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                                                                              Prof. Wang Jun’s Team Releasing the Latest Research Achievement in JACS

                                                                              Recently, the latest research achievement of Professor Wang Jun’s team of School of Resources Environmental & Chemical Engineering was published as Optimizing Pore Space for Flexible-Robust Metal-Organic Framework to Boost Acetylene Removal in the international authoritative Journal of the American Chemical Society. NCU is the first completion unit. It is the first article of chemical engineering of NCU published in JACS as well as a landmark achievement of this discipline through rapid development in recent years.

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                                                                              Prof. Wang Jun and Dr. Zhang Yan of NCU are the first co-authors of the thesis and Prof. Deng Shuguang of Arizona State University, Prof. Xing Huabin of Zhejiang University, Dr. Lin Ruibiao and Prof. Chen Banglin of University of Texas at San Antonio, the USA are corresponding authors.

                                                                              Through cooperation with domestic and overseas scientific research teams, Prof. Wang Jun has produced a new kind of flexible-robust MOFs material with robust pore spaces and flexible stratified spaces (Nanchang University-100, NCU-100). It has realized precise regulation of pore canal dimensions in an extremely small sphere and makes it maintain a rigid pore canal to absorb acetylene molecules even when the guest phase is removed. At the same time, he obtained the single-crystal structure of the acetylene molecule load and pointed out exactly where acetylene is being absorbed in the pore canal, thus solving the problem about trace acetylene removal from flexible MOFs materials. At a higher pressure, its stratified structure can be selectively stretched by acetylene molecules to realize acetylene absorption of a higher capacity. Through analysis of the crystal structure and theoretical calculation, it is proved that its optimized pore canal dimensions and multiple adsorption sites have achieved excellent removal of trace c2H2 from NCU-100 material and a very high c2H2 absorption capacity. The penetration and separation experiment about the mixed gas of binary components and multiple components proves that NCU-100a can remove trace acetylene from ethylene effectively and synchronously at normal pressure and temperature and that the separation effect is very efficient.

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                                                                              Figure about Acting Sites between Acetylene and MOFs Material under Different Absorption Pressures and Schematic Diagram about Ethylene Purification

                                                                              The results of the experiments and theories show that the robust pore space in the new type of robust-flexible MOFs material is very effective to removing trace acetylene impurities from the gas mixture c2H2/c2H4 (1:99). The work has not only provided a new train of thought for designing reasonable poly porous MOFs materials but also has provided a new way for solving the difficulty about gas adsorption separation.


                                                                              Paper link: https://pubs.acs.org/doi/10.1021/jacs.0c02594



                                                                              • Source : Nanchang University
                                                                              • Date : 2020-05-18


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