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Tailor‐Made Microporous Metal–Organic Frameworks for the Full Separation of Propane from Propylene Through Selective Size Exclusion
Advanced Materials ( IF 27.4 ) Pub Date : 2018-10-15 , DOI: 10.1002/adma.201805088
Hao Wang 1, 2 , Xinglong Dong 3 , Valentina Colombo 4 , Qining Wang 1 , Yanyao Liu 1 , Wei Liu 2 , Xin-Long Wang 5 , Xiao-Ying Huang 6 , Davide M. Proserpio 4, 7 , Angelo Sironi 4 , Yu Han 3 , Jing Li 1, 2
Affiliation  

Adsorptive separation of olefin/paraffin mixtures by porous solids can greatly reduce the energy consumption associated with the currently employed cryogenic distillation technique. Here, the complete separation of propane and propylene by a designer microporous metal–organic framework material is reported. The compound, Y6(OH)8(abtc)3(H2O)6(DMA)2 (Y‐abtc, abtc = 3,3′,5,5′‐azobenzene‐tetracarboxylates; DMA = dimethylammonium), is rationally designed through topology‐guided replacement of inorganic building units. Y‐abtc is both thermally and hydrothermally robust, and possesses optimal pore window size for propane/propylene separation. It adsorbs propylene with fast kinetics under ambient temperature and pressure, but fully excludes propane, as a result of selective size exclusion. Multicomponent column breakthrough experiments confirm that polymer‐grade propylene (99.5%) can be obtained by this process, demonstrating its true potential as an alternative sorbent for efficient separation of propane/propylene mixtures.

中文翻译:

量身定制的微孔金属有机骨架,可通过选择性尺寸排阻将丙烷与丙烯完全分离

多孔固体对烯烃/石蜡混合物的吸附分离可大大降低与当前采用的低温蒸馏技术相关的能耗。在这里,据报道,使用一种设计者的微孔金属-有机骨架材料将丙烷和丙烯完全分离了。化合物Y 6(OH)8(abtc)3(H 2 O)6(DMA)2(Y-abtc,abtc = 3,3',5,5'-偶氮苯-四羧酸盐; DMA =二甲基铵),是通过拓扑结构指导的无机建筑单元替换合理设计的。Y-abtc具有热稳定性和水热稳定性,并具有用于丙烷/丙烯分离的最佳孔窗口尺寸。它在环境温度和压力下以快速动力学吸附丙烯,但由于选择性地排除了尺寸,因此完全排除了丙烷。多组分色谱柱突破性实验证实,该方法可制得聚合物级丙烯(99.5%),证明了其作为有效分离丙烷/丙烯混合物的替代吸附剂的真正潜力。
更新日期:2018-10-15
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