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Title: Aging studies of Dual functional materials for CO2 direct air capture with in situ methanation under simulated ambient conditions: Ru thrifting for cost reduction

Journal Article · · Chemical Engineering Journal

Dual function materials (DFMs) comprised of 0.25 %Ru, 6.1 %Na2O/γ-Al2O3//monolith were evaluated for about 250 hours time-on-stream (TOS) at various simulated ambient climate capture conditions followed by temperature swing methanation to 280 °C. Herein this paper focuses on the impact of thrifting Ru to low levels and the impact on performance. Results showed both stable CO2 capture capacity and CH4 production with 0.25 % Ru DFM deposited on a ceramic monolith. The CO2 conversion to CH4 production was decreased slightly by the Ru decrease from 1 % to 0.25 %. The capture capacity decreased since a lower Ru content reduces the complete decomposition of the Na2CO3 precursor producing fewer active adsorption sites (“Na2O”). The deployment of a low Ru DFM monolith would significantly decrease the overall capital cost and give more potential for a large-scale direct air capture and methanation (DACM) application.

Research Organization:
Susteon, Inc., Cary, NC (United States); Columbia Univ., New York, NY (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0020795
OSTI ID:
2339509
Alternate ID(s):
OSTI ID: 2370000
Journal Information:
Chemical Engineering Journal, Journal Name: Chemical Engineering Journal Vol. 479; ISSN 1385-8947
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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