采用浸渍涂覆法,以聚醚共聚酰胺PEBA1074嵌段高分子为选择层膜材料制备具有超薄分离层的PEI/PDMS/PEBA1074/PDMS多层复合气体分离膜,探讨了操作条件对H2、N2、CH4和CO2等在多层复合膜中的渗透性能的影响.多层复合膜对极性气体具有较高的渗透通量,并且对极性/非极性气体分离体系具有较高的选择性.CO2对多层复合膜存在增塑作用,其渗透通量随操作压力的增加而增加；随着操作温度的升高,H2、N2、CH4和CO2在复合膜中的渗透通量显著增大,而CO2/非极性气体(H2、N2和CH4)的分离系数减小.气体渗透通量与温度的关系在PEO链段熔点的上下分别满足不同的Arrhcnius方程.当操作温度大于PEO链段熔点温度时,气体的渗透活化能减小.
参考文献
| [1] | 颜家保,张浩,于庆满.二氧化碳回收技术及应用前景[J].应用化工,2005(02):76-78. |
| [2] | 许庆本,李德发,江迎宝.天然气制氢装置中的CO2回收利用[J].甘肃科技,2008(04):28-30. |
| [3] | Rao A B;Rubin E S .A technical,economic,and environmental assessment of amine-based CO2 capture technology for power plant greenhouse gas control[J].Environmental Science and Technology,2002,36:44674475. |
| [4] | Baker R W.Membrane Technology and Applications[M].New York:McGraw-Hill,2000:6-14. |
| [5] | Jae Hoon Kim;Seong Yong Ha;Young Moo Lee .Gas permeation of poly(amide-6-b-ethylene oxide_ copolymer[J].Journal of Membrane Science,2001(2):179-193. |
| [6] | Bondar V I;Freeman B D;Pinnau I .Gas transport properties of poly (ether-b-amide) segment block copolymers[J].Journal of Polymer Science Part B:Polymer Physics,2000,38:205]-2062. |
| [7] | Liu L;Chakma A;Feng X .Preparation of hollow-fiber poly(ether block amide)/polysulfone composite membranes for separation of carbon dioxidc from nitrogen[J].Chcm Eng J,2004,105:43-51. |
| [8] | Li Liu;Amit Chakma;Xianshe Feng .A novel method of preparing ultrathin poly(ether block amide) membranes[J].Journal of Membrane Science,2004(1/2):43-52. |
| [9] | Blume I;Pinnau I .Composite membrane,method of preparation and use[P].US Pat:4963165,1990-10-16. |
| [10] | Car A;Stropnik C;Yave W et al.Pebax⑤ /polyethylene glycol blend thin film composite membranes for CO2 separation:Performance with mixed gases[J].Separation and Purification Technology,2008,62:110-117. |
| [11] | 刘迪,任吉中,邓麦村.聚醚共聚酰胺复合气体分离膜的制备与分离性能[J].膜科学与技术,2010(03):44-49. |
| [12] | Lin H;Freeman B D .Gas solubility diffusivity permeability in poly (ethylene oxide)[J].Journal of Membrane Science,2004,239:105-117. |
| [13] | Li JT.;Nagai K.;Nakagawa T.;Mau AWH.;Wang SC. .Effect of polyethyleneglycol (PEG) on gas permeabilities and permselectivities in its cellulose acetate (CA) blend membranes[J].Journal of Membrane Science,1998(2):143-152. |
| [14] | Ribeiro, CP;Freeman, BD .Carbon dioxide/ethane mixed-gas sorption and dilation in a cross-linked poly(ethylene oxide) copolymer[J].Polymer: The International Journal for the Science and Technology of Polymers,2010(5):1156-1168. |
| [15] | Lin H;Van Wagner E;Freeman BD;Toy LG;Gupta RP .Plasticization-enhanced hydrogen purification using polymeric membranes.[J].Science,2006(5761):639-642. |
| [16] | Hideto Matsuyama;Masaaki Teramoto;Hiroshi Sakakura .Selective permeation of CO_2 through poly{2-(N, N-dimethyl) aminoethyl methacrylate} membrane prepared by plasma-graft polymerization technique[J].Journal of Membrane Science,1996(2):193-200. |
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