摘要
以实验室制备成功的SR/Ceramic 和 PPESK/Ceramic复合膜为基础,对O2、N2、H2、CO、CO2、CH4等气体在高聚物/陶瓷复合膜上的渗透性能进行研究;在较宽的温度范围内考察了复合膜的使用效果,并获得各种气体的渗透活化能及其与气体临界温度的关系;渗透活化能随温度的增大而降低。同时,以空气分离体系为对象,考察了膜分离器的操作参数q 和pr 对膜分离系统进程行为的影响;实验结果和理论分析一致。
The permeation performances of gases, such as O2, N2, H2, CO, CO2, CH4 were investigated in detail on both SR/Ceramic and PPESK/Ceramic composite membrane from ambient temperature to relatively high temperature up to 250°C. The permeation activation energies and the relationship between permeation activation energies and the corresponding critical temperature were obtained. Permeation activation energies decrease with increasing the critical temperature. The selectivity of oxygen to nitrogen and normalized permeation rate of oxygen in SR/ceramic composite membrane are 1.5 and 1.5×10-3 m3(STP)·m-2· s-1·MPa-1 at 250°C respectively, while the selectivity of hydrogen to nitrogen and normalized permeation rate of hydrogen in PPESK-SR/ceramic composite membrane are 12.86 and 1.5×10-3 m3(STP)·m-2· s-1·MPa-1 at 240°C separately. The rich-oxygen air with 31% (mol) oxygen in permeate side was obtained under the conditions of q greater than 15 and Pr equal to 0.091. Meanwhile, the effects of operation parameters such as q and pr on the separation performance of membrane separator applied to air-separation system are also discussed.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2001年第5期420-424,共5页
Journal of Chemical Engineering of Chinese Universities
