Journal of Chinese Society of Power Engineering,2016,36(7):535-540.
[7] L Yuexia,YU Xinhai,TU S T,et al.Wetting of polypropylene hollow fiber membrane contactors[J].Journal of Membrane Science,2010,362(1/2):444-452.
[8] MALEK A,LI K,TEO W K.Modeling of microporous hollow fiber membrane modules operated under partially wetted conditions[J].Industrial&Engineering Chemistry Research,1997,36(3):784-793.
[9] ZHANG Hongyan,WANG Rong,LIANG D T,et al.Theoretical and experimental studies of membrane wetting in the membrane gas-liquid contacting process for CO2absorption[J].Journal of Membrane Science,2008,308(1/2):162-170.
[10] WANG R,LI D F,ZHOU C,et al.Impact of DEA solutions with and without CO2 loading on porous polypropylene membranes intended for use as contactors[J].Journal of Membrane Science,2004,229(1/2):147-157.
[11]付东,钟智坤.二乙醇胺-N-甲基二乙醇胺-水溶液表面张力实验研究[J].化学学报,2010,68(12):1241-1246.FU Dong,ZHONG Zhikun.Experimental study on the surface tension of diethanolamine-N-methyldiethanolamine-water mixtures[J].Acta Chimica Sinica,2010,68(12):1241-1246.
[12]黎四芳,任铮伟,李盘生,等.MDEA-MEA混合有机胺水溶液吸收CO2[J].化工学报,1994,45(6):698-703.LI Sifang,REN Zhengwei,LI Pansheng,et al.Absorption of CO2 by aqueous MDEA-MEA solution[J].Journal of Chemical Industry and Engineering(China),1994,45(6):698-703.
[13] VAZQUEZ G,ALVAREZ E,NAVAZA J M,et al.Surface tension of binary mixtures of water+monoethanolamine and water+2-amino-2-methyl-1-propanol and tertiary mixtures of these amines with water from 25°C to 50°C[J].Journal of Chemical&Engineering Data,1997,42(1):57-59.
[14] AGUILA-HERNANDEZ J,TREJO A,GRACIAFADRIQUE J.Surface tension of aqueous solutions of alkanolamines:single amines,blended amines and systems with nonionic surfactants[J].Fluid Phase Equilibria,2001,185(1/2):165-175.
[15] LU Jiangang,ZHENG Youfei,CHENG Mindong.Wetting mechanism in mass transfer process of hydrophobic membrane gas absorption[J].Journal of Membrane Science,2008,308(1/2):180-190.
[16] KAMO J,HIRAI T,KAMADA K.Solvent-induced morphological change of microporous hollow fiber membranes[J].Journal of Membrane Science,1992,70(2/3):217-224.
[17] MAVROUDI M,KALDIS S P,SAKELLAROPOULOS G P.A study of mass transfer resistance in membrane gas-liquid contacting processes[J].Journal of Membrane Science,2006,272(1/2):103-115.
[18] ZHENG Q S,YU Y,ZHAO Z H.Effects of hydraulic pressure on the stability and transition of wetting modes of superhydrophobic surfaces[J].Langmuir,2005,21(26):12207-12212.
[2]张卫风.中空纤维膜接触器分离燃煤烟气中二氧化碳的试验研究[D].杭州:浙江大学,2006.
[3]陈思铭,张永春,郭超,等.醇胺溶液吸收CO2的动力学研究进展[J].化工进展,2014,33(增刊1):1-13.CHEN Siming,ZHANG Yongchun,GUO Chao,et al.Reaction kinetics of absorption of carbon dioxide with alkanolamines[J].Chemical Industry and Engineering Progress,2014,33(Sup1):1-13.
[4]张亚萍,江金正,季芹芹,等.混合醇胺溶液吸收烟气中CO2[J].化工生产与技术,2012,19(1):22-24.ZHANG Yaping,JIANG Jinzheng,JI Qinqin,et al.Research on CO2absorption of flue gas in the mixed alcohol amine solutions[J].Chemical Production and Technology,2012,19(1):22-24.
