Ultraselective carbon molecular sieve membrane for hydrogen purification

• 作者: Bingsen Zhang Changhai Liang Lin Li Liu He Mengjie Hou Ruisong Xu Tonghua Wang Yongzhao Wang
• 来源期刊: 能源化学
• 年，卷（期）: 2020,（11）
• 页码范围: 16-24
• 页数: 9页
• 语种: 英文

摘要

Hydrogen is a green clean fuel and chemical feedstock.Its separation and purification from hydrogen-containing mixtures is the key step in the production of hydrogen with high purity (＞99.99％).In this work,carbon molecular sieve (CMS) membranes with ultrahigh permselectivity for hydrogen purification were fabricated by high-temperature (700-900 ℃) pyrolysis of polymeric precursor of phenolphthalein-based cardo poly(arylene ether ketone) (PER-C).The evolution of the microstructural texture and ultramicroporous structure and gas separation performance of the CMS membrane were characterized via TG-MS,Fr-IR,XRD,TEM,CO2 sorption analysis and gas permeation measurements.CMS membranes prepared at 700 ℃ exhibited amorphous turbostratic carbon structures and high H2 permeability of 5260 Barrer with H2/CH4,H2/N2 and H2/CO selectivities of 311,142,75,respectively.When carbonized at 900 ℃,the CMS membrane with ultrahigh H2/CH4 selectivity of 1859 was derived owing to the formation of the dense and ordered carbon structure.CMS membranes with ultrahigh permselectivity exhibit an attractive application prospect in hydrogen purification.