Ultramicroporous material based parallel and extended paraffin nano-trap for benchmark olefin purification

Peixin Zhang, Lifeng Yang, Xing Liu, Jun Wang, Xian Suo, Liyuan Chen, Xili Cui and Huabin Xing ()
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Peixin Zhang: Zhejiang University
Lifeng Yang: Zhejiang University
Xing Liu: Nanchang University
Jun Wang: Nanchang University
Xian Suo: ZJU-Hangzhou Global Scientific and Technological Innovation Center
Liyuan Chen: Zhejiang University
Xili Cui: Zhejiang University
Huabin Xing: Zhejiang University

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

Abstract: Abstract Selective paraffin capture from olefin/paraffin mixtures could afford high-purity olefins directly, but suffers from the issues of low separation selectivity and olefin productivity. Herein, we report an ultramicroporous material (PCP-IPA) with parallel-aligned linearly extending isophthalic acid units along the one-dimensional channel, realizing the efficient production of ultra-high purity C2H4 and C3H6 (99.99%). The periodically expanded and parallel-aligned aromatic-based units served as a paraffin nano-trap to contact with the exposed hydrogen atoms of both C2H6 and C3H8, as demonstrated by the simulation studies. PCP-IPA exhibits record separation selectivity of 2.48 and separation potential of 1.20 mol/L for C3H8/C3H6 (50/50) mixture, meanwhile the excellent C2H6/C2H4 mixture separation performance. Ultra-high purity C3H6 (99.99%) and C2H4 (99.99%) can be directly obtained through fixed-bed column from C3H8/C3H6 and C2H6/C2H4 mixtures, respectively. The record C3H6 productivity is up to 15.23 L/kg from the equimolar of C3H8/C3H6, which is 3.85 times of the previous benchmark material, demonstrating its great potential for those important industrial separations.

Date: 2022
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DOI: 10.1038/s41467-022-32677-3

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