Gas separation performance of enhanced carbon molecular sieve (CMS) membranes rendered from two-step pyrolyzing process
Carbon molecular sieve (CMS) membranes were prepared by two-step thermal treatment process. During this procedure, microcavity opening region was observed at 400 ~ 500 ℃. High gas permeable polybenzoxazole (PBO) was obtained at this intermediate ranges. After that region, molecular sieving effect was strengthened with decrease of permeability than intermediate thermally treated membrane. Precise characterization was performed using spectroscopic and thermo gravimetric analysis. Microcavities obtained from thermal treatment and pyrolysis were characterized by N2 adsorption and desorption experiments. Obtained PBO and CMS membranes easily surpassed the upper limit for conventional polymer membranes and can be useful for membrane separation process at harsh conditions.
Gas separation Carbon molecular sieve membrane Polybenzoxazole membrane Thermal rearrangement
Jae Eun Lee Keun Young Kim Sang Hoon Han Chul Ho Jung Ho Bum Park Young Moo Lee
Hanyang University, Department of Chemical Engineering, Seoul, Korea
国际会议
The 5th International Conference on Separation Science and Technology(第五届国际分离科学与技术会议)
北京
英文
2007-10-14（万方平台首次上网日期，不代表论文的发表时间）