A novel cage-based metal-organic framework for efficient separation of light hydrocarbons

被引:5
作者
Riaz, Muhammad [1 ]
Acharya, Dinesh [1 ]
Chu, Hongxu [1 ]
Sun, Di [1 ]
Azam, Mohammad [2 ]
Cui, Ping [1 ]
机构
[1] Shandong Univ, Sch Chem & Chem Engn, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
[2] King Saud Univ, Coll Sci, Dept Chem, POB 2455, Riyadh 11451, Saudi Arabia
基金
中国国家自然科学基金;
关键词
STORAGE; ADSORPTION;
D O I
10.1039/d4ta05234j
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The development of effective physical adsorbents for the separation of light hydrocarbon gas mixtures is a challenging and prime step in the petrochemical industry. In this work, we designed and synthesized a novel cage-based metal-organic framework, SDU-CP-8, featuring an ellipsoid-shaped cage and a 3-nodal (4,6,8)-connected network. SDU-CP-8 displays remarkable adsorption capacities for C3H8 (148.9 cm3 g-1) and C2H6 (126.3 cm3 g-1), significantly higher than that for CH4 (16.6 cm3 g-1) at 273 K and 100 kPa, while the gas uptake value for C2H2 (116.1 cm3 g-1) is higher than that for CO2 (61.8 cm3 g-1) at 273 K and 100 kPa. Moreover, breakthrough experiments demonstrate that SDU-CP-8 can effectively separate C3H8/C2H6/CH4 and C2H2/CO2 gas mixtures. Theoretical calculations show that multiple interactions (C-H & ctdot;O and C-H & ctdot;pi) within the cage of SDU-CP-8 significantly contribute to the high gas uptake by the framework. These results show that SDU-CP-8 is a promising adsorbent for both CH4 and C2H2 purification. A novel 3D MOF, SDU-CP-8, features an ellipsoid-shaped cage and a 3-nodal, (4,6,8)-connected network. It demonstrates excellent adsorption and separation capabilities for C3H8/C2H6/CH4 and C2H2/CO2 gas mixtures.
引用
收藏
页码:28541 / 28547
页数:7
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