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Efficient propyne/propadiene separation by microporous crystalline physiadsorbents

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-eff...

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Detalles Bibliográficos
Autores principales: Peng, Yun-Lei, Wang, Ting, Jin, Chaonan, Deng, Cheng-Hua, Zhao, Yanming, Liu, Wansheng, Forrest, Katherine A., Krishna, Rajamani, Chen, Yao, Pham, Tony, Space, Brian, Cheng, Peng, Zaworotko, Michael J., Zhang, Zhenjie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8486746/
https://www.ncbi.nlm.nih.gov/pubmed/34599179
http://dx.doi.org/10.1038/s41467-021-25980-y
Descripción
Sumario: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 cm(3)/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.