聚酰亚胺中空纤维膜分离CH_4/CO_2的影响因素分析  

Influence Factors on CH_4/CO_2 Separation by Membrane of Polyimide Hollow Fiber

作　　者：葛昕[1] 李晖[1] 李布青[1] 杨智良[2] 代学猛 代永志 李希[2] 

机构地区：[1]安徽省农业科学院农业工程研究所,安徽合肥230031 [2]安徽农业大学工学院,安徽合肥230026 [3]安徽永志环能科技有限公司,安徽阜阳236300

出　　处：《中国沼气》2017年第1期13-16,共4页China Biogas

摘　　要：沼气的膜净化提纯技术是沼气高值利用的重要途径之一。文章利用聚酰亚胺中空纤维膜,以CH_4/CO_2混合气体(CH_4∶CO_2为6∶4 v/v)模拟沼气,研究了原料气压力,气体流速和分压对分离过程的影响,尤其是CH_4和CO_2的浓度影响。结果表明:原料气压力主要影响膜通量,对CH_4含量的影响程度较小,而分压能有效调节尾气中CH_4的含量,流速与CH_4的浓度呈负相关。Purifying biogas by membrane technology is an important way for improving the biogas utilization value. The imitated biogas（ CH4∶ CO2= 6∶ 4 v/v） was used as feedstock gas to study the effect of feed gas pressure,gas flow rate,and partial pressure,specially the CH4,CO2 concentration,on the biogas purification were investigated. The result showed that the feed gas pressure mainly affect the membrane flux,less impact on the CH4 content. The partial pressure could effectively adjust the content of CH4 in tail gas. And the flow rate had negative correlation with the concentration of CH4.

关 键 词：聚酰亚胺 中空纤维膜 沼气 膜分离 

分 类 号：S216.4[农业科学—农业机械化工程]