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Scalable Synthesis of Robust MOF for Challenging Ethylene Purification and Propylene Recovery with Record Productivity |
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| Authors: | Dr. Gang-Ding Wang Dr. Yong-Zhi Li Prof. Rajamani Krishna Prof. Wen-Yan Zhang Prof. Lei Hou Prof. Yao-Yu Wang Prof. Zhonghua Zhu |
| Affiliation: | 1. Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710069 P. R. China. These authors contributed equally to this work. Contribution: Data curation (equal), Investigation (lead), Writing - original draft (equal);2. Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710069 P. R. China. School of Materials and Physics, China University of Mining and Technology, Xuzhou, 221116 P. R. China. These authors contributed equally to this work. Contribution: Data curation (equal), Investigation (equal), Writing - original draft (equal);3. Van‘t Hoff Institute for Molecular Sciences University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands;4. Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710069 P. R. China. Contribution: Formal analysis (equal);5. Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710069 P. R. China.;6. Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi'an, 710069 P. R. China. Contribution: Resources (lead);7. School of Chemical Engineering, The University of Queensland, Brisbane, 4072 Australia Contribution: Formal analysis (equal) |
| Abstract: | Ethylene (C2H4) purification and propylene (C3H6) recovery are highly relevant in polymer synthesis, yet developing physisorbents for these industrial separation faces the challenges of merging easy scalability, economic feasibility, high moisture stability with great separation efficiency. Herein, we reported a robust and scalable MOF (MAC-4) for simultaneous recovery of C3H6 and C2H4. Through creating nonpolar pores decorated by accessible N/O sites, MAC-4 displays top-tier uptakes and selectivities for C2H6 and C3H6 over C2H4 at ambient conditions. Molecular modelling combined with infrared spectroscopy revealed that C2H6 and C3H6 molecules were trapped in the framework with stronger contacts relative to C2H4. Breakthrough experiments demonstrated exceptional separation performance for binary C2H6/C2H4 and C3H6/C2H4 as well as ternary C3H6/C2H6/C2H4 mixtures, simultaneously affording record productivities of 27.4 and 36.2 L kg−1 for high-purity C2H4 (≥99.9 %) and C3H6 (≥99.5 %). MAC-4 was facilely prepared at deckgram-scale under reflux condition within 3 hours, making it as a smart MOF to address challenging gas separations. |
| Keywords: | metal–organic framework scalable synthesis gas adsorption and separation ethylene purification propylene recovery |