Selective Adsorption and Separation of ortho-Substituted Alkylaromatics with the Microporous Aluminum Terephthalate MIL-53
Selective Adsorption and Separation of ortho-Substituted Alkylaromatics with the Microporous Aluminum Terephthalate MIL-53
复制标题
DOI：
10.1021/ja802761z
复制
发表时间：
2008-10-29
影响因子：
15
通讯作者：
De Vos, Dirk E.
中科院分区：
文献类型：
--
作者：
Alaerts, Luc;Maes, Michael;De Vos, Dirk E.
金属-有机框架MIL-53（Al）进行了测试，选择性吸附和分离二甲苯和二甲苯，乙基甲苯，和异丙基甲苯使用批，脉冲色谱，和突破实验。在测试的所有条件下，MIL-53在每一组烷基芳族化合物中对邻位异构体具有最大的亲和力。邻位化合物与其他异构体的分离可以使用填充有MIL-53微晶的柱来实现。如Rietveld精炼所证明的，二甲苯与MIL-53的孔壁的特异性相互作用决定了选择性。与结构相似的金属有机骨架MIL-47相比，MIL-53的烷基芳族化合物之间的选择性不同。乙基甲苯和伞花烃异构体的分离在MIL-53上比在MIL-47上更有效; MIL-53的孔似乎是比MIL-47的孔更适合容纳较大的乙基甲苯和伞花烃异构体的环境。
The metal-organic framework MIL-53(Al) was tested for selective adsorption and separation of xylenes and ethylbenzene, ethyltoluenes, and cymenes using batch, pulse chromatographic, and breakthrough experiments. In all conditions tested, MIL-53 has the largest affinity for the ortho-isomer among each group of alkylaromatic compounds. Separations of the ortho-compounds from the other isomers can be realized using a column packed with MIL-53 crystallites. As evidenced by Rietveld refinements, specific interactions of the xylenes with the pore walls of MIL-53 determine selectivity. In comparison with the structurally similar metal-organic framework MIL-47, the selectivities among alkylaromatics found for MIL-53 are different. Separation of ethyltoluene and cymene isomers is more effective on MIL-53 than on MIL-47; the pores of MIL-53 seem to be a more suitable environment for hosting the larger ethyltoluene and cymene isomers than those of MIL-47.