摘要
多孔液体(PLs)是一种具有稳定永久孔隙结构及流动性的新型材料。以2-甲基咪唑锌盐(ZIF-8)纳米粒子为主体,1-乙基-3-甲基咪唑双(三氟甲磺酰基)亚胺([EMIm][NTf_(2)])为位阻剂,合成了一种Ⅲ型多孔液体。研究了ZIF-8负载量、SO_(2)浓度、SO_(2)流量和温度对PLs吸附性能的影响。结果表明,PLs具有一定的流动性、热稳定性和永久孔隙结构;ZIF-8的加入能显著提高离子液体位阻剂的SO_(2)吸附能力,当ZIF-8负载量为25%时,PLs对SO_(2)的饱和吸附量(0.41 mmol/g)远高于纯离子液体(0.05 mmol/g),ZIF-8与离子液体的协同效应达到61.6%,同时具有较高的吸附速率(0.37 mmol/(g·min))。PLs对SO_(2)的吸附行为符合Avrami吸附动力学模型,PLs主要通过化学键和范德华力的共同作用对SO_(2)进行吸附。PLs经过4次再生后仍具有较高的吸附能力。
Porous liquid(PLs)is a new kind of material with stable permanent pore structure and fluidity.A typeⅢporous liquid was synthesized with 2-methylimidazole zinc salt(ZIF-8)nanoparticles as the main body and 1-ethyl-3-methylimidazole bis(trifluoromethanesulfonyl)imide([EMIm][NTf_(2)])as the steric inhibitor.The effects of ZIF-8 loading,SO_(2) concentration,SO_(2) flow rate and temperature on the adsorption performance of PLs were studied.The results show that PLs has certain fluidity,thermal stability and permanent pore structure.The addition of ZIF-8 can significantly improve the SO_(2) adsorption capacity of ionic liquid steric inhibitor.When the loading capacity of ZIF-8 is 25%,the saturation adsorption capacity of PLs for SO_(2)(0.41 mmol/g)is much higher than that of pure ionic liquid(0.05 mmol/g),the synergistic effect of ZIF-8 and ionic liquid reaches 61.6%,and the adsorption rate of ZIF-8 is higher(0.37 mmol/(g·min)).The adsorption behavior of PLs for SO_(2) conforms to the Avrami adsorption kinetics model.PLs mainly adsorbs SO_(2) through the interaction of chemical bond and van der Waals force.PLs still has high adsorption capacity after 4 times of regeneration.
作者
田宇红
杜壮壮
徐慧芳
祝自强
王宇聪
TIAN Yuhong;DU Zhuangzhuang;XU Huifang;ZHU Ziqiang;WANG Yucong(School of Chemistry and Chemical Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,Shaanxi,China;Key Laboratory of Green Development and Utilization of Nonferrous Metal Resources in Shaanxi Province,Xi’an 710055,Shaanxi,China)
出处
《化工学报》
北大核心
2025年第8期4284-4296,共13页
CIESC Journal
基金
陕西省自然科学基础研究计划面上项目(2025JC-YBMS-528)。
