摘要
选用不同种类的室温型离子液体(RTILs)与胆碱脯氨酸离子液体进行混合分别制得[Choline][Pro]/[EMIm][N(CN)_2]、[Choline][Pro]/[bmim][PF_6]以及[Choline][Pro]/[HMIm][NTf_2]混合离子液体,并将其应用于离子液体支撑液膜(SILMs)。考察操作温度、操作压差、RTILs种类和含量对SILMs分离CO_2/N_2性能的影响。结果表明胆碱脯氨酸/RTILs系列SILMs的CO_2通量在343.3~1936.9 barrer之间变化并且CO_2/N_2选择性为10.3~34.8。对CO_2膜过程内在机制探索表明随着[HMIm][NTf2]离子液体在混合离子液体中比例的增加,总阻力1/Kμ会呈现先降低后升高的趋势。与实验现象中随着[HMIm][NTf2]离子液体在混合离子液体中比例的增加CO_2先升高后降低相符。
Three mixed ionic liquids（[Choline][Pro]/[EMIm][N（CN）2], [Choline][Pro]/[bmim][PF6] and [Choline][Pro]/[HMIm][NTf2]） were prepared by mixing room temperature ionic liquids（RTILs） with [Choline][Pro]. They were used to prepare SILMs by the impregnation method. Effects of operating temperature, pressure, type and content of RTILs on CO2/N2 separation performance of SILMs were investigated. The results showed that the CO2 permeability of the SILMs changed between 343.3—1936.9 barrer and CO2/N2 selectivity was in range of 10.3—34.8. Non-equilibrium thermodynamics was used to analyze CO2 transport mechanism in SILMs. The overall resistance showed a trend from decline to rise by increasing the proportion of [HMIm][NTf2] in the mixed ILs, which was in accordance with CO2 permeability in SILMs.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2017年第7期2771-2780,共10页
CIESC Journal
基金
国家重点基础研究发展计划项目(2013CB733501)
国家自然科学基金项目(21136004
21476106)
江苏省自然科学基金项目(BK20160993)
中国博士后科学基金项目(2016M591837)
江苏高校优势学科建设工程资助项目~~
