One-step removal of alkynes and propadiene from cracking gases using a multi-functional molecular separator

Qingju Wang, Jianbo Hu, Lifeng Yang, Zhaoqiang Zhang, Tian Ke, Xili Cui () and Huabin Xing ()
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Qingju Wang: Zhejiang University
Jianbo Hu: Zhejiang University
Lifeng Yang: Zhejiang University
Zhaoqiang Zhang: Zhejiang University
Tian Ke: Zhejiang University
Xili Cui: Zhejiang University
Huabin Xing: Zhejiang University

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract 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.

Date: 2022
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DOI: 10.1038/s41467-022-30408-2

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