天津工业大学学报2024，Vol.43Issue(4)：7-11,18,6.DOI:10.3969/j.issn.1671-024x.2024.04.002
聚酰亚胺复合膜的制备及其在沼气提纯中的应用
Propration of polyimide composite membrane and its application in biogas purification
摘要
Abstract
To solve the problems of low purity of CO2 and high loss rate of CH4 in the single-stage membrane process during biogas separation,an ultrahighly selective composite membrane with poly imide separation layer was prepared by interfacial polymerization.The effects of the operating temperature,the feed pressure,and the stage cut on the separation performance were investigated.The results showed that the membrane exhibited excellent separation performance under different operating conditions.The high purity of CO2 could be obtained on the permeate side with low CH4 loss.The low operating temperature,low feed pressure,and low stage cut were favorable for the high purity CO2 on the permeate side,while the high operating temperature,high pressure,and low stage cut were favorable for the high recovery of CH4 on the residue side.Using this membrane to separate the simulated biogas at 0.2 MPa and 25 ℃ with a stage cut of 0.1,99％of CO2 could be obtained on the permeate side and 99％of CH4 could be recovered on the residue side through a single-stage membrane process.In a wide operating range,the composite membrane prepared in this study could control the CH4 loss within 1％when separating CO2 from biogas,which is a potential membrane for CO2/CH4 separation.关键词
复合膜/二氧化碳捕集/聚酰亚胺/界面聚合/沼气提纯Key words
composite membrane/carbon dioxide capture/polyimide/interface polymerization/biogas purification分类
化学化工引用本文复制引用
丁晓莉,王巍骥,张乾坤,张智铭,赵红永..聚酰亚胺复合膜的制备及其在沼气提纯中的应用[J].天津工业大学学报,2024,43(4):7-11,18,6.基金项目
国家自然科学基金资助项目(21978214) （21978214）
