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Scalable Green Synthesis of Robust Ultra-Microporous Hofmann Clathrate Material with Record C3H6 Storage Density for Efficient C3H6/C3H8 Separation |
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| Authors: | Di Liu Jiyan Pei Prof Xu Zhang Xiao-Wen Gu Prof Hui-Min Wen Prof Banglin Chen Prof Guodong Qian Prof Bin Li |
| Institution: | 1. State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China
These authors contributed equally to this work.;2. School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian, 223300 China These authors contributed equally to this work.;3. State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China;4. College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014 China;5. Fujian Provincial Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007 China |
| Abstract: | Developing porous materials for C3H6/C3H8 separation faces the challenge of merging excellent separation performance with high stability and easy scalability of synthesis. Herein, we report a robust Hofmann clathrate material (ZJU-75a), featuring high-density strong binding sites to achieve all the above requirements. ZJU-75a adsorbs large amount of C3H6 with a record high storage density of 0.818 g mL−1, and concurrently shows high C3H6/C3H8 selectivity (54.2) at 296 K and 1 bar. Single-crystal structure analysis unveil that the high-density binding sites in ZJU-75a not only provide much stronger interactions with C3H6 but also enable the dense packing of C3H6. Breakthrough experiments on gas mixtures afford both high separation factor of 14.7 and large C3H6 uptake (2.79 mmol g−1). This material is highly stable and can be easily produced at kilogram-scale using a green synthesis method, making it as a benchmark material to address major challenges for industrial C3H6/C3H8 separation. |
| Keywords: | Gas Separation Green Synthesis High-Density Binding Sites Porous Materials Propylene |