聚酰亚胺中空纤维膜分离二氧化碳实验研究
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摘要
采用实验室自制小型聚酰亚胺中空纤维膜组件,在实验室建立膜分离天然气脱CO_2实验装置,系统考察高压侧放空气流量、压力、温度、长期运行稳定性等参数对膜组件性能的影响并进行实际工况模拟分析。试验分析表明,随着尾气放空量的增加,混合气渗透速率不断变大,而无论在渗透气还是尾气中,CO_2的体积分数都随着尾气放空量的增加而增加,且CO_2的脱除率不断下降;具体到不同压力之间的比较,可以看到更高的压力可以有更大的处理量;随着混合气温度的升高,渗透速率都明显上升,符合阿累尼乌斯公式;在长期测试过程中,聚酰亚胺膜组件的混合气渗透速率略有下降,整体而言渗透速率维持比较平稳,且CO_2对N2的分离系数也表现得较为稳定。
An experimental device for removing carbon dioxide from natural gas by membrane is established by using a small polyimide hollow fiber membrane module self-made in laboratory.The influences of discharge gas flow at high pressure side of membrane,pressure,temperature and long-term operation stability on the performance of the membrane module are investigated systematically and the practical operation conditions are simulated and analyzed.Results show that with the increase of discharge amount of tail gas,the penetration rate of the mixed gases increases,the concentration of carbon dioxide in both penetration gas and tail gas increases and carbon dioxide removal rate decreases.Higher pressures means larger treatment amount.With the increase of temperature of mixed gases,the permeability rate increases obviously,which is in accordance with Arrhenius equation.In a long-term test,the permeation rate of mixed gas in polyimide membrane module decrease slightly.The permeation rate remains stable overall and the separation coefficient of carbon dioxide to nitrogen remains stable too.
An experimental device for removing carbon dioxide from natural gas by membrane is established by using a small polyimide hollow fiber membrane module self-made in laboratory.The influences of discharge gas flow at high pressure side of membrane,pressure,temperature and long-term operation stability on the performance of the membrane module are investigated systematically and the practical operation conditions are simulated and analyzed.Results show that with the increase of discharge amount of tail gas,the penetration rate of the mixed gases increases,the concentration of carbon dioxide in both penetration gas and tail gas increases and carbon dioxide removal rate decreases.Higher pressures means larger treatment amount.With the increase of temperature of mixed gases,the permeability rate increases obviously,which is in accordance with Arrhenius equation.In a long-term test,the permeation rate of mixed gas in polyimide membrane module decrease slightly.The permeation rate remains stable overall and the separation coefficient of carbon dioxide to nitrogen remains stable too.
引文
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[13]陈华,董子丰,李东飞,等.膜分离法从天然气中提浓氦的实验研究[J].天然气工业,1995,16(6):66-69.
[14]胡彪,梁金川.高含CO2天然气处理工艺研究[J].当代化工,2015,44(11):2697-2699.
[15]Yin G,Liu Z,Liu Q,et al.The role of different properties of activated carbon in CO2adsorption[J].Chemical Engineering Journal,2013,230:133-140.
[16]夏勇,钟伟,张超,等.天然气脱硫脱碳装置优化改造运行效果分析[J].石油与天然气化工,2013,42(4):353-360.
[17]季鹏飞,曹义鸣,介兴明,等.CO2分离中空纤维复合膜的制备及气体渗透性能的研究[J].石油化工,2010,39(9):1011-1015.
[18]王保国,吕宏凌,杨毅.膜分离技术在石油化工领域的应用进展[J].石油化工,2006,35(8):705-710.
[19]时均,袁权,高从堦.膜技术手册[M].北京:化学工业出版社,2001:494-495.
[20]Pandey P,Chauhan R S.Membranesfor gas separation[J].Prog Polym Sci,2001,26(6):853-893.
[21]彭海媛.膜气体吸收法脱除电厂模拟烟气CO2[J].化学工程与设备,2010,(9):174-177.
[22]王洪梅,罗仕忠,吴永永,等.改性硅胶吸附剂用于CO2/CH4吸附分离的研究[J].天然气化工:C1化学与化工,2012,37(5):1-6.
[2]叶向群,孙亮,张林,等.中空纤维膜基吸收法脱除空气中二氧化碳的研究[J].高校化学工程学报,2003,17(3):237-242.
[3]聂江华,樊栓狮,郎雪梅,等.水合物法快速脱除天然气中二氧化碳[J].现代化工,2011,31(2):45-51.
[4]Rada Z H,Abid H R,Shang J,et al.Effects of amino functionality on uptake of CO2,CH4and selectivity of CO2/CH4on titaniumbased MOFs[J].Fuel,2015,160:318-327.
[5]石会龙,李春虎,张祥坤,等.高含硫天然气CCJ脱硫脱碳复合溶剂的中试研究[J].石油与天然气化工,2016,45(1):25-29.
[6]孙承贵,曹义鸣,介兴明,等.中空纤维致密膜基吸收CO2传质机理分析[J].高效化学工程学报,2007,21(4):556-562.
[7]Sridhar S,Smitha B,Aminabhavi T M.Separationof carbondioxidefromnaturagas mixtures through polymeric membranes[J].A Review Sep Purif Rev,2007,36(2):113-114.
[8]陈炜,朱宝库,王建黎,等.中空纤维膜接触器分离CO2/N2混合气体的研究[J].膜科学与技术,2004,24(1):32-37.
[9]Babcock R E,Splliman R W.Natural gas cleanup[J].Energy Prog,1988,8(3):135-138.
[10]Bos A,Pünt I,Wessling M,et al.CO2-inducedplasticization phenomena in glassy polymers[J].Journalof Membrane Science,1999,155(1):67-78.
[11]陈赓良.醇胺法脱硫脱碳工艺的回顾与展望[J].石油与天然气化工,2003,32(3):134-138.
[12]马晓红,于生,谢伟,等.高含二氧化碳天然气脱碳技术[J].油气田地面工程,2012,31(4):45-46.
[13]陈华,董子丰,李东飞,等.膜分离法从天然气中提浓氦的实验研究[J].天然气工业,1995,16(6):66-69.
[14]胡彪,梁金川.高含CO2天然气处理工艺研究[J].当代化工,2015,44(11):2697-2699.
[15]Yin G,Liu Z,Liu Q,et al.The role of different properties of activated carbon in CO2adsorption[J].Chemical Engineering Journal,2013,230:133-140.
[16]夏勇,钟伟,张超,等.天然气脱硫脱碳装置优化改造运行效果分析[J].石油与天然气化工,2013,42(4):353-360.
[17]季鹏飞,曹义鸣,介兴明,等.CO2分离中空纤维复合膜的制备及气体渗透性能的研究[J].石油化工,2010,39(9):1011-1015.
[18]王保国,吕宏凌,杨毅.膜分离技术在石油化工领域的应用进展[J].石油化工,2006,35(8):705-710.
[19]时均,袁权,高从堦.膜技术手册[M].北京:化学工业出版社,2001:494-495.
[20]Pandey P,Chauhan R S.Membranesfor gas separation[J].Prog Polym Sci,2001,26(6):853-893.
[21]彭海媛.膜气体吸收法脱除电厂模拟烟气CO2[J].化学工程与设备,2010,(9):174-177.
[22]王洪梅,罗仕忠,吴永永,等.改性硅胶吸附剂用于CO2/CH4吸附分离的研究[J].天然气化工:C1化学与化工,2012,37(5):1-6.