以聚醚共聚酰胺Pebax1074为分离层主体膜材料,以三醋酸甘油酯(GTA)为添加剂,制备具有超薄分离层的Psf/PDMS/Pebax1074和Psf/PDMS/Pebax1074-GTA/PDMS多层复合气体分离膜.考察了Pebax1074和GTA浓度、温度、压力等条件对H2、N2、CH4和CO2等在复合膜中的渗透性能的影响.结果显示,随Pebax1074浓度的增大,Psf/PDMS/Pebax1074膜对气体的渗透通量急剧下降,气体选择性逐渐增大至接近Pebax1074本征值.当GTA质量分数大于50％,Psf/PDMS/Pebax1074-GTA复合膜的气体渗透通量大幅增加,而气体选择性不高.利用硅橡胶对复合膜表面保护后,气体选择性接近Pebax1074材料本征值.Psf/PDMS/Pebax1074-GTA/PDMS多层复合膜对CO2具有较高的渗透通量和较高的选择性.CO2对多层复合膜存在塑化效应,渗透通量随压差增大而增大;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/(N2、CH4、H2)的分离系数减小.
参考文献
| [1] | Edward S. Rubin;Hari Mantripragada;Aaron Marks;Peter Versteeg;John Kitchin .The outlook for improved carbon capture technology[J].Progress in energy and combustion science,2012(5):630-671. |
| [2] | 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].Environ Sei Technol,2002,36(20):4467-4475. |
| [3] | Gomes D;Peinemann KV;Nunes SP;Kujawski W;Kozakiewicz J .Gas transport properties of segmented poly(ether siloxane urethane urea) membranes[J].Journal of Membrane Science,2006(1/2):747-753. |
| [4] | Liu L;Chakma A;Feng X .Propylene separation from nitrogen by poly(ether block amide) composite membranes[J].Journal of Membrane Science,2006(1/2):645-654. |
| [5] | Ren, Xiaoling;Ren, Jizhong;Li, Hui;Feng, Shichao;Deng, Maicun.Poly (amide-6-b-ethylene oxide) multilayer composite membrane for carbon dioxide separation[J].International Journal of Greenhouse Gas Control,2012:111-120. |
| [6] | 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. |
| [7] | 冯世超,任吉中,任晓灵,李晖,花开胜,邓麦村.聚醚共聚酰胺/聚乙二醇共混膜的制备及其气体渗透性能的研究[J].膜科学与技术,2012(05):27-33. |
| [8] | Car A;Stropnik C;Yave W;Peinemann KV .PEG modified poly(amide-b-ethylene oxide) membranes for CO2 separation[J].Journal of Membrane Science,2008(1):88-95. |
| [9] | Liu, L;Chakma, A;Feng, XS .CO2/N-2 separation by poly(ether block amide) thin film hollow fiber composite membranes[J].Industrial & Engineering Chemistry Research,2005(17):6874-6882. |
| [10] | Anja Car;Chrtomir Stropnik;Wilfredo Yave .Pebax~R/polyethylene glycol blend thin film composite membranes for CO2 separation: Performance with mixed gases[J].Separation and Purification Technology,2008(1):110-117. |
| [11] | R. Surya Murali;S. Sridhar;T. Sankarshana .Gas Permeation Behavior of Pebax-1657 Nanocomposite Membrane Incorporated with Multiwalled Carbon Nanotubes[J].Industrial & Engineering Chemistry Research,2010(14):6530-6538. |
| [12] | Li Liu;Amit Chakma;Xianshe Feng .Preparation of hollow fiber poly(ether block amide)/polysulfone composite membranes for separation of carbon dioxide from nitrogen[J].Chemical Engineering Journal,2004(1/2):43-51. |
| [13] | Pichard S .A gas permeable membrane[P].WO2008/017307 A1,2008-02-14. |
| [14] | Yave W;Car A;Peinemann K V et al.Gas permeability and free volume in poly (amide-b-ethylene oxide)/polyethylene glycol blend membranes[J].Journal of Membrane Science,2009,339(1-2):177-183. |
| [15] | Miller M B .Highly CO2-philic liquid oligomers and phase change-solvents for the absorption of CO2[D].University of Pittsburgh,2011. |
| [16] | Feng, Shichao;Ren, Jizhong;Li, Zhansheng;Li, Hui;Hua, Kaisheng;Li, Xinxue;Deng, Maicun.Poly(amide-12-b-ethylene oxide)/glycerol triacetate blend membranes for CO2 separation[J].International Journal of Greenhouse Gas Control,2013:41-48. |
| [17] | 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. |
| [18] | H. Lin;B.D. Freeman .Gas solubility, diffusivity and permeability in poly(ethylene oxide)[J].Journal of Membrane Science,2004(1):105-117. |
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%