| Pervaporation performance of polydimethylsiloxane/polyetherimide composite membrane for gasoline desulphurization(V) Mass transfer process study |
| Authors： CHEN Jian1, Song Guangwu2, CHEN Jinxun1, Tang Fei1, Xia Zhan1, LI Jiding*1 |
| Units： 1 Department of Chemical Engineering, Tsinghua University, Beijing, 100084;2 Xinjiang Dushanzi TianLi High & New Tech Co.Ltd, XinJiang, 83360 |
| KeyWords： PDMS; inverse gas chromatography; activity coefficient; diffusion coefficient; gasoline desulfurization |
| ClassificationCode：TQ028.8 |
| year,volume(issue):pagination： 2011,31(2):68-73 |
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Abstract： |
| The membrane separation technology is one of the most efficient separation methods, especially for deep desulfurization of FCC gasoline. Studying the behaviors of the solution and the diffusion of the small molecules in the membranes is an efficient way for directing the choice of membrane materials and it is also a necessary process for the foundation of membrane separation mechanism. Inverse gas chromatography is used to measure behaviors of the solution and the diffusion for the solvent/polymer systems, which is an exact, fast and convenient technique to research the correlation of the polymer/solvent systems. The infinite dilute activity and diffusion coefficients of thiophene, 2-methyl thiophene, 2,5-dimethyl thiophene, n-butyl mercaptan, n-butyl sulfide and heptane in cross-linked PDMS were obtained in the temperature range of 80-100℃ by inverse gas chromatography. The results showed that the order of infinite dilute activity coefficients was: thiophene >2-methylthiophene > 2, 5-dimethylthiophene>heptane > n-butyl sulphide > n-butyl mercaptan, and the order of infinite dilute diffusion coefficients was: thiophene >2-methylthiophene > 2, 5-dimethylthiophene>heptane >n-butyl mercaptan> n-butyl sulphide. This work makes a foundational contribution to further investigation on gasoline desulfurization and practical industry application. |
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Funds： |
| 国家973项目 （2009CB623404）；国家自然科学基金项目（20736003,20906056）；国家863计划项目（2007AA06Z317）和科技部项目（2008EG111021）；教育部博士点基金（20070003130）；国家重点实验室项目（(SKL-ChE-08A01)；中国博士后基金(023201069)。 |
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AuthorIntro： |
| 陈剑（1980－），男，河南信阳人，清华大学化学工程系，博士，助理研究员，从事膜分离研究。 |
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Reference： |
