期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 310, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2022.121294
关键词
CCU; CO2 methanation; DFM stability; Reduced Ru loadings; Simulated power plant effluents
资金
- Cohn Memorial Fellowship
- Anglo American, UK
This study investigates the stability of different Ru-based dual function materials during CO2 capture and catalytic methanation. It is found that the Ru component of DFM deactivates under high levels of O-2 and steam exposure, resulting in lower methanating ability.
This work addresses the stability of different Ru-based dual function materials (DFM, x% Ru, 6.1% Na2O /Al2O3) during cycles of CO2 capture from simulated power plant effluent (320 ?; 7.5% CO2, 15% steam, 4.5% O-2, balance N-2 (v/v)) and subsequent catalytic methanation. Aging studies are carried out to simulate natural gas combustion flue gas on DFM granules, tablets, and ring tablets prepared by sequentially impregnating Ru and Na2O. Stability increases with Ru loading; however, 0.5% Ru DFMs demonstrate a small but steady loss of CH4 produced per cycle consistent with deactivation of the Ru component likely due to exposure to high levels of O-2 and steam in the flue gas. CO chemisorption, in-situ FT-IR, and transient microreactor studies all verify that there is loss in Ru active surface area, possibly due to sintering, which consequently results in lower methanating ability.
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