The adsorption and simulatd separation of light hydrocarbons in isoreticular metal-organic frameworks based on dendritic ligands with different aliphatic side chains
The adsorption and simulatd separation of light hydrocarbons in isoreticular metal-organic frameworks based on dendritic ligands with different aliphatic side chains
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基于不同脂肪侧链树枝状配体的等网状金属有机骨架中轻烃的吸附与模拟分离
DOI：
10.1002/chem.201304962
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Guangshan Zhu
中科院分区：
文献类型：
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作者：
Jiangtao Jia;Lei Wang;Fuxing Sun;Xiaofei Jing;Zheng Bian;Lianxun Gao;Rajamani Krishna;Guangshan Zhu
通过将六节点树枝状配体连接到[Zn4O(CO2)6]簇合成了三种等网状金属有机框架JUC-100、JUC-103和JUC-106。相对于 JUC-100，JUC-103 和 JUC-106 在孔中分别具有额外的甲基和乙基。进行了三种 MOF 对 CH4、C2H4、C2H6 和 C3H8 的吸收测量。在 298 K、1 atm 时，JUC-103 具有相对较高的 CH4 吸收量，但 JUC-100 在 273 K、1 atm 时吸收效果最好。 JUC-100和JUC-103具有相似的C2H4吸收能力。此外，JUC-100对C2H6和C3H8的吸收能力最好。这些结果表明高表面积和适当的孔径是气体吸收的重要因素。此外，理想吸附溶液理论（IAST）分析表明，对于维持在298 K等温条件下的等摩尔四元CH4/C2H4/C2H6/C3H8气体混合物，所有三种MOF都具有良好的C3H8/CH4和C2H6/CH4选择性，并且JUC-106具有最佳的C2H6/CH4选择性。突破性的模拟表明，所有三种 MOF 都具有良好的分离 C2 碳氢化合物和 C3 碳氢化合物的能力。脉冲色谱模拟还表明，所有三种 MOF 都能够将 CH4/C2H4/C2H6/C3H8 混合物分离成 C1、C2 和 C3 烃的三种不同馏分。
Three isoreticular metal–organic frameworks, JUC‐100, JUC‐103 and JUC‐106, were synthesized by connecting six‐node dendritic ligands to a [Zn4O(CO2)6] cluster. JUC‐103 and JUC‐106 have additional methyl and ethyl groups, respectively, in the pores with respect to JUC‐100. The uptake measurements of the three MOFs for CH4, C2H4, C2H6and C3H8were carried out. At 298 K, 1 atm, JUC‐103 has relatively high CH4uptake, but JUC‐100 is the best at 273 K, 1 atm. JUC‐100 and JUC‐103 have similar C2H4absorption ability. In addition, JUC‐100 has the best absorption capacity for C2H6and C3H8. These results suggest that high surface area and appropriate pore size are important factors for gas uptake. Furthermore, ideal adsorbed solution theory (IAST) analyses show that all three MOFs have good C3H8/CH4and C2H6/CH4selectivities for an equimolar quaternary CH4/C2H4/C2H6/C3H8gas mixture maintained at isothermal conditions at 298 K, and JUC‐106 has the best C2H6/CH4selectivity. The breakthrough simulations indicate that all three MOFs have good capability for separating C2 hydrocarbons from C3 hydrocarbons. The pulse chromatographic simulations also indicate that all three MOFs are able to separate CH4/C2H4/C2H6/C3H8mixture into three different fractions of C1, C2 and C3 hydrocarbons.