A diamine-grafted metal-organic framework with outstanding CO2 capture properties and a facile coating approach for imparting exceptional moisture stability

Minjung Kang, Jeong Eun Kim, Dong Won Kang, Hwa Young Lee, Dohyun Moon, Chang Seop Hong

    Research output: Contribution to journalArticlepeer-review

    53 Citations (Scopus)

    Abstract

    Prospective solid adsorbents for CO2 capture require low total regeneration energy that can be achieved by combining high working capacity, a low desorption temperature, and a narrow temperature difference (ΔT) between capture and regeneration. These materials should be critically water-stable because flue gas from coal-fired power plants contains water vapor. Herein, we present the development of a diamine-appended metal-organic framework (MOF) adsorbent that showed unprecedented performance with a record narrow ΔT (30 °C), a quite low regeneration temperature (≤100 °C), and a significant working capacity (14 wt%) over 600 cycles. Remarkably, coating of the MOF with polydimethylsiloxane (PDMS) imparted enhanced moisture stability and superior CO2 adsorption capacity. Such a simple coating approach can be used to design humidity-stable MOF adsorbents, with exceptional performance, applicable in real-world CO2 capture processes.

    Original languageEnglish
    Pages (from-to)8177-8183
    Number of pages7
    JournalJournal of Materials Chemistry A
    Volume7
    Issue number14
    DOIs
    Publication statusPublished - 2019

    Bibliographical note

    Publisher Copyright:
    © 2019 The Royal Society of Chemistry.

    ASJC Scopus subject areas

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

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