Peng Yun-Lei, Pham Tony, Li Pengfei, Wang Ting, Chen Yao, Chen Kai-Jie, Forrest Katherine A, Space Brian, Cheng Peng, Zaworotko Michael J, Zhang Zhenjie
College of Chemistry, Nankai University, Tianjin, 300071, China.
Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, CHE205, Tampa, Florida, 33620-5250, USA.
Angew Chem Int Ed Engl. 2018 Aug 20;57(34):10971-10975. doi: 10.1002/anie.201806732. Epub 2018 Jul 20.
Highly selective separation and/or purification of acetylene from various gas mixtures is a relevant and difficult challenge that currently requires costly and energy-intensive chemisorption processes. Two ultramicroporous metal-organic framework physisorbents, NKMOF-1-M (M=Cu or Ni), offer high hydrolytic stability and benchmark selectivity towards acetylene versus several gases at ambient temperature. The performance of NKMOF-1-M is attributed to their exceptional acetylene binding affinity as revealed by modelling and several experimental studies: in situ single-crystal X-ray diffraction, FTIR, and gas mixture breakthrough tests. NKMOF-1-M exhibit better low-pressure uptake than existing physisorbents and possesses the highest selectivities yet reported for C H /CO and C H /CH . The performance of NKMOF-1-M is not driven by the same mechanism as current benchmark physisorbents that rely on pore walls lined by inorganic anions.
从各种气体混合物中高度选择性地分离和/或纯化乙炔是一项重要且具有挑战性的任务，目前需要成本高昂且能耗大的化学吸附过程。两种超微孔金属有机骨架物理吸附剂NKMOF-1-M（M = Cu或Ni）在环境温度下对乙炔相对于几种气体具有高水解稳定性和基准选择性。NKMOF-1-M的性能归因于其通过建模和多项实验研究（原位单晶X射线衍射、傅里叶变换红外光谱和气体混合物突破测试）所揭示的对乙炔的特殊结合亲和力。NKMOF-1-M在低压吸附方面表现优于现有物理吸附剂，并且对C₂H₂/CO₂和C₂H₂/CH₄具有迄今报道的最高选择性。NKMOF-1-M的性能并非由与当前依赖无机阴离子内衬孔壁的基准物理吸附剂相同的机制驱动。
