Chen Fuqiang, Huang Xinglei, Guo Kaiqing, Yang Liu, Sun Haoran, Xia Wei, Zhang Zhiguo, Yang Qiwei, Yang Yiwen, Zhao Dan, Ren Qilong, Bao Zongbi
Key Laboratory of Biomass Chemical Engineering of ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, P. R. China.
Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585, Singapore.
ACS Appl Mater Interfaces. 2022 Jul 6;14(26):30443-30453. doi: 10.1021/acsami.2c09189. Epub 2022 Jun 24.
The development of adsorption-based separation processes alternative to the energy-intensive cryogenic distillation for a mixture of propylene and propane remains essential but challenging in gas industries. Molecular sieving separation of CH/CH on stable carbon adsorbents appeals to be promising, while it is quite challenging to realize due to the random distributions and arrangements of the internal pores in common carbons. Herein, a series of polysaccharide-based CD-MOF-derived ultramicroporous carbon adsorbents with their pore size tuned at a subangstrom level were prepared. Molecular sieving separation of CH/CH was realized on the optimal C-CDMOF-2-700 owing to the delicate structure with an appropriate pore size (5.0 Å). Besides, C-CDMOF-2-700 exhibited a high CH uptake of 1.97 mmol g under ambient conditions. An ultrahigh uptake ratio of CH/CH at 1.0 kPa (403) was also achieved, outperforming all reported adsorbents. Kinetic adsorption tests and breakthrough experiments further demonstrate this well-designed carbon adsorbent to be promising in industrial CH/CH separation.
开发替代丙烯和丙烷混合物能量密集型低温精馏的基于吸附的分离工艺在气体工业中仍然至关重要但具有挑战性。在稳定的碳吸附剂上对CH/CH进行分子筛分离似乎很有前景，但由于普通碳中内部孔隙的随机分布和排列，实现起来颇具挑战。在此，制备了一系列基于多糖的CD-MOF衍生的超微孔碳吸附剂，其孔径在亚埃级别进行了调谐。由于具有合适孔径（5.0 Å）的精细结构，在最佳的C-CDMOF-2-700上实现了CH/CH的分子筛分离。此外，C-CDMOF-2-700在环境条件下表现出1.97 mmol g的高CH吸附量。在1.
