子工程在阳离子柱式MOF中用于基准单步C2H4净化来自TernaryC2H2/CO2/C2H4混合物
Lingyao Wang1, Huirong Chen1, Chengye Lou1
1Zhejiang Key Laboratory of Advanced Catalysis and Adsorption Materials, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua, 321004, P.R. China.
Angewandte Chemie (International ed. in English)
|August 4, 2025
概括
这项研究引入了用于高效净化乙烯的离子支柱金属有机框架 (APMOFs). 这些材料实现了高容量的乙和二氧化碳捕获,使得聚合物级乙烯的生产成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 分离科学 分离科学
背景情况:
- 从与乙烯 (C2H2) 和二氧化碳 (CO2) 的三元混合物中净化乙烯 (C2H4),由于具有相似的特性,在工业上具有挑战性.
- 现有的方法难以同时分离这些组件.
研究的目的:
- 为能有效捕获C2H2和CO2的离子支柱金属有机框架 (APMOF) 制定一个子工程策略.
- 从C2H2/CO2/C2H4混合物中实现乙烯的一步净化.
主要方法:
- 合成了两种ZrF62-离子支柱式MOF,ZNU-17和ZNU-27,具有不同的子大小和形状.
- 气体吸附异温和突破试验,以评估分离性能.
- 在现场单晶X射线衍射和密度函数理论 (DFT) 计算以了解结合机制.
主要成果:
- 与ZNU-17相比,ZNU-27显示出优异的三元C2H2/CO2/C2H4分离,而ZNU-17则显示出优异的C2H2/CO2/C2H4分离.
- 对于C2H2 (170.1 cm3 g-1) 和CO2 (91.8 cm3 g-1),ZNU-27的吸附能力显著提高.
- 具有高的CO2/C2H4选择性 (6.5) 和生产高分子级C2H4 (≥99.99%) 的能力,具有高生产率 (12.04mol/kg-1).
结论:
- 在APMOF中的工程是选择性气体捕获的有效策略.
- 对于工业规模的乙烯净化,ZNU-27显示出有前途的迹象.
- 在ZNU-27中的化子为有针对性的气体吸附提供了强烈的相互作用.
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