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完全逆吸附可以从三元C2混合物中单步高纯度C2H2分离到强大的多孔晶体中
Mingxing Zhang1, Jingui Duan2,3,4, Yanfei Feng5
1College of Chemistry and Chemical Engineering, Nantong University, Nantong, Jiangsu, China.
研究人员开发了一种新的多孔晶体,NTU-98,它可以逆转C2碳化合物的吸附选择性. 这一突破使得高纯度乙 (C2H2) 从复杂的混合物中在单个步骤中产生.
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:
- 传统的多孔材料表现出乙烯 (C2H2) 优于乙烯 (C2H4) 和乙 (C2H6) 的吸附.
- 这种固有的选择性对从三元C2混合物中直接净化电子级乙提出了重大挑战.
研究的目的:
- 为了设计具有对C2碳化合物的反向吸附选择性的多孔材料.
- 开发一种方法,从三元C2料中直接生产高纯度的乙.
主要方法:
- 用三甲基/甲基组组合的pyrazole-carboxylate连接剂的功能化,以创建MOF-5类似物.
- 新型金属有机框架 (MOF) 的合成和描述.
- 气体吸附研究和现场晶体分析.
- 密度函数理论 (DFT) 的计算.
主要成果:
- 合成了一种新的MOF,NTU-98,表现出反向吸附选择性:C2H6 > C2H4 > C2H2.2.
- NTU-98允许在室温下从三元C2混合物中直接生产纯度>99.99%的乙.
- 与甲基组的配体功能化被确定为调节宿主-客体相互作用和实现选择性吸附的关键机制.
结论:
- 在多孔晶体中,体功能化提供了一种可行的策略,用于逆转难以分离的吸附选择性.
- NTU-98代表了乙净化技术的重大进步.
- 这项工作为设计适合特定气体分离的微孔材料提供了蓝图.
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