Chen Qiang, Xian Shikai, Dong Xinglong, Liu Yanyao, Wang Hao, Olson David H, Williams Lawrence J, Han Yu, Bu Xian-He, Li Jing
School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin, 300350, China.
Department of Chemistry and Chemical Biology, Rutgers University, 123 Bevier Road, Piscataway, NJ, 08854, USA.
Angew Chem Int Ed Engl. 2021 May 3;60(19):10593-10597. doi: 10.1002/anie.202100707. Epub 2021 Mar 30.
The separation of n-alkanes from their branched isomers is vitally important to improve octane rating of gasoline. To facilitate mass transfer, adsorptive separation is usually operated under high temperatures in industry, which require considerable energy. Herein, we present a kind of dynamic pillar-layered MOF that exhibits self-adjustable structure and pore space, a behavior induced by guest molecules. A combination of the flexibility of the framework with the commensurate adsorption for n-hexane results in exceptional performance in separating hexane isomers. More significantly, lower temperature prompts the guest molecules to open the dynamic pores, which may provide a new perspective for optimized separation performance at lower temperatures with less energy consumption.
将正构烷烃与其支链异构体分离对于提高汽油辛烷值至关重要。为了促进传质，吸附分离在工业上通常在高温下进行，这需要大量能量。在此，我们展示了一种动态柱层状金属有机框架材料，它表现出由客体分子诱导的结构和孔隙空间自调节行为。框架的灵活性与对正己烷的适度吸附相结合，使其在分离己烷异构体方面表现出卓越性能。更重要的是，较低温度促使客体分子打开动态孔隙，这可能为在较低温度下以更低能耗优化分离性能提供新的视角。
