A diamine-grafted metal-organic framework with outstanding CO 2 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 journalArticle

3 Citations (Scopus)

Abstract

Prospective solid adsorbents for CO 2 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 CO 2 adsorption capacity. Such a simple coating approach can be used to design humidity-stable MOF adsorbents, with exceptional performance, applicable in real-world CO 2 capture processes.

Original languageEnglish
Pages (from-to)8177-8183
Number of pages7
JournalJournal of Materials Chemistry A
Volume7
Issue number14
DOIs
Publication statusPublished - 2019 Jan 1

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ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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