高等学校化学学报2025，Vol.46Issue(5)：100-108,9.DOI:10.7503/cjcu20240570
多孔聚离子液体催化二氧化碳辅助环氧乙烷水合反应
Porous Poly(ionic liquid)s-catalyzed Carbon Dioxide-promoted Hydration of Ethylene Oxide
摘要
Abstract
As one of the energy-intensive processes,the production of ethylene glycol with high selectivity from ethylene oxide under low hydration ratios is a challenge in the industry.In this study,a series of porous poly(ionic liquid)s with high specific surface area and macroporous structure were synthesized through free radical copoly-merization of rigid ionic liquids and organic base monomers.The structure,microscopic morphology,and thermal stability of the poly(ionic liquid)s were characterized by magic angle spinning nuclear magnetic resonance(MAS NMR)spectroscopy,Fourier transform infrared(FTIR)spectroscopy,scanning electron microscopy(SEM),N2 physical adsorption-desorption,and thermogravimetric analysis(TGA).These poly(ionic liquid)s have a specific surface area ranging from 100.9 m²/g to 374.7 m²/g,a pore volume ranging from 0.41 cm³/g to 0.86 cm³/g,with active sites uniformly distributed within the porous structure.Porous poly(ionic liquid)s possessing both the active centers of ionic liquids and organic bases could synergistically catalyze the CO2-promoted hydration of ethylene oxide.Under a low hydration ratio of 1.5∶1,high yield(96.5%)and selectivity(96.5%)of ethylene glycol are achieved,which are comparable to the corresponding homogeneous catalysts.The CO2-promoted catalysis alters the pathway of hydration reaction,significantly reducing the hydration ratio and improving the selectivity of ethylene glycol.In addition,the catalyst has good substrate applicability and recyclability,and it also shows good catalytic performance under the flue gas atmosphere.关键词
乙二醇/环氧乙烷/多孔聚离子液体/二氧化碳辅助水合反应Key words
Ethylene glycol/Ethylene oxide/Porous poly(ionic liquid)s/CO2-promoted hydration reaction分类
化学化工引用本文复制引用
洪扬,李丹丹,张景顺,章子旺,高国华..多孔聚离子液体催化二氧化碳辅助环氧乙烷水合反应[J].高等学校化学学报,2025,46(5):100-108,9.基金项目
国家自然科学基金(批准号:22172053)和国家重点研发计划项目(批准号:2020YFA0710201)资助. Supported by the National Natural Science Foundation of China(No.22172053)and the National Key Research and Development Program of China(No.2020YFA0710201). （批准号:22172053）
