One‐step CH4 purification from C2‐hydrocarbons and CO2 gas impurities is essential in the quest for clean energy resources amidst the growing energy crisis. While MOF materials have demonstrated significant progress in binary C2H2/CH4, C2H4/CH4, C2H6/CH4, and CO2/CH4 separations, there is a growing emphasis on purification of CH4 from multicomponent gas mixtures using a single adsorbent. Toward this direction, a 2D MOF: IITKGP‐27, {[Zn(MBPz)(SO2DBA)]·4H2O}n featuring rhombus pores decorated with polar functionalities has been strategically constructed displaying remarkable chemical robustness in water for 7 days, across wide pH range (pH=2‐12), and in open air for 30 days. Interestingly, IITKGP‐27 selectively adsorb C2 hydrocarbons (C2H2, C2H4 and C2H6) and CO2 over CH4, attributed to the synergistic effect of favorable host‐guest interactions due to the presence of accessible surface functionalities and optimal pore apertures. Moreover, an excellent trade‐off between high sorption capacities and moderate separation selectivities were achieved. Transient breakthrough simulations further validated it’s feasibility toward unexplored CH4 purification from a blend of all such five gases, demonstrating its viability for this critical application. In addition, the bulk scalability, ease of regeneration, excellent recyclability and outstanding structural stability highlight its potential as a robust solution for efficient CH₄ purification from natural gas streams.

中文翻译：

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一种化学稳定性极强的 2D Zn-MOF 作为从多组分气体混合物中一步法净化甲烷的有前途的吸附剂


在日益严重的能源危机中，从 C2-碳氢化合物和 CO2 气体杂质中一步纯化 CH4 对于寻求清洁能源资源至关重要。虽然 MOF 材料在二元 C2H2/CH4、C2H4/CH4、C2H6/CH4 和 CO2/CH4 分离方面取得了重大进展，但人们越来越强调使用单一吸附剂从多组分气体混合物中纯化 CH4。朝这个方向，战略性地构建了具有修饰有极性官能团的菱形孔的 2D MOF：IITKGP-27， {[Zn（MBPz）（SO2DBA）]·4H2O}n，在水中 7 天、宽 pH 范围 （pH=2-12） 和露天 30 天。有趣的是，IITKGP-27 在 CH4 上选择性地吸附 C2 碳氢化合物（C2H2、C2H4 和 C2H6）和 CO2，这归因于由于存在可接近的表面官能团和最佳孔径而产生的有利主客体相互作用的协同效应。此外，在高吸附能力和中等分离选择性之间实现了出色的平衡。瞬态突破性模拟进一步验证了从所有此类五种气体的混合物中纯化未开发的 CH4 的可行性，证明了其在这一关键应用中的可行性。此外，其体积可扩展性、易于再生、出色的可回收性和出色的结构稳定性凸显了其作为从天然气流中高效净化 CH₄ 的稳健解决方案的潜力。