KOH活化法制备气体分离用炭分子筛膜  

Preparation of carbon molecular sieve membranes by KOH activation for gas separation

作　　者：张小勇[1,2] 刘锐[2] 胡浩权[1] 郑明东[2] 

机构地区：[1]大连理工大学煤化工研究所,精细化工国家重点实验室,辽宁大连116012 [2]安徽工业大学化学与化工学院煤洁净转化与综合利用安徽省重点实验室,安徽马鞍山243002

出　　处：《新型炭材料》2012年第1期61-66,共6页New Carbon Materials

基　　金：国家重点基础研究发展计划项目(2005CB221202)~~

摘　　要：选用KOH为活化剂,利用化学活化法制备炭分子筛膜,考察在热塑性酚醛树脂(PFNR)涂膜液中添加不同质量分数的KOH对炭分子筛膜的影响。结果表明,在炭化过程中,KOH的加入可促进炭分子筛膜孔径的均匀分布,使炭分子筛膜具有发达的孔隙结构。当KOH在PFNR中的添加量从0%增加到4%时,H2的渗透速率由23.68×10-10 mol.m-.2s-.1Pa-1提高到28.6×10-10 mol.m-.2s-.1Pa-1;但H2/N2和H2/CH4的分离系数明显下降,分别从471.3下降到147.5、540下降到270。CO2/CH4和O2/N2的分离系数只有轻微下降。Carbon molecular sieve membranes were prepared by the pyrolysis of a mixture containing phenolic novolac resin and KOH. The effects of KOH on the properties of the membranes were investigated. Results showed that membranes with homogeneous pore size distributions and high gas permeation rates can be obtained by controlling the amount of KOH Their H2 gas permeability increased from 23.68x10-10 to 28.6x10-10 mol.m-2-s-1.Pa -1 and H2/N2 and HJCH4 selectivity decreased from 471.3 to 147.5 and 540 to 270 respectively, while the CO2/CHa and O2/N2 selectivity changed little with increasing KOH content in the coating solution from 0 to 4 mass%.

关 键 词：热塑性酚醛树脂 炭分子筛膜 活化 气体分离 KOH 

分 类 号：TB43[一般工业技术]