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首页> 外文期刊>Advanced Materials >Construction of a Porous Metal-Organic Framework with a High Density of Open Cr Sites for Record N_2/O_2 Separation
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Construction of a Porous Metal-Organic Framework with a High Density of Open Cr Sites for Record N_2/O_2 Separation

机译：具有高密度开口Cr部位的多孔金属有机框架的构建，用于记录N_2 / O_2分离

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摘要

The removal of low concentration N-2 is of great significance and challenging in the industrial production of high-purity O-2. Herein, a chromium-based metal-organic framework, namely, TYUT-96Cr, is reported, which has an unprecedented N-2 capture capacity of 37.46 cm(3) cm(-3) and N-2/O-2 (5:95, v/v) selectivity up to 26.95 (298 K and 1 bar), thus setting new benchmarks for all reported metal-organic frameworks and commercially used ones (Li-LSX and 13X). Breakthrough experiments reveal that N-2 can be directly extracted from various N-2/O-2 (79:21, 50:50, 5:95, and 1:99, v/v) mixtures by this material, affording a record-high O-2-production scale with 99.99% purity. Density functional theory calculations and in situ infrared spectroscopy studies demonstrate that the high-density open Cr (III) sites in TYUT-96Cr can behave as effective Lewis acidic sites, thus resulting in a strong affinity toward N-2. The high N-2 adsorption selectivity, exceptional separation performance, and ultrahigh structural stability render this porous material with great potential for this important industrial application.
机译：低浓度N-2的去除是高纯度O-2的工业生产具有重要意义和挑战性。在此，报告了一种基于铬基金属 - 有机骨架，即Tyut-96cr，其具有前所未有的N-2捕获容量为37.46cm（3）cm（-3）和N-2 / O-2（5 ：95，v / v）选择性高达26.95（298 k和1 bar），从而为所有报告的金属有机框架和商业用过的项目设定新的基准（Li-LSX和13x）。突破实验表明，通过这种材料，可以直接从各种N-2 / O-2（79:21,50:50,5:95和1:95，v / v）混合物中直接提取N-2。 - 高o-2-生产规模，纯度为99.99％。密度函数理论计算和原位红外光谱研究表明，Tyut-96cr中的高密度开放Cr（III）位点可以表现为有效的路易斯酸性位点，从而导致朝向N-2的强烈亲和力。高N-2吸附选择性，卓越的分离性能和超高结构稳定性使得这种多孔材料具有这一重要的工业应用的潜力。

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  • 来源
    《Advanced Materials》 |2021年第37期|2100866.1-2100866.7|共7页
  • 作者

    Zhang Feifei; Shang Hua; Wang Li; Wang Yong; Yang Jiangfeng; Xia Yuanhua; Li Hao; Li Libo; Li Jinping;

  • 作者单位

    Taiyuan Univ Technol Coll Chem & Chem Engn Shanxi Key Lab Gas Energy Efficient & Clean Utili Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Coll Chem & Chem Engn Shanxi Key Lab Gas Energy Efficient & Clean Utili Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Coll Chem & Chem Engn Shanxi Key Lab Gas Energy Efficient & Clean Utili Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Coll Chem & Chem Engn Shanxi Key Lab Gas Energy Efficient & Clean Utili Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Coll Chem & Chem Engn Shanxi Key Lab Gas Energy Efficient & Clean Utili Taiyuan 030024 Shanxi Peoples R China;

    China Acad Engn Phys Key Lab Neutron Phys Mianyang 621999 Sichuan Peoples R China|China Acad Engn Phys Inst Nucl Phys & Chem Mianyang 621999 Sichuan Peoples R China;

    China Acad Engn Phys Key Lab Neutron Phys Mianyang 621999 Sichuan Peoples R China|China Acad Engn Phys Inst Nucl Phys & Chem Mianyang 621999 Sichuan Peoples R China;

    Taiyuan Univ Technol Coll Chem & Chem Engn Shanxi Key Lab Gas Energy Efficient & Clean Utili Taiyuan 030024 Shanxi Peoples R China|Taiyuan Univ Technol Key Lab Coal Sci & Technol Minist Educ & Shanxi Prov Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Coll Chem & Chem Engn Shanxi Key Lab Gas Energy Efficient & Clean Utili Taiyuan 030024 Shanxi Peoples R China;

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  • 正文语种 eng
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  • 关键词

    high-purity O; (2); Lewis acid sites; metal-organic frameworks; N; (2); O; (2) separation; open Cr sites;

    机译：高纯度o;（2）;路易斯酸遗址;金属 - 有机框架;n;（2）;o;（2）分离;开放CR网站;

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