Efficient propyne/propadiene separation by microporous crystalline physiadsorbents

Yun-Lei Peng, Ting Wang, Chaonan Jin, Cheng-Hua Deng, Yanming Zhao, Wansheng Liu, Katherine A. Forrest, Rajamani Krishna, Yao Chen, Tony Pham, Brian Space, Peng Cheng, Michael J. Zaworotko and Zhenjie Zhang ()
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Yun-Lei Peng: Nankai University
Ting Wang: Nankai University
Chaonan Jin: Nankai University
Cheng-Hua Deng: University of Limerick
Yanming Zhao: Zhengzhou University
Wansheng Liu: Nankai University
Katherine A. Forrest: University of South Florida; 4202 East Fowler Avenue, CHE205
Rajamani Krishna: University of Amsterdam; Science Park 904
Yao Chen: Nankai University
Tony Pham: University of South Florida; 4202 East Fowler Avenue, CHE205
Brian Space: University of South Florida; 4202 East Fowler Avenue, CHE205
Peng Cheng: Nankai University
Michael J. Zaworotko: University of Limerick
Zhenjie Zhang: Nankai University

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: Abstract Selective separation of propyne/propadiene mixture to obtain pure propadiene (allene), an essential feedstock for organic synthesis, remains an unsolved challenge in the petrochemical industry, thanks mainly to their similar physicochemical properties. We herein introduce a convenient and energy-efficient physisorptive approach to achieve propyne/propadiene separation using microporous metal-organic frameworks (MOFs). Specifically, HKUST-1, one of the most widely studied high surface area MOFs that is available commercially, is found to exhibit benchmark performance (propadiene production up to 69.6 cm3/g, purity > 99.5%) as verified by dynamic breakthrough experiments. Experimental and modeling studies provide insight into the performance of HKUST-1 and indicate that it can be attributed to a synergy between thermodynamics and kinetics that arises from abundant open metal sites and cage-based molecular traps in HKUST-1.

Date: 2021
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DOI: 10.1038/s41467-021-25980-y

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