Wang Qingju, Hu Jianbo, Yang Lifeng, Zhang Zhaoqiang, Ke Tian, Cui Xili, Xing Huabin
Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China.
ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou, 311215, China.
Nat Commun. 2022 May 26;13(1):2955. doi: 10.1038/s41467-022-30408-2.
Refineries generally employ multiple energy-intensive distillation/adsorption columns to separate and purify complicated chemical mixtures. Materials such as multi-functional molecular separators integrating various modules capable of separating molecules according to their shape and chemical properties simultaneously may represent an alternative. Herein, we address this challenge in the context of one-step removal of alkynes and propadiene from cracking gases (up to 10 components) using a multi-functional and responsive material ZU-33 through a guest/temperature dual-response regulation strategy. The responsive and guest-adaptive properties of ZU-33 provide the optimized binding energy for alkynes and propadiene, and avoid the competitive adsorption of olefins and paraffins, which is verified by breakthrough tests, single-crystal X-ray diffraction experiments, and simulation studies. The responsive properties to different stimuli endow materials with multiple regulation methods and broaden the boundaries of the applicability of porous materials to challenging separations.
炼油厂通常采用多个能源密集型蒸馏/吸附塔来分离和提纯复杂的化学混合物。诸如集成了各种能够根据分子形状和化学性质同时分离分子的模块的多功能分子分离器等材料可能是一种替代方案。在此，我们在使用多功能响应性材料ZU-33通过客体/温度双响应调节策略从裂解气（多达10种成分）中一步去除炔烃和丙二烯的背景下应对这一挑战。ZU-33的响应性和客体适应性特性为炔烃和丙二烯提供了优化的结合能，并避免了烯烃和石蜡的竞争性吸附，这通过穿透试验、单晶X射线衍射实验和模拟研究得到了验证。对不同刺激的响应特性赋予材料多种调节方法，并拓宽了多孔材料在具有挑战性的分离应用中的适用范围。
