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在Co (II) -Pyrazolate框架内从潮湿的SF₆/N₂混合物中回收高纯度SF₆

Xin Zhang¹, Yan-Long Zhao¹, Xiang-Yu Li¹

¹Beijing Key Laboratory for Green Catalysis and Separation and Department of Chemical Engineering, College of Materials Science & Engineering, Beijing University of Technology, Beijing 100124, PR China.

Journal of the American Chemical Society

|July 6, 2024

概括

一个新的金属有机框架,BUT-53,有效地从工业废气中捕获硫六化物 (SF₆). 这一突破使得高纯度的SF₆可回收,这对于可持续能源实践和温室气体排放减轻至关重要.

科学领域:

材料科学
环境化学
化学工程

背景情况:

六化硫 (SF₆) 是一种在电力行业中广泛使用的强效温室气体.
可持续的SF管理需要有效地回收工业排放.
目前的SF6净化方法面临重大挑战.

研究的目的:

从N2混合物中开发一种选择性硫六化物 (SF₆) 的材料.
研究一种新型的酸MOF,BUT-53的吸附分离能力.
了解SF6吸附的机制及其对湿度的耐受性.

主要方法:

使用定制金属有机框架 (MOF) 的吸附分离,BUT-53.
在特定条件下测量气体吸附量和选择性.
突破性的实验证明了SF6的净化效率.
分子模拟,单晶衍射和吸附动力学分析.

主要成果:

BUT-53 显示了高的SF₆吸附量 (2.82 mmol/ g 在0. 1 bar, 298 K).
在10:90的混合物中获得了2485的前所未有的SF₆/N₂选择性.
通过突破性实验从低度的混合物中获得高纯度的SF₆ (>99.9%).
在多个循环中,该材料在潮湿条件下 (90%RH) 保持出色的分离效率.

结论:

BUT-53是一种高效的SF6缩和净化材料.
在BUT-53中的动态分子陷促进了选择性SF₆吸附.
MOF的稳定性和耐水性使其适用于工业应用.
这项工作为电力部门的可持续SF管理提供了有希望的解决方案.

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