[5]史建公,刘志坚,赵良英,等.二氧化碳有机胺吸收剂研究进展[J].中外能源,2014,19(9):16-25.SHI Jiangong,LIU Zhijian,ZHAO Liangying,et al.Advances in organic amine CO2 absorbent research[J].Sino-Global Energy,2014,19(9):16-25.
[6]湛志钢,周旭萍,徐齐胜,等.PZ/AEEA混合吸收剂脱碳性能研究[J].动力工程学报,2016,36(7):535-540.ZHAN Zhigang,ZHOU Xuping,XU Qisheng,et al.Research on CO2capture performance of PZ/AEEA blends[J].Journal of Chinese Society of Power Engineering,2016,36(7):535-540.
[7] L Yuexia,YU Xinhai,TU S T,et al.Wetting of polypropylene hollow fiber membrane contactors[J].Journal of Membrane Science,2010,362(1/2):444-452.
[8] MALEK A,LI K,TEO W K.Modeling of microporous hollow fiber membrane modules operated under partially wetted conditions[J].Industrial&Engineering Chemistry Research,1997,36(3):784-793.
[9] ZHANG Hongyan,WANG Rong,LIANG D T,et al.Theoretical and experimental studies of membrane wetting in the membrane gas-liquid contacting process for CO2absorption[J].Journal of Membrane Science,2008,308(1/2):162-170.
[10] WANG R,LI D F,ZHOU C,et al.Impact of DEA solutions with and without CO2 loading on porous polypropylene membranes intended for use as contactors[J].Journal of Membrane Science,2004,229(1/2):147-157.
[11]付东,钟智坤.二乙醇胺-N-甲基二乙醇胺-水溶液表面张力实验研究[J].化学学报,2010,68(12):1241-1246.FU Dong,ZHONG Zhikun.Experimental study on the surface tension of diethanolamine-N-methyldiethanolamine-water mixtures[J].Acta Chimica Sinica,2010,68(12):1241-1246.
[12]黎四芳,任铮伟,李盘生,等.MDEA-MEA混合有机胺水溶液吸收CO2[J].化工学报,1994,45(6):698-703.LI Sifang,REN Zhengwei,LI Pansheng,et al.Absorption of CO2 by aqueous MDEA-MEA solution[J].Journal of Chemical Industry and Engineering(China),1994,45(6):698-703.
[13] VAZQUEZ G,ALVAREZ E,NAVAZA J M,et al.Surface tension of binary mixtures of water+monoethanolamine and water+2-amino-2-methyl-1-propanol and tertiary mixtures of these amines with water from 25°C to 50°C[J].Journal of Chemical&Engineering Data,1997,42(1):57-59.
[14] AGUILA-HERNANDEZ J,TREJO A,GRACIAFADRIQUE J.Surface tension of aqueous solutions of alkanolamines:single amines,blended amines and systems with nonionic surfactants[J].Fluid Phase Equilibria,2001,185(1/2):165-175.
[15] LU Jiangang,ZHENG Youfei,CHENG Mindong.Wetting mechanism in mass transfer process of hydrophobic membrane gas absorption[J].Journal of Membrane Science,2008,308(1/2):180-190.
[16] KAMO J,HIRAI T,KAMADA K.Solvent-induced morphological change of microporous hollow fiber membranes[J].Journal of Membrane Science,1992,70(2/3):217-224.
[17] MAVROUDI M,KALDIS S P,SAKELLAROPOULOS G P.A study of mass transfer resistance in membrane gas-liquid contacting processes[J].Journal of Membrane Science,2006,272(1/2):103-115.
[18] ZHENG Q S,YU Y,ZHAO Z H.Effects of hydraulic pressure on the stability and transition of wetting modes of superhydrophobic surfaces[J].Langmuir,2005,21(26):12207-12212.