为了得到渗透物小分子在聚合物膜内的溶解和扩散性质,进而研究膜分离机理并指导膜材料选择,本文选用反相气相色谱法研究溶剂与聚合物材料之间的相互作用.在80～100℃温度范围内,采用气相色谱法测定噻吩、2-甲基噻吩、2,5-二甲基噻吩、丁硫醚、丁硫醇五种典型的形态硫及正庚烷在硅橡胶中的无限稀释活度系数和扩散系数,对比膜分离性能的实验数据,分析了不同分子结构及其特点对于聚合物/溶剂体系溶解扩散性能的影响.结果表明,随着温度升高,有机硫的无限稀释活度系数和无限扩散系数都增大.在同一温度下,无限稀释活度系数顺序是:噻吩<2-甲基噻吩<2,5-二甲基噻吩<正庚烷<正丁硫醚<正丁硫醇,无限稀释扩散系数顺序为:噻吩>2-甲基噻吩>2,5-二甲基噻吩>正丁硫醇>正庚烷>正丁硫醚.该成果为膜法汽油脱硫深入研究和工业应用奠定了基础.
参考文献
| [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(10):2229-2234. |
| [2] | 叶宏,冯旭东,梁海燕,王静,张晶晶,于群.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(z1):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(08):1302-1306,1312. |
| [4] | 由涛,陈龙祥,李波,张庆文,洪厚胜.渗透汽化传质模型的研究进展[J].化工进展,2009(07):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(04):355-360. |
| [6] | 边宇,李继定,陈翠仙,吕少华,张树华.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(05):411-414. |
| [7] | 姜珍,李继定,赵之平,陈翠仙,于宏伟,张志华.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(02):273-276. |
| [8] | 姜珍,李继定,赵之平,陈翠仙,于宏伟,张志华.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[J].高等学校化学学报,2005(11):2069-2072. |
| [9] | 姜珍,李继定,曾楚怡,陈剑,陈天泉,陈翠仙.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(03):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(04):87-90,95. |
| [11] | Qi Rongbin;Zhao Changwei;Li Jiding et al.Remoral of thiophenes from n-octane/thiophene mixtures by pervaporation[J].Journal of Membrane Science,2006,269:94-100. |
| [12] | Qi RB;Wang YJ;Li JD;Zhao CW;Zhu SL .Pervaporation separation of alkane/thiophene mixtures with PDMS membrane[J].Journal of Membrane Science,2006(1/2):545-552. |
| [13] | Qi Rongbin;Wang Yujun;Li Jiding et al.Sulfur remoral from gasoline by pervaporation:the effect of hydrocarbon species[J].Separation and Purification Technology,2006,51:258-264. |
| [14] | Qi Rongbin;Wang Yujun;Chen Jian et al.ZhuRemoving thiophenes from n-octane using PDMS-AgY zeolite mixed matrix membranes[J].Journal of Membrane Science,2007,295:114-120. |
| [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(03):496-499. |
| [16] | Wang LH;Zhao ZP;Li JD;Chen CX .Synthesis and characterization of fluorinated polyimides for pervaporation of n-heptane/thiophene mixtures[J].European Polymer Journal,2006(6):1266-1272. |
| [17] | 赵长伟,李继定,赵之平,亓荣彬,陈翠仙,于宏伟,张志华.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(05):72-75,92. |
| [18] | 李继定;陈剑;叶宏 等.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] | Chen Jian;Li Jiding;Qi Rongbin 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,2008,322:113-121. |
| [20] | Jian Chen;Jiding Li;Rongbin Qi;Hong Ye;Cuixian Chen .Pervaporation Separation of Thiophene–Heptane Mixtures with Polydimethylsiloxane (PDMS) Membrane for Desulfurization[J].Applied biochemistry and biotechnology, Part A. enzyme engineering and biotechnology,2010(2):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[J].膜科学与技术,2009(02):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（Ⅲ）Ag2O载体促进传递[J].膜科学与技术,2009(03):39-44. |
| [23] | Jian Chen;Jiding Li;Jinxun Chen .Pervaporation separation of ethyl thioether/heptane mixtures by polyethylene glycol membranes[J].Separation and Purification Technology,2009(3):606-612. |
| [24] | Zhang SJ.;Tsuboi A.;Nakata H.;Ishikawa T. .Activity coefficients and diffusivities of solvents in polymers[J].Fluid Phase Equilibria,2002(Special Issue SI):1179-1189. |
| [25] | Van Deemter J J;Zuiderweg F J;Klinkenberg A .Longitudinal diffusion and resistance to mass transfer as causes of nonideality in chromatography[J].Chemical Engineering Science,1956,5:271-289. |
| [26] | Conder J R;Young C L.Physicochemical applications of gas chromatography[M].New York:wiley,1979 |
| [27] | Zhao CW;Li JD;Jiang Z;Chen CX .Measurement of the infinite dilution diffusion coefficients of small molecule solvents in silicone rubber by inverse gas chromatography[J].European Polymer Journal,2006(3):615-624. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%