| 韩铖乐,曹明敏,杨芳,陈玉焕.化学通报,2023,86(8):929-936,928. |
| 离子液体在乙烯/乙烷和乙烯/乙炔分离中的应用 |
| Application of Ionic Liquids for Ethylene/Ethane and Ethylene/Acetylene Separation |
| 投稿时间：2022-12-28 修订日期：2023-01-27 |
| DOI： |
| 中文关键词: 离子液体 乙烯/乙烷 乙烯/乙炔 溶剂吸收 膜分离 吸附分离 |
| 英文关键词:Ionic liquids, ethylene/ethane, ethylene/acetylene, Solvent absorption separation, Membrane separation, Adsorption separation |
| 基金项目: |
|
| 摘要点击次数: 1168 |
| 全文下载次数: 1 |
| 中文摘要: |
| 乙烯，作为石油化工行业的龙头原料，其高效回收分离具有重要的战略意义。离子液体作为一种结构可调控的新型绿色溶剂，在乙烯的回收分离应用中展现出巨大的应用前景。本文总结了近年来离子液体在乙烯/乙烷和乙烯/乙炔分离方面的研究进展，从溶剂吸收、膜吸收和与多孔材料相结合的吸附分离法等角度展开，系统地阐述了常规离子液体、功能化离子液体、聚离子液体等纯组分体系及多组分体系在不同分离方法中的研究现状。溶剂吸收法可以充分利用离子液体的结构可设计性强的优点，对阴阳离子利用不饱和基团或过渡金属离子进行功能化，从而实现乙烯气体的物理溶解到化学吸收。但溶剂吸收法的低选择性和离子液体的高粘度极大地限制了该方法的应用。膜分离法则可以利用离子液体的高粘度特点，通过离子液体膜液体系的筛选实现对乙烯的渗透性和选择性的优化，但膜分离法中选择性和渗透性的同时兼顾及膜稳定性尚有待进一步优化。离子液体与多孔材料相结合的吸附分离法在乙烯吸附分离中展现出优异的选择性和吸附量，且吸附材料的稳定性较不含离子液体的多孔材料有所提升，但目前该方法的研究报道较少。本文通过对各方法研究现状综述，展望了离子液体在乙烯回收分离方面的应用前景和发展趋势。 |
| 英文摘要: |
| Ethylene (C2H4) is one of the most important chemical feedstocks in petrochemical industries. In the chemical process industry, the separation of ethylene from ethane or acetylene is typically via cryogenic distillation at high pressure and very low temperature. However, this technology is costly and energy consuming. Therefore, it is necessary to develop alternative novel separation methods for the sustainable development of olefin industry. Ionic liquids (ILs), as benign media in the separation and purification processes, have received tremendous interest due to the unique and tunable properties resulting from the modifications of the cations and the anions. ILs have been demonstrated as outstanding potential agents for gas separations. In this work, the advances of C2H4/C2H6 and C2H4/C2H2 separation with ILs through solvent absorption, membrane separation and adsorption separation combined with porous materials are summarized. The progress involves pure ILs and multi-components based on conventional ILs, task-specific ILs and polyILs. The advantages and disadvantages of the separation technologies are discussed. For solvent absorption, excellent solubility can be achieved using task-specific ILs by introducing functional groups or transitional metal ions. Membrane separation can take good advantage of the high viscosity, high designability and adjustability of ILs to enhance the permeability and selectivity. ILs combined with porous materials are utilized to greatly improve ethylene separation performance. Furthermore, the prospects for the future development of ethylene separation with ILs are outlined. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|