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[1]洪厚胜, 陈龙祥, 由涛, 张庆文. 渗透汽化复合膜[J], 化学进展, 2009, 21(10):2229-2234. [2]叶宏，冯旭东，梁海燕，等. 渗透汽化有机膜分离异构体混合物的研究进展[J]. 化 工 进 展,2009,28:58-62. [3]由涛，陈龙祥，张庆文，洪厚胜. 分子模拟方法在渗透汽化膜研究中的应用进展[J], 化工进展,2009,28(8):1302-1306. [4]由涛，陈龙祥，李波，等. 渗透汽化传质模型的研究进展[J], 化工进展，2009,28(7):1109-1114. [5]边宇, 李继定, 吕少华, 陈翠仙.溶剂在交联硅橡胶中无限稀释扩散系数测定[J], 高校化 学工程学报,2003,4(17):355-360. [6]边宇, 李继定, 陈翠仙, 等. 极性和非极性溶剂在聚乙烯中的无限稀释扩散系数的测定[J], 色谱, 2002,5(20):411-414. [7] 姜珍, 李继定, 赵之平, 等.非极性烷烃溶剂在聚乙烯膜中无限稀释扩散系数的测定[J], 高等学校化学学报,2005,26(2):273-276. [8] 姜珍, 李继定, 赵之平, 等. 三种芳烃溶剂在低密度聚乙烯膜材料中无限稀释扩散系数的测定,高等学校化学学报,2005,26(11):2069-2072. [9] 姜珍, 李继定, 曾楚怡, 等. 水、甲醇和乙醇溶剂在PVA膜材料中无限稀释扩散系数测定[J], 高等学校化学学报,2006,27(3):502-505. [10]陈天泉, 陈金勋, 李继定, 赵长伟, 陈翠仙正庚烷/ 有机硫体系渗透汽化脱硫[J]. 膜科学与技术,2007(27)4:87-90. [11] Rongbin Q, Changwei Z, Jiding Li, et al. Removal of thiophenes from n-octane/thiophene mixtures by pervaporation[J], J. Membr. Sci. 269(2006) 94-100. [12] Rongbin Q, Yujun Wang, Jiding Li, et al. Pervaporation separation of alkane/thiophene mixtures with PDMS membrane[J], J. Membr. Sci. 280(2006) 545-552. [13] Rongbin Q, Yujun W, Jiding L, et al. Sulfur removal from gasoline by pervaporation: the effect of hydrocarbon species[J], Sep. Purif. Technol., 51(2006) 258-264. [14]Rongbin Q, Yujun W, Jian C, et al. ZhuRemoving thiophenes from n-octane using PDMS–AgY zeolite mixed matrix membranes[J]. J. Membr. Sci.295 (2007) 114–120. [15]王丽华, 赵之平, 李继定, 陈翠仙. 一种可溶性聚酰亚胺的合成及其渗透汽化脱有机硫化物性能测试[J].高分子学报,2006,3:496-499. [16]Lihua W, Zhiping Z, Jiding L, Cuixian C. Synthesis and characterization of fluorinated polyimides for pervaporation of n-heptane/thiophene mixtures[J]. European Polymer Journal, 2006, 1266–1272. [17]赵长伟, 李继定, 赵之平, 等. PDMS有机硅膜的制备及其渗透汽化脱硫的研究[J]. 膜科学与技术, 2006, 26(5):72-75. [18]李继定,陈剑,叶宏,林阳政. 一种渗透汽化汽油脱硫聚乙二醇复合膜及其制备方法[P].中国专利:CN101053789,2007-10-17. [19]Jian C, Jiding L, Rongbin Q, et al. Pervaporation performance of crosslinked polydimethylsiloxane membranes for deep desulfurization of FCC gasoline: (I) Effect of different sulfur species[J], Journal of Membrane Science 322 (2008) 113–121. [20]Jian C, Jiding L, Rongbin Q, et al. Pervaporation separation of thiophene/heptane mixtures with polydimethylsiloxane (PDMS) membrane for desulfurization[J], Applied Biochemistry and Biotechnology, 2010,160:486-497. [21]陈剑,陈金勋,李继定,亓荣彬,陈翠仙. PDMS/PEI复合膜对FCC汽油的脱硫性能(I)制膜条件影响.膜科学与技术, 2009,29(2):81-86. [22]陈剑,李继定,亓荣彬,叶宏,陈翠仙. PDMS/PEI复合膜对FCC汽油的脱硫性能(II)Ag2O载体促进传递. 膜科学与技术, 2009, 29(3):39-44. [23]Jian Chen, Jiding Li, Jinxun Chen, Yangzheng Lin, Xiaogong Wang. Pervaporation separation of ethyl thioether/heptane mixtures by polyethylene glycol membranes, Separation and Purification Technology, 66 (2009) 606–612. [24]Zhang S. J., Tsuboi A., Nakata H., Ishikawa T.. Activity coefficients and diffusivities of solvents in polymers. J. Fluid Phase Equilibria, 2002,194-197: 1179-1189. [25] J. J. Van Deemter, F. J. Zuiderweg, A Klinkenberg, Longitudinal diffusion and resistance to mass transfer as causes of nonideality in chromatography, Chem. Eng. Sci. 5(1956) 271-289. [26] J. R. Conder, C. L. Young, Physicochemical applications of gas chromatography, Wiley, New York, 1979. |
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