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Robust ultra-microporous metal-organic frameworks for highly efficient natural gas purification

Nano Research 2023年第10期16卷 12338-12344页

作者： Li Zhao Pengxiao Liu Chenghua Deng Ting Wang Sha Wang Yong-Jun Tian Jin-Sheng Zou Xue-Cui Wu Ying Zhang Yun-Lei Peng Zhenjie Zhang Michael J.Zaworotko Department of Applied Chemistry College of ScienceChina University of Petroleum(Beijing)Beijing 102249China College of Chemistry Nankai UniversityTianjin 300071China State Key Laboratory of Heavy Oil Processing China University of Petroleum(Beijing)Beijing 102249China Department of Chemical Sciences Bernal InstituteUniversity of LimerickLimerick V94T9PXRepublic of Ireland Basic Research Centre for Energy Interdisciplinary China University of Petroleum(Beijing)Beijing 102249China Department of Materials Science and Engineering College of New Energy and MaterialsChina University of Petroleum(Beijing)Beijing 102249China

The development of highly efficient separation technology for the purification of natural gas by removing ethane(C_(2)H_(6))and propane(C_(3)H_(8))is a crucial but challenging task to their efficient utilization in the chemical industry and social ***,we report three isomorphic ultra-microporous metal-organic frameworks(MOFs),M-pyz(M=Fe,Co,and Ni,and pyz=pyrazine)referred to as Fe-pyz,Co-pyz,and Ni-pyz,respectively,which possess high density of open metal sites and suitable pore *** with the benchmark materials reported,M-pyz not only has high adsorption capacities of C_(2)H_(6)and C_(3)H_(8)at low pressure(up to 51.6 and 63.7 cm^(3)·cm^(−3)),but also exhibits excellent C_(3)H_(8)/CH_(4)and C_(2)H_(6)/CH_(4)ideal adsorption solution theory(IAST)selectivities,111 and 25,*** calculations demonstrated that the materials’separation performance was driven by multiple intermolecular interactions(hydrogen bonding interactions and van der Waals effect)between gas molecules(C_(2)H_(6)and C_(3)H_(8))and the M-pyz binding ***,dynamic breakthrough experiments verified the superior reusability and practical separation feasibility for the ternary CH_(4)/C_(2)H_(6)/C_(3)H_(8)***,M-pyz can be synthesized rapidly and on a large scale at room *** work presents a series of promising MOFs adsorbents to efficiently purify natural gas and promotes the industrial development process of MOFs materials.

关键词： natural gas methane adsorption separation ultra-microporous metal-organic frameworks(MOFs)

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