A robust ethane-selective hypercrosslinked porous organic adsorbent with high ethane capacity

Hyein Park, Minjung Kang, Dong Won Kang, Chang Seop Hong

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

While preferential adsorption of ethane (C2H6) over ethylene (C2H4) is more advantageous in industrial separation technology, most porous materials such as metal-organic frameworks, covalent-organic frameworks, and hydrogen-bonded organic frameworks provide C2H4-selective performance, and they suffer from poor stability and large-scale synthesis problems required for practical applications. Herein, we report the synthesis and C2 gas separation properties of seven robust hypercrosslinked polymers (HCPs; HCP_TPB, HCP_TMPB, HCP_BCMBP, HCP_p-DCX, HCP_m-DCX, HCP_o-DCX, and HCP_CMBA) prepared from inexpensive starting monomers through the facile Friedel-Crafts reaction. Notably, HCP_TPB exhibited the highest C2H6 capture capacity among C2H6-selective metal-free adsorbents. The preferential C2H6 adsorption is associated with enhanced C-H⋯π interactions in the intrinsically nonpolar environments created by aromatic rings. In addition, a linear relationship between ethane uptake and surface area in porous organic frameworks was established for the first time. Breakthrough experiments demonstrated the selective separation of C2H6 from C2H6/C2H4 mixtures and the recyclability of HCP_TPB and HCP_TMPB. This work provides a design basis for the development of scalable, robust C2H6-selective adsorbents by tuning the nonpolar pore environment.

Original languageEnglish
Pages (from-to)3579-3584
Number of pages6
JournalJournal of Materials Chemistry A
Volume10
Issue number7
DOIs
Publication statusPublished - 2022 Feb 21

Bibliographical note

Funding Information:
This research has been performed as a cooperation project of “Basic project (referring to projects performed with the budget directly contributed by the Government to achieve the purposes of establishment of Government-funded research Institutes)” and as a project no. SI2112-20 (Energy-saving process and technology of chemical production for response to climate change) supported by the Korea Research Institute of Chemical Technology (KRICT). This work was also supported by the National Research Foundation of Korea (NRF-2021M3I3A1084573) and the Priority Research Centers Program (NRF-2019R1A6A1A11044070).

Publisher Copyright:
© 2022 The Royal Society of Chemistry.

ASJC Scopus subject areas

  • General Chemistry
  • Renewable Energy, Sustainability and the Environment
  • General Materials Science

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