首页 | 官方网站   微博 | 高级检索  
     

N-杂环离子液体液固相变吸收SO2
引用本文:谢旭豪,陈玲,许胜超,赵文波.N-杂环离子液体液固相变吸收SO2[J].化工进展,2019,38(12):5603-5611.
作者姓名:谢旭豪  陈玲  许胜超  赵文波
作者单位:昆明理工大学化学工程学院,云南昆明,650500
基金项目:国家自然科学基金(21306071)
摘    要:采用不同N含量及碱性的六元N-杂环三级胺与不同酸性的有机羧酸直接中和制备了一系列离子液体,并将其用于SO2的捕集,发现制得的部分离子液体可液固相变吸收SO2。通过探究不同N-杂环离子液体对SO2的吸收负载量,发现离子液体的SO2吸收性能受阳离子N含量以及阴、阳离子的pKa共同影响。采用XRD、FTIR、元素分析、单晶衍射等表征手段对1,3,5-三甲基六氢-1,3,5-三嗪乙酸盐离子液体相变吸收SO2的产物进行分析,单晶解析发现固体吸收产物为甲胺基甲磺酸,并进一步推测了该离子液体吸收SO2的反应过程与相变机理,反应过程先是1,3,5-三甲基六氢-1,3,5-三嗪在酸性条件下分解成亚甲基甲胺,然后由于SO2的亲核作用,导致亚甲基甲胺碳氮双键的断裂和产物碳硫单键的形成。

关 键 词:离子液体  二氧化硫  相变  吸收  甲胺基甲磺酸
收稿时间:2019-04-09

Liquid-solid phase change absorption of SO2 by N-heterocyclic ionic liquid
Xuhao XIE,Ling CHEN,Shengchao XU,Wenbo ZHAO.Liquid-solid phase change absorption of SO2 by N-heterocyclic ionic liquid[J].Chemical Industry and Engineering Progress,2019,38(12):5603-5611.
Authors:Xuhao XIE  Ling CHEN  Shengchao XU  Wenbo ZHAO
Affiliation:Faculty of Chemical Engineering,Kunming University of Science and Technology,Kunming 650500,Yunnan,China
Abstract:A serial of ionic liquids were prepared by direct neutralization of six-membered N-heterocyclic tertiary amine with different nitrogen contents and alkaline using organic carboxylic acids with different acidities. The ionic liquids were then used for SO2 capture and some of them showed the phase change absorption behavior. By exploring the SO2 absorption capacity using different N-heterocyclic ionic liquids, we found that the SO2 absorption is affected by the cationic nitrogen content of ionic liquids as well as the pKa value of the anions and cations. Using XRD, FTIR, elemental analysis and single crystal diffraction, we analyzed the phase change products of SO2 absorption by 1,3,5-trimethylhexahydro-1,3,5-triazine acetate ionic liquid, and the solid absorption product was found to be methylaminomethanesulfonic acid. It is further speculated that 1,3,5-trimethylhexahydro-1,3,5-triazine is first decomposed into methylene methylamine under acidic conditions, and then, due to the nucleophilic attack of SO2, the carbon-nitrogen double bond in methylene methylamine is broken with the formation of the carbon-sulfur single bond.
Keywords:ionic liquids  sulfur dioxide  phase change  absorption  methylaminomethanesulfonic acid  
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《化工进展》浏览原始摘要信息
点击此处可从《化工进展》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号