High-throughput gas separation by flexible metal-organic frameworks with fast gating and thermal management capabilities
High-throughput gas separation by flexible metal-organic frameworks with fast gating and thermal management capabilities
复制标题
DOI：
10.1038/s41467-020-17625-3
复制
发表时间：
2020-08-03
影响因子：
16.6
通讯作者：
Tanaka, Hideki
中科院分区：
文献类型：
--
作者：
Hiraide, Shotaro;Sakanaka, Yuta;Tanaka, Hideki
建立使用多孔材料的新型节能气体分离系统对于确保可持续的未来是必不可少的。在本文中，我们表明ELM-11（[Cu（BF 4）（2）（4，4-bipyridine）（2）]（n）），柔性金属有机框架（MOFs）的成员，表现出对气体进料的快速响应性和源自气体吸附（门打开）时的结构变形的“内在热管理”能力。这两个特性适合于开发具有快速操作的压力真空变压吸附（PVSA）系统。结合实验和理论研究表明，ELM-11能够通过绝热操作从CO2/CH 4气体混合物中高通量分离CO2，这是快速变压真空吸附的极端条件。我们还提出了一个可操作的解决方案的“滑落”的问题，这是灵活的MOFs不能吸附目标分子时，目标气体的分压下降到低于开闸压力。此外，我们提出的系统比传统的系统的优越性证明。pid =Par工业中的分离过程使用大量能源，为了可持续性，应开发节能的纯化系统。在这里，作者报道了一种灵活的金属有机框架，用于在压力真空变压吸附系统中从CO2/CH 4气体混合物中高通量分离CO2。
Establishing new energy-saving systems for gas separation using porous materials is indispensable for ensuring a sustainable future. Herein, we show that ELM-11 ([Cu(BF4)(2)(4,4-bipyridine)(2)](n)), a member of flexible metal-organic frameworks (MOFs), exhibits rapid responsiveness to a gas feed and an 'intrinsic thermal management' capability originating from a structural deformation upon gas adsorption (gate-opening). These two characteristics are suitable for developing a pressure vacuum swing adsorption (PVSA) system with rapid operations. A combined experimental and theoretical study reveals that ELM-11 enables the high-throughput separation of CO2 from a CO2/CH4 gas mixture through adiabatic operations, which are extreme conditions in rapid pressure vacuum swing adsorption. We also propose an operational solution to the 'slipping-off' problem, which is that the flexible MOFs cannot adsorb target molecules when the partial pressure of the target gas decreases below the gate-opening pressure. Furthermore, the superiority of our proposed system over conventional systems is demonstrated. p id=Par Separation processes in industry use substantial energy and energy-efficient purification systems should be developed for sustainability. Here the authors report a flexible metal-organic framework for high-throughput separation of CO2 from a CO2/CH4 gas mixture in a pressure vacuum swing adsorption system.