Effect of the annealing temperature of polybenzimidazole membranes in high pressure and high temperature H2/CO2 gas separations
Effect of the annealing temperature of polybenzimidazole membranes in high pressure and high temperature H2/CO2 gas separations
复制标题
聚苯并咪唑膜退火温度对高压高温H2/CO2气体分离的影响
DOI：
10.1016/j.memsci.2023.121619
复制
发表时间：
2023
影响因子：
9.5
通讯作者：
Musselman, Inga H.
中科院分区：
文献类型：
--
作者：
Perez, Edson V.;Ferraris, John P.;Balkus, Kenneth J.;Musselman, Inga H.
研究了退火温度对聚苯并咪唑（PBI）膜分离H2/CO2气体的影响。在35 °C、100 °C、200 °C和300 °C以及在高达45巴的压力下，用纯H2、CO2和N2气体以及H2：CO2（1：1）混合物测试从250 °C至400 °C退火的膜的气体渗透。气体渗透数据表明，膜的渗透性和选择性受到退火温度、吸附水的存在和剩余浇铸溶剂（DMAc）的显著影响。在35 °C的测试温度下，对于分别在250 °C、300 °C和400 °C下退火的膜，获得了理想的H2/CO2选择性为50、49和66，纯H2渗透性为1.5、0.8和1.5 Barrer。在此温度下，高气体混合物H2/CO2的选择性为41，73，和47与H2的渗透率为1.03，0.26，和0.50 Barrer的这些膜也得到。在300 °C的测试温度下，对于在250 °C、300 °C和400 °C下退火的膜，理想和气体混合物H2/CO2选择性分别下降到44、28和30（理想，H2 = 45、45、44 Barrer）和19、22和23（混合物，H2= 41、43和44 Barrer）。当在渗透循环期间在大于100 °C的温度下从膜中除去水时，其中测试温度从35 °C增加到300 °C，在400 °C下退火的膜的选择渗透性特性变得更可再现。在35 °C下，来自第二渗透性循环的渗透性增加，但是对于气体混合物（H2= 1.4 Barrer），H2/CO2选择性降低至21，对于纯气体（H2= 2.2 Barrer），H2/CO2选择性降低至34。结果表明，高退火温度可能会引起的聚合物链的配置和构象的变化，赋予独特的选择性渗透性能的膜。H2、CO2和N2从纯气体和H2：CO2混合物中的渗透活化能也与这些变化相关。
The effect of the annealing temperature of polybenzimidazole (PBI) membranes on H2/CO2gas separations was investigated. Membranes annealed from 250 °C to 400 °C were tested for gas permeation with pure H2, CO2, and N2gases and a H2:CO2(1:1) mixture at 35 °C, 100 °C, 200 °C, and 300 °C and at pressures up to 45 bar. Gas permeation data show that permeability and selectivity of the membranes is significantly impacted by the annealing temperature, the presence of adsorbed water, and remaining casting solvent (DMAc). At a testing temperature of 35 °C, ideal H2/CO2selectivities of 50, 49, and 66 with pure H2permeabilities of 1.5, 0.8, and 1.5 Barrer were obtained for membranes annealed at 250 °C, 300 °C, and 400 °C, respectively. At this temperature, high gas mixture H2/CO2selectivities of 41, 73, and 47 with H2permeabilities of 1.03, 0.26, and 0.50 Barrer were also obtained for these membranes. At testing temperatures of 300 °C, both the ideal and gas mixture H2/CO2selectivities dropped to 44, 28, and 30 (ideal, H2= 45, 45, 44 Barrer) and to 19, 22, and 23 (mixture, H2= 41, 43, and 44 Barrer) for membranes annealed at 250 °C, 300 °C, and 400 °C, respectively. As water was removed from the membranes at temperatures greater than 100 °C during permeation cycles, where the testing temperature was increased from 35 °C to 300 °C, the permselectivity properties of the membranes annealed at 400 °C became more reproducible. Permeabilities at 35 °C from a second permeability cycle increased, but H2/CO2selectivities decreased to 21 for gas mixtures (H2= 1.4 Barrer) and to 34 for pure gases (H2= 2.2 Barrer). The results suggest that high annealing temperatures may induce changes in the configuration and conformation of the polymer chains, imparting distinctive permselectivity properties to the membranes. Activation energies of permeability for H2, CO2, and N2from pure gases and H2:CO2mixtures correlated with these changes as well.
登录
查看更多内容
未掺杂聚苯并咪唑随相对湿度变化的原位 FTIR 研究
影响因子：
5.9
作者：
P. Christensen;Steven Jones
通讯作者：
Steven Jones
芳香族四胺与酯缩合形成聚苯并咪唑的机理及所得缩聚物的结构
DOI：
10.1080/10601326708053979
发表时间：
1967
期刊：
Journal of Macromolecular Science, Part A
影响因子：
--
作者：
D. Gray;G. P. Shulman;R. Conley
通讯作者：
R. Conley
DOI：
10.1002/bbpc.19610651005
发表时间：
1961
期刊：
Zeitschrift für Elektrochemie, Berichte der Bunsengesellschaft für physikalische Chemie
影响因子：
--
作者：
H. Zimmermann
通讯作者：
H. Zimmermann
影响因子：
9.5
作者：
A. Naderi;Akbar Asadi Tashvigh;T. Chung;Martin Weber;C. Maletzko
通讯作者：
A. Naderi;Akbar Asadi Tashvigh;T. Chung;Martin Weber;C. Maletzko
412. 咪唑在四氯化碳溶液中的氢键作用
DOI：
10.1039/jr9610002165
发表时间：
1961
期刊：
Journal of The Chemical Society (resumed)
影响因子：
--
作者：
D. Anderson;J. Duncan;F. Rossotti
通讯作者：
F. Rossotti