孔空间分区金属有机框架中的替代工程为CO2选择性吸附和固定
Shu-Cong Fan1, Ya-Li Zhang1, Jing-Jing Ni2
1Key Laboratory of Macromolecular Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, Shaanxi 710062, China.
Inorganic chemistry
|November 30, 2023
概括
在金属有机框架 (MOF) 中的替代工程增强了二氧化碳的捕获和催化. 电子捐赠组,特别是基 (-OH),在孔隙空间分区的MOF中显著改善了CO2吸附和转化.
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.
- 环境科学 环境科学
背景情况:
- 在金属有机框架 (MOF) 上的替代工程对于优化气体吸附和催化功能至关重要.
- 孔隙空间分区MOF (PSP MOF) 为研究功能组对MOF性能的影响提供了一个多功能平台.
研究的目的:
- 通过使用PSP MOF,研究各种有机功能组对二氧化碳吸附,分离和催化转化的影响.
- 在二氧化碳利用中,建立替代剂类型和MOF性能之间的结构属性关系.
主要方法:
- 合成12个分区的acs金属有机框架 (pacs-MOFs,SNNU-25-R) 具有不同的电子捐赠和电子接受功能组.
- 通过理想吸附溶液理论 (IAST) 对二氧化碳吸收,二氧化碳2/CH4分离以及二氧化碳循环添加反应中的催化活性进行实验性评估.
主要成果:
- 二氧化碳的吸收在273K和1bar时从30.9cm3g-1到183.6cm3g-1不等,电子捐赠组的表现通常优于电子接受组.
- SNNU-25-OH表现出最高的二氧化碳吸附能力,SNNU-25-CH3显示出最佳的二氧化碳2/CH4选择性 (IAST = 36.1),SNNU-25-OH) 2显示出优越的催化活性.
- 基 (-OH) 功能化导致性能增强,这归因于易斯酸和基与二氧化碳的相互作用.
结论:
- 由替代组调节的MOF的微环境显著影响二氧化碳吸附,分离和催化.
- 这项研究为功能化MOF的合理设计提供了有价值的见解,以实现高效的二氧化碳捕获,分离和转化.
- 基功能化MOF对综合CO2利用应用特别有希望.
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