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Mesoporous silica as a tunable support for dual-function Ba–Ru catalysts: impact on CO2 adsorption and methanation performance.

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Title: Mesoporous silica as a tunable support for dual-function Ba–Ru catalysts: impact on CO2 adsorption and methanation performance.
Authors: Molina-Ramirez, S.1 (AUTHOR), Nava, G.2 (AUTHOR), Finocchio, E.1,3 (AUTHOR) elisabetta.finocchio@unige.it, Lietti, L.2 (AUTHOR), Viganò, L.1 (AUTHOR), Di Virgilio, M.1 (AUTHOR), Di Credico, B.4 (AUTHOR), Scotti, R.4 (AUTHOR), Cristiani, C.1 (AUTHOR), Castoldi, L.1,2 (AUTHOR) lidia.castoldi@polimi.it
Source: Microporous & Mesoporous Materials. Apr2026, Vol. 405, pN.PAG-N.PAG. 1p.
Subjects: Mesoporous silica, Carbon dioxide adsorption, Catalytic activity, Ruthenium catalysts, Carbon sequestration, Barium carbonate
Abstract: The integration of CO 2 capture and catalytic methanation into a single material platform presents an efficient route toward carbon-neutral fuel production. In this work, we investigate silica-supported dual-function materials (DFMs) comprising Ba as the CO 2 storage component and Ru as the methanation catalyst. A series of Ba-Ru/SiO 2 materials were synthesized via incipient wetness impregnation, with varying Ba loadings (16-32 wt%) and promoter deposition sequences. Structural, morphological, and surface analyses (BET, XRD, FT-IR) revealed the formation and thermal evolution of distinct carbonate species as a function of Ba content and preparation method. CO 2 -TPD and H 2 -TPSR experiments demonstrated that the impregnation order influences the nature, strength, and regenerability of the adsorbed carbonate species. Increasing Ba loading enhances CO 2 uptake and promotes the formation of thermally stable bridging carbonates, while Ru positioning affects methanation activity and carbonate reactivity. Compared to alumina-based DFMs, silica-supported systems exhibit distinct carbonate populations and lower-temperature regeneration behavior due to the non-interacting nature of the support. These findings offer new insights into the design of mesoporous DFMs with tunable CO 2 sorption and conversion performance, highlighting the properties of silica as support for integrated carbon capture and utilization. [Display omitted] • Mesoporous silica as support for DFMs to integrate CO 2 capture and methanation. • Ba loading boosts CO 2 storage capacity and carbonate stability. • Ru order impregnation affects methanation activity and carbonate reactivity. • Ru-16Ba/SiO 2 leads to the formation of regenerable carbonates at lower temperatures. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:The integration of CO 2 capture and catalytic methanation into a single material platform presents an efficient route toward carbon-neutral fuel production. In this work, we investigate silica-supported dual-function materials (DFMs) comprising Ba as the CO 2 storage component and Ru as the methanation catalyst. A series of Ba-Ru/SiO 2 materials were synthesized via incipient wetness impregnation, with varying Ba loadings (16-32 wt%) and promoter deposition sequences. Structural, morphological, and surface analyses (BET, XRD, FT-IR) revealed the formation and thermal evolution of distinct carbonate species as a function of Ba content and preparation method. CO 2 -TPD and H 2 -TPSR experiments demonstrated that the impregnation order influences the nature, strength, and regenerability of the adsorbed carbonate species. Increasing Ba loading enhances CO 2 uptake and promotes the formation of thermally stable bridging carbonates, while Ru positioning affects methanation activity and carbonate reactivity. Compared to alumina-based DFMs, silica-supported systems exhibit distinct carbonate populations and lower-temperature regeneration behavior due to the non-interacting nature of the support. These findings offer new insights into the design of mesoporous DFMs with tunable CO 2 sorption and conversion performance, highlighting the properties of silica as support for integrated carbon capture and utilization. [Display omitted] • Mesoporous silica as support for DFMs to integrate CO 2 capture and methanation. • Ba loading boosts CO 2 storage capacity and carbonate stability. • Ru order impregnation affects methanation activity and carbonate reactivity. • Ru-16Ba/SiO 2 leads to the formation of regenerable carbonates at lower temperatures. [ABSTRACT FROM AUTHOR]
ISSN:13871811
DOI:10.1016/j.micromeso.2026.114080