CO2 capture from air and its conversion to CH4 using dual functional materials supported on high surface area graphite
Several cycles of CO2 capture from synthetic air containing 400 ppm of CO2 and subsequent conversion to CH4 have been performed using dual functional materials consisting of 4 wt% Ru and 10 wt% Ba or Cs supported on a high surface area graphite. The effect of the presence of humidity and the regener...
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| Language: | English |
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Elsevier
2025-03-01
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| Series: | Journal of CO2 Utilization |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2212982025000381 |
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| author | Jorge Moral-Pombo Enrique García-Bordejé Yuefeng Liu Antonio Guerrero-Ruiz Inmaculada Rodríguez-Ramos |
| author_facet | Jorge Moral-Pombo Enrique García-Bordejé Yuefeng Liu Antonio Guerrero-Ruiz Inmaculada Rodríguez-Ramos |
| author_sort | Jorge Moral-Pombo |
| collection | DOAJ |
| description | Several cycles of CO2 capture from synthetic air containing 400 ppm of CO2 and subsequent conversion to CH4 have been performed using dual functional materials consisting of 4 wt% Ru and 10 wt% Ba or Cs supported on a high surface area graphite. The effect of the presence of humidity and the regeneration conditions have been assessed. The presence of moisture in the air enhances CO2 capture. The capture material is not properly regenerated in the absence of H2-containing atmosphere or at temperatures below 300 ºC. The exhaustive characterization by XRD, XPS, TEM and temperature programmed reduction and reaction allowed to shed some light about the reasons of the different behavior of Ba and Cs based dual functional materials. Cs is more efficiently utilized than Ba, providing higher CO2 capture capacities (0.44 mmol g−1) and CH4 productivity (0.41 mmol g−1). The outperformance of Cs is attributed to the more homogeneous and better dispersed species which are regenerated at lower temperatures. |
| format | Article |
| id | doaj-art-104f8ad162374da58cd471fac20ec2cc |
| institution | DOAJ |
| issn | 2212-9839 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of CO2 Utilization |
| spelling | doaj-art-104f8ad162374da58cd471fac20ec2cc2025-08-20T02:58:37ZengElsevierJournal of CO2 Utilization2212-98392025-03-019310305410.1016/j.jcou.2025.103054CO2 capture from air and its conversion to CH4 using dual functional materials supported on high surface area graphiteJorge Moral-Pombo0Enrique García-Bordejé1Yuefeng Liu2Antonio Guerrero-Ruiz3Inmaculada Rodríguez-Ramos4Instituto de Catálisis y Petroleoquímica (CSIC), Madrid 28049, Spain; Grupo de Diseño y Aplicación de Catalizadores Heterogéneos, UNED, Unidad Asociada al CSIC por el ICP, SpainInstituto de Carboquímica (ICB-CSIC), Miguel Luesma Castán 4, Zaragoza E-50018, Spain; Corresponding author.Dalian National Laboratory for Clean Energy (DNL), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, ChinaDepartamento de Química Inorgánica y Química Técnica, UNED, Madrid 28040, Spain; Grupo de Diseño y Aplicación de Catalizadores Heterogéneos, UNED, Unidad Asociada al CSIC por el ICP, SpainInstituto de Catálisis y Petroleoquímica (CSIC), Madrid 28049, SpainSeveral cycles of CO2 capture from synthetic air containing 400 ppm of CO2 and subsequent conversion to CH4 have been performed using dual functional materials consisting of 4 wt% Ru and 10 wt% Ba or Cs supported on a high surface area graphite. The effect of the presence of humidity and the regeneration conditions have been assessed. The presence of moisture in the air enhances CO2 capture. The capture material is not properly regenerated in the absence of H2-containing atmosphere or at temperatures below 300 ºC. The exhaustive characterization by XRD, XPS, TEM and temperature programmed reduction and reaction allowed to shed some light about the reasons of the different behavior of Ba and Cs based dual functional materials. Cs is more efficiently utilized than Ba, providing higher CO2 capture capacities (0.44 mmol g−1) and CH4 productivity (0.41 mmol g−1). The outperformance of Cs is attributed to the more homogeneous and better dispersed species which are regenerated at lower temperatures.http://www.sciencedirect.com/science/article/pii/S2212982025000381Direct air captureDual functional materialCO2 capture and catalytic conversionMethane |
| spellingShingle | Jorge Moral-Pombo Enrique García-Bordejé Yuefeng Liu Antonio Guerrero-Ruiz Inmaculada Rodríguez-Ramos CO2 capture from air and its conversion to CH4 using dual functional materials supported on high surface area graphite Journal of CO2 Utilization Direct air capture Dual functional material CO2 capture and catalytic conversion Methane |
| title | CO2 capture from air and its conversion to CH4 using dual functional materials supported on high surface area graphite |
| title_full | CO2 capture from air and its conversion to CH4 using dual functional materials supported on high surface area graphite |
| title_fullStr | CO2 capture from air and its conversion to CH4 using dual functional materials supported on high surface area graphite |
| title_full_unstemmed | CO2 capture from air and its conversion to CH4 using dual functional materials supported on high surface area graphite |
| title_short | CO2 capture from air and its conversion to CH4 using dual functional materials supported on high surface area graphite |
| title_sort | co2 capture from air and its conversion to ch4 using dual functional materials supported on high surface area graphite |
| topic | Direct air capture Dual functional material CO2 capture and catalytic conversion Methane |
| url | http://www.sciencedirect.com/science/article/pii/S2212982025000381 |
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