通过正硅酸乙酯与苯基三乙氧基硅烷共水解缩聚反应制备苯基修饰SiO2膜,研究膜材料的氢气渗透和分离性能,并将其作为膜反应器的关键材料应用于水煤气变换反应.结果表明,氢气在苯基修饰SiO2膜中的渗透率随着温度的升高而增大,遵循活化扩散机理,300℃下H2渗透率达到4.67×10-7 mol/(m2·s·Pa),理想分离系数H2/CO、H2/CO2和H2/SF6分别达到10.54、10.50、21.16.在300℃,反应物H2O/CO摩尔比为2∶1的条件下进行水煤气变换反应,膜反应器的CO的转化率比传统固定床反应的CO的转化率高约12％,其原因是苯基修饰的SiO2膜对H2具有一定的选择性.
参考文献
| [1] | 王卫平,潘秀莲,张小亮,熊国兴,杨维慎.钯/陶瓷中空纤维复合膜反应器中的水煤气变换反应[J].催化学报,2005(12):1042-1046. |
| [2] | Brunetti A;Barbieri G;Drioli E;Granato T;Lee KH .A porous stainless steel supported silica membrane for WGS reaction in a catalytic membrane reactor[J].Chemical Engineering Science,2007(18/20):5621-5626. |
| [3] | Maria E. Adrover;Eduardo Lopez;Daniel O. Borio .Theoretical Study of a Membrane Reactor for the Water Gas Shift Reaction Under Nonisothermal Conditions[J].AIChE Journal,2009(12):3206-3213. |
| [4] | Scott Battersby;Simon Smart;Bradley Ladewig .Hydrothermal stability of cobalt silica membranes in a water gas shift membrane reactor[J].Separation and Purification Technology,2009(2):299-305. |
| [5] | Castricum HL;Sah A;Kreiter R;Blank DHA;Vente JF;ten Elshof JE .Hydrothermally stable molecular separation membranes from organically linked silica[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2008(18):2150-2158. |
| [6] | Nomura M;Ono K;Gopalakrishnan S;Sugawara T;Nakao SI .Preparation of a stable silica membrane by a counter diffusion chemical vapor deposition method[J].Journal of Membrane Science,2005(1/2):151-158. |
| [7] | 韦奇,李健林,宋春林,刘卫,陈初升.微孔二氧化硅膜的制备、氢气分离以及水热稳定性研究[J].无机材料学报,2004(01):133-139. |
| [8] | de Vos Renate M.;Verweij Henk;Maier Wilhelm F. .Hydrophobic silica membranes for gas separation[J].Journal of Membrane Science,1999(1):277-288. |
| [9] | 韦奇,李健林,宋春林,刘卫,陈初升.憎水二氧化硅膜的制备、表征及水热稳定性研究[J].无机材料学报,2004(02):417-423. |
| [10] | 王艳丽,韦奇,于春晓,李群艳,聂祚仁.乙烯基修饰的微孔二氧化硅膜孔结构与疏水性研究[J].无机材料学报,2007(05):949-953. |
| [11] | Wei Qi;Wang Fei;Nie Zuoren et al.Highly hydro thermally stable microporous silica membranes for hydrogen separation[J].Journal of Physical Chemistry B,2008,112(31):9354-9359. |
| [12] | 李振杰,韦奇,魏娜娜,李群艳,聂祚仁.苯基修饰的疏水微孔二氧化硅膜的制备与表征[J].高等学校化学学报,2010(12):2482-2487. |
| [13] | Sabine Giessler;Luke Jordan;Joao C.Diniz da Costa;G.Q. Lu .Performance of hydrophobic and hydrophilic silica membrane reactors for the water gas shift reaction[J].Separation and Purification Technology,2003(1/3):255-264. |
| [14] | de Vos RM.;Verweij H. .Improved performance of silica membranes for gas separation[J].Journal of Membrane Science,1998(1/2):37-51. |
| [15] | Scott Battersby;Mikel C. Duke;Shaomin Liu;Victor Rudolph;Joao C. Diniz da Costa .Metal doped silica membrane reactor: Operational effects of reaction and permeation for the water gas shift reaction[J].Journal of Membrane Science,2008(1/2):46-52. |
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%