氯化镍低共熔溶剂用于氨气的高效分离回收  

Nickel chloride-based deep eutectic solvents for efficient separation and recovery of NH 3

作　　者：孙晓雪 吴胜寒 王清华 郝敬爱 魏莉 SUN Xiaoxue;WU Shenghan;WANG Qinghua;HAO Jingai;WEI Li(School of Light Industry and Chemical Engineering,Dalian Polytechnic University,Dalian 116034,China)

机构地区：[1]大连工业大学轻工与化学工程学院,辽宁大连116034

出　　处：《大连工业大学学报》2023年第3期201-205,共5页Journal of Dalian Polytechnic University

基　　金：离子液体清洁过程北京市重点实验室开放基金项目(228002021300)。

摘　　要：氨的吸附/吸收与能源利用和环境保护紧密相关。设计合成了用于氨吸收的金属基低共熔溶剂NiCl_(2)/间苯二酚(Res)/乙二醇(EG),考察了NiCl_(2)含量、温度、氨分压等对氨气吸收性能的影响以及溶剂的NH_(3)/CO_(2)选择性和重复利用性能。结果表明,添加少量的NiCl_(2)可明显提高氨的吸收量,在40℃、0.10 MPa下NiCl_(2)/Res/EG(0.1∶1∶2)的NH_(3)吸收量达到0.218 g/g,相比不含NiCl_(2)的溶剂,NH_(3)吸收量提高了36.25%(质量分数)。^(1)H-NMR和FT-IR谱图分析结果表明,该体系对氨气的吸收机理主要为氢键和Lewis酸碱作用的协同作用。The absorption or adsorption of ammonia was closely related to the energy utilization and environmental protection.A type of NiCl_(2)-based deep eutectic solvent,i.e.,NiCl_(2)/resorcinol(Res)/ethylene glycol(EG)were synthesized for ammonia absorption.Additionally,the effects of NiCl_(2)content,temperature and ammonia partial pressure on their absorption performance to ammonia,as well as NH_(3)/CO_(2)selectivity and reversibility were investigated.The small amount of NiCl_(2)in solvent could significantly improve the absorption ability to NH_(3).The absorption capacity to NH_(3)by NiCl_(2)/Res/EG(0.1∶1∶2)at 40℃and 0.10 MPa was up to 0.218 g/g.Compared with the solvent without NiCl_(2),the absorption capacity to NH_(3)was increased by 36.25%.The results of^(1)H-NMR and FT-IR techniques confirmed that the absorption of ammonia mechanism was mainly due to the synergy effect of hydrogen bonding and Lewis acid-base interaction.

关 键 词：氨气 低共熔溶剂 氯化镍 Lewis酸碱作用 

分 类 号：TQ028.1[化学工程]