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

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 becau...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2019, Vol.7 (14), p.8177-8183
Main Authors: Kang, Minjung, Kim, Jeong Eun, Kang, Dong Won, Hwa Young Lee, Moon, Dohyun, Hong, Chang Seop
Format: Article
Language:English
Subjects:
Adsorbents
Carbon dioxide
Carbon sequestration
Coal-fired power plants
Coating
Coatings
Electric power generation
Flue gas
Metal-organic frameworks
Metals
Moisture
Polydimethylsiloxane
Power plants
Regeneration
Silicone resins
Stability
Temperature effects
Temperature gradients
Water vapor
Work capacity
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Summary: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.
ISSN:2050-7488
2050-7496
DOI:10.1039/c8ta07965j