| _version_ | 1867008317923000320 |
|---|---|
| author | Nagasuresh Enjamuri So Nishikawa Masahiko Nishijima Shohei Tada Ryuji Kikuchi |
| author_facet | Nagasuresh Enjamuri So Nishikawa Masahiko Nishijima Shohei Tada Ryuji Kikuchi Nagasuresh Enjamuri So Nishikawa Masahiko Nishijima Shohei Tada Ryuji Kikuchi |
| collection | Wiley Open Access |
| contents | Highly active and stable Ru‐promoted Ni/CeO2 catalysts for CO2 methanation reaction Nagasuresh Enjamuri So Nishikawa Masahiko Nishijima Shohei Tada Ryuji Kikuchi The Canadian Journal of Chemical Engineering AbstractBiogas is not only a promising renewable source of energy that can be integrated into existing infrastructures, but biogas could also be a CO2 source for green methane synthesis by hydrogenation with renewable energy‐derived hydrogen. Since biogas is a mixture of CO2 and CH4, we targeted to accomplish direct methanation of CO2 in CH4‐rich gases that are supposed to be a simulated biogas without any processes for CH4 and CO2 separation in biogas. This direct CO2 methanation in biogas can be a more sustainable and environmentally friendly approach. Methane production from biogas‐derived CO2 by conventional methods has some difficulties, including (1) the vast energy cost for separation process of CO2 and CH4 and (2) the slow rate of the reaction in biochemical CO2 methanation. In this paper, we developed active and durable catalysts in direct methanation of CO2 contained in biogas. The focus was on the effect of coexisting CH4 and steam in biogas on CO2 methanation activity and durability of CeO2 supported Ni catalysts. Among all prepared catalysts, a 1 wt.% Ru‐10 wt.% Ni/CeO2 catalyst exhibited 90% CO2 conversion and 100% CH4 selectivity at 275°C reaction temperature. Adding steam to the standard reaction gas mixture (CO2/H2/N2 = 1/4/5) did not impact CO2 conversion in the temperature range investigated, whereas adding CH4 to the standard reaction gas mixture had only a minute decrease (i.e., 86.9% CO2 conversion and 100% CH4 selectivity at 275°C temperature). Furthermore, the 1 wt.% Ru‐10 wt.% Ni/CeO2 catalyst demonstrated remarkable stability in the CO2 methanation reaction. 10.1002/cjce.25708 http://onlinelibrary.wiley.com/termsAndConditions#vor |
| doi_str_mv | 10.1002/cjce.25708 |
| format | Artículo Open Access |
| id | wiley_oa_10_1002_cjce_25708 |
| institution | Wiley Open Access |
| license_str_mv | http://onlinelibrary.wiley.com/termsAndConditions#vor |
| publishDate | 2025 |
| publisher | Wiley |
| record_format | wiley_oa |
| spellingShingle | Highly active and stable Ru‐promoted Ni/CeO2 catalysts for CO2 methanation reaction Nagasuresh Enjamuri So Nishikawa Masahiko Nishijima Shohei Tada Ryuji Kikuchi The Canadian Journal of Chemical Engineering Highly active and stable Ru‐promoted Ni/CeO2 catalysts for CO2 methanation reaction Nagasuresh Enjamuri So Nishikawa Masahiko Nishijima Shohei Tada Ryuji Kikuchi The Canadian Journal of Chemical Engineering AbstractBiogas is not only a promising renewable source of energy that can be integrated into existing infrastructures, but biogas could also be a CO2 source for green methane synthesis by hydrogenation with renewable energy‐derived hydrogen. Since biogas is a mixture of CO2 and CH4, we targeted to accomplish direct methanation of CO2 in CH4‐rich gases that are supposed to be a simulated biogas without any processes for CH4 and CO2 separation in biogas. This direct CO2 methanation in biogas can be a more sustainable and environmentally friendly approach. Methane production from biogas‐derived CO2 by conventional methods has some difficulties, including (1) the vast energy cost for separation process of CO2 and CH4 and (2) the slow rate of the reaction in biochemical CO2 methanation. In this paper, we developed active and durable catalysts in direct methanation of CO2 contained in biogas. The focus was on the effect of coexisting CH4 and steam in biogas on CO2 methanation activity and durability of CeO2 supported Ni catalysts. Among all prepared catalysts, a 1 wt.% Ru‐10 wt.% Ni/CeO2 catalyst exhibited 90% CO2 conversion and 100% CH4 selectivity at 275°C reaction temperature. Adding steam to the standard reaction gas mixture (CO2/H2/N2 = 1/4/5) did not impact CO2 conversion in the temperature range investigated, whereas adding CH4 to the standard reaction gas mixture had only a minute decrease (i.e., 86.9% CO2 conversion and 100% CH4 selectivity at 275°C temperature). Furthermore, the 1 wt.% Ru‐10 wt.% Ni/CeO2 catalyst demonstrated remarkable stability in the CO2 methanation reaction. 10.1002/cjce.25708 http://onlinelibrary.wiley.com/termsAndConditions#vor |
| title | Highly active and stable Ru‐promoted Ni/CeO2 catalysts for CO2 methanation reaction |
| topic | The Canadian Journal of Chemical Engineering |
| url | https://onlinelibrary.wiley.com/doi/10.1002/cjce.25708 |