Pang Jiandong, Jiang Feilong, Wu Mingyan, Liu Caiping, Su Kongzhao, Lu Weigang, Yuan Daqiang, Hong Maochun
1] State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China [2] University of Chinese Academy of Sciences, Beijing 100049, China.
State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
Nat Commun. 2015 Jun 30;6:7575. doi: 10.1038/ncomms8575.
Acetylene, an important petrochemical raw material, is very difficult to store safely under compression because of its highly explosive nature. Here we present a porous metal-organic framework named FJI-H8, with both suitable pore space and rich open metal sites, for efficient storage of acetylene under ambient conditions. Compared with existing reports, FJI-H8 shows a record-high gravimetric acetylene uptake of 224 cm(3) (STP) g(-1) and the second-highest volumetric uptake of 196 cm(3) (STP) cm(-3) at 295 K and 1 atm. Increasing the storage temperature to 308 K has only a small effect on its acetylene storage capacity (∼200 cm(3) (STP) g(-1)). Furthermore, FJI-H8 exhibits an excellent repeatability with only 3.8% loss of its acetylene storage capacity after five cycles of adsorption-desorption tests. Grand canonical Monte Carlo simulation reveals that not only open metal sites but also the suitable pore space and geometry play key roles in its remarkable acetylene uptake.
乙炔作为一种重要的石化原料，由于其具有高度爆炸性，在压缩状态下很难安全储存。在此，我们展示了一种名为FJI-H8的多孔金属有机框架，它具有合适的孔隙空间和丰富的开放金属位点，可在环境条件下高效储存乙炔。与现有报道相比，FJI-H8在295K和1个大气压下的乙炔重量吸附量达到创纪录的224 cm³（标准温度和压力）g⁻¹，体积吸附量为196 cm³（标准温度和压力）cm⁻³，位居第二。将储存温度提高到308K对其乙炔储存容量的影响很小（约200 cm³（标准温度和压力）g⁻¹）。此外，FJI-H8表现出出色的重复性，在经过五个循环的吸附-解吸测试后，其乙炔储存容量仅损失3.8%。巨正则蒙特卡罗模拟表明，不仅开放金属位点，而且合适的孔隙空间和几何形状在其显著的乙炔吸附中都起着关键作用。
