State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China.
School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
Science. 2021 Jul 16;373(6552):315-320. doi: 10.1126/science.aax5776. Epub 2021 Jul 15.
The development of low-cost, efficient physisorbents is essential for gas adsorption and separation; however, the intrinsic tradeoff between capacity and selectivity, as well as the unavoidable shaping procedures of conventional powder sorbents, greatly limits their practical separation efficiency. Herein, an exceedingly stable iron-containing mordenite zeolite monolith with a pore system of precisely narrowed microchannels was self-assembled using a one-pot template- and binder-free process. Iron-containing mordenite monoliths that could be used directly for industrial application afforded record-high volumetric carbon dioxide uptakes (293 and 219 cubic centimeters of carbon dioxide per cubic centimeter of material at 273 and 298 K, respectively, at 1 bar pressure); excellent size-exclusive molecular sieving of carbon dioxide over argon, nitrogen, and methane; stable recyclability; and good moisture resistance capability. Column breakthrough experiments and process simulation further visualized the high separation efficiency.
开发低成本、高效的物理吸附剂对于气体吸附和分离至关重要；然而，容量和选择性之间固有的权衡，以及传统粉末吸附剂不可避免的成型工艺，极大地限制了它们的实际分离效率。在此，我们采用一锅无模板和无粘结剂的方法，自组装了一种具有精确缩窄微孔通道的超稳定含铁丝光沸石整体式材料。可以直接用于工业应用的含铁丝光沸石整体式材料在 1 巴压力下，分别在 273 和 298 K 时，二氧化碳的体积吸附量达到了创纪录的 293 和 219 立方厘米/立方厘米（材料）；对二氧化碳与氩气、氮气和甲烷具有优异的尺寸排他性分子筛性能；稳定的可循环性；以及良好的耐湿性。柱穿透实验和过程模拟进一步可视化了高分离效率。
