NaY沸石杂化炭膜的制备及气体分离性的研究
作者:李欣明,黄鹤鸣,吴永红,张兵,王同华
单位: 1. 沈阳工业大学 石油化工学院,辽阳111003; 2. 大连理工大学 化工学院,大连116024
关键词: 沸石;炭膜;气体分离;聚酰亚胺
分类号: TQ028.8
出版年,卷(期):页码: 2021,41(3):24-28

摘要:
 以聚酰亚胺为前驱体,NaY型沸石为掺杂剂,经成膜和炭化制备了杂化炭膜。采用扫描电镜、X-射线衍射、热重分析、红外光谱分析对膜样品的结构与性质进行了表征。考察了掺杂剂量、渗透温度与渗透压力对炭膜的结构或气体分离性的影响。结果表明:与纯炭膜相比,杂化炭膜在保持高O2/N2选择性的前提下,渗透性显著提高;随着膜内沸石含量的提高,杂化炭膜的渗透性明显提高。由沸石含量为0.5%前驱体经650℃炭化所制备的杂化炭膜,对O2的渗透性达79.5 Barrer,O2/N2选择性达7.5。
 Hybrid carbon membranes were prepared using polyimide as precursor and NaY type zeolite as dopant via membrane formation and carbonization. The structure and property of membrane samples were characterized by scanning electron microscope, X-ray diffraction, thermogravimetric analysis and infrared spectroscopy. The influences of dopant amount, permeation temperature and permeation pressure on the structure or gas separation performance of carbon membrane were investigated. The results show that the hybrid carbon membrane shows increased permeability at the premise of keeping high O2/N2 selectivity, as compared with pure carbon membrane. Meanwhile, the permeability increases with elevating the zeolite content in membrane. When hybrid carbon membrane were prepared by the carbonization temperature of 650℃ and zeolite content of 0.5%, the O2 permeability reaches to 79.5 Barrer, together with O2/N2 selectivity of 7.5.

基金项目:
国家自然科学基金(21776033、21878033),辽宁省百千万人才项目(2018921046),辽宁省教育厅科研项目(LJGD2020002),沈阳市科技创新人才项目(RC200325)

作者简介:
李欣明(1996-),女,辽宁锦州人,硕士研究生,从事分离膜材料制备研究工作

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