author = {Chen, Banglin and Peng, Yun-Lei and He, Chaohui and Pham, Tony and Wang, Ting and Li, Pengfei and Krishna, Rajamani and Forrest, Katherine and Hogan, Adam and Suepaul, Shanelle and Space, Brian and Fang, Ming and Chen, Yao and Zaworotko, Michael and Li, Jinping and Cheng, Peng and Li, Libo and Zhang, Zhenjie},
title = {Robust Microporous Metal-Organic Frameworks for Highly Efficient and Simultaneous Removal of Propyne and Propadiene from Propylene},
journal = {Angewandte Chemie International Edition},
volume = {58},
number = {30},
pages = {10209-10214},
keywords = {metal-organic frameworks, ternary gas separation, propylene purification, molecular recognition},
doi = {10.1002/anie.201904312},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.201904312},
eprint = {https://onlinelibrary.wiley.com/doi/pdf/10.1002/anie.201904312},
abstract = {Simultaneous removal of trace amount of propyne and propadiene from propylene is an important but challenging industrial process. In this study, we reported a class of microporous metal-organic frameworks (NKMOF-1-M) with exceptional water stability and remarkably high uptakes for both propyne and propadiene at low pressures. Attributed to the strong bind affinity to propyne and propadiene over propylene, NKMOF-1-M created new benchmark selectivities for ternary propyne/propadiene/propylene (0.5/0.5/99.0) mixture, and set as a unique MOF platform to achieve both the highest selectivity and productivity of polymer-grade propylene (99.996\%) at ambient temperature, verified by both simulated and experimental breakthrough results. Moreover, we demonstrated a rare example to visualize propyne and propadiene molecules in the single-crystal structure of NKMOF-1-M through a convenient approach under ambient condition, which helped to precisely understand the binding sites and affinity of propyne and propadiene. These results provide important guidance on using ultramicroporous MOFs as physisorbent materials to resolve industrial challenges related to ternary propyne/propadiene/propylene mixture separation.},