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<p>A current challenge for natural gas adsorbed storage technology is to find specialized adsorbent materials that are able to store and deliver large amounts of methane (CH<sub>4</sub>) near room temperature and at low pressures. In this study, bimetallic MOFs is supported on nitrogen-doped carbon foam derived from melamine (MC@NZn) by vacuum impregnation process as an adsorbent for CH<sub>4</sub> storage. The nitrogen-doped carbon foam with macroporous internetwork combined with high surface area and micro-/mesoporous structure of the NiZn-MOF leads a hierarchical porous structure, which provides efficient and rapid pathways for the penetration of CH<sub>4</sub> molecules and more active sites for CH<sub>4</sub> adsorption. Experimental results show that MC@NZ4 exhibits a CH<sub>4</sub> adsorption capacity of 105.80 cm<sup>3</sup>·g<sup>-1</sup> under 298&#xa0;K and 60&#xa0;bar with isosteric heat of adsorption of 10.71&#xa0;kJ·mol<sup>-1</sup>. Furthermore, MC@NZ4 achieves a CH<sub>4</sub>/N<sub>2</sub> adsorption selectivity of 5.63, indicating its potential for CH<sub>4</sub> adsorption. This work provides a simple method to combine MOF powders with three-dimensional skeleton substrate material to fabricate monolithic solid porous materials, which can find potential applications in gas adsorption.</p>

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Melamine-derived nitrogen-doped carbon foam supported bimetallic NiZn-MOFs as an efficient adsorbent for CH4 storage

  • 期刊论文

  • 发表日期：

    2025年2月15日

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  • Xu Zhang,
  • Xiaoqian Peng,
  • Shaojun Liu,
  • Xiaochan Liu,
  • Guoran Liu,
  • Rongshuang Liu,
  • Jiale Niu,
  • Zhipeng Yuan,
  • Jing Zhang,
  • Xibin Yi,
  • Serguei Filatov

摘要

A current challenge for natural gas adsorbed storage technology is to find specialized adsorbent materials that are able to store and deliver large amounts of methane (CH4) near room temperature and at low pressures. In this study, bimetallic MOFs is supported on nitrogen-doped carbon foam derived from melamine (MC@NZn) by vacuum impregnation process as an adsorbent for CH4 storage. The nitrogen-doped carbon foam with macroporous internetwork combined with high surface area and micro-/mesoporous structure of the NiZn-MOF leads a hierarchical porous structure, which provides efficient and rapid pathways for the penetration of CH4 molecules and more active sites for CH4 adsorption. Experimental results show that MC@NZ4 exhibits a CH4 adsorption capacity of 105.80 cm3·g-1 under 298 K and 60 bar with isosteric heat of adsorption of 10.71 kJ·mol-1. Furthermore, MC@NZ4 achieves a CH4/N2 adsorption selectivity of 5.63, indicating its potential for CH4 adsorption. This work provides a simple method to combine MOF powders with three-dimensional skeleton substrate material to fabricate monolithic solid porous materials, which can find potential applications in gas adsorption.