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

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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.

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

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Publication details

The article was received on 16 Aug 2018, accepted on 25 Nov 2018 and first published on 26 Nov 2018


Article type: Paper
DOI: 10.1039/C8TA07965J
Citation: J. Mater. Chem. A, 2019, Advance Article
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    A diamine-grafted metal–organic framework with outstanding CO2 capture properties and a facile coating approach for imparting exceptional moisture stability

    M. Kang, J. E. Kim, D. W. Kang, H. Y. Lee, D. Moon and C. S. Hong, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C8TA07965J

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