文章基本信息

标题：Mesoporous carbon originated from non-permanent porous MOFs for gas storage and CO2/CH4 separation
本地全文：下载
作者：Wenjing Wang ; Daqiang Yuan
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：4
期号：1
DOI：10.1038/srep05711
语种：English
出版社：Springer Nature
摘要：Four nanoporous carbons prepared by direct carbonization of non-permanent highly porous MOF [Zn₃(BTC)₂ · (H₂O)₃]_n without any additional carbon precursors. The carbonization temperature plays an important role in the pore structures of the resultant carbons. The Brunauer-Emmett-Teller (BET) surface areas of four carbon materials vary from 464 to 1671 m² g⁻¹ for different carbonization temperature. All the four carbon materials showed a mesoporous structure centered at ca. 3 nm, high surface area and good physicochemical stability. Hydrogen, methane and carbon dioxide sorption measurements indicated that the C1000 has good gas uptake capabilities. The excess H₂ uptake at 77 K and 17.9 bar can reach 32.9 mg g⁻¹ and the total uptake is high to 45 mg g⁻¹. Meanwhile, at 95 bar, the total CH₄ uptake can reach as high as 208 mg g⁻¹. Moreover the ideal adsorbed solution theory (IAST) prediction exhibited exceptionally high adsorption selectivity for CO₂/CH₄ in an equimolar mixture at 298 K and 1 bar ( S _ads = 27) which is significantly higher than that of some porous materials in the similar condition.