Evaluation of highly active and stable SiO<sub>2</sub> supported Fe-based catalysts for the catalytic methane decomposition into COx free hydrogen and CNTs
<p>Catalytic methane decomposition is believed to be an economic and environmental friendly route for the production of COx free hydrogen and high quality carbon nanotubes. However, the development of active and stable catalysts remains a significantly challenging research topic. This study de...
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| مؤلفون آخرون: | , , , |
| منشور في: |
2023
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| _version_ | 1864513558834839552 |
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| author | Assem T. Mohamed (16023355) |
| author2 | Sardar Ali (9503753) Anand Kumar (24122) Kartick C. Mondal (16023356) Muftah H. El-Naas (16023359) |
| author2_role | author author author author |
| author_facet | Assem T. Mohamed (16023355) Sardar Ali (9503753) Anand Kumar (24122) Kartick C. Mondal (16023356) Muftah H. El-Naas (16023359) |
| author_role | author |
| dc.creator.none.fl_str_mv | Assem T. Mohamed (16023355) Sardar Ali (9503753) Anand Kumar (24122) Kartick C. Mondal (16023356) Muftah H. El-Naas (16023359) |
| dc.date.none.fl_str_mv | 2023-07-01T00:00:00Z |
| dc.identifier.none.fl_str_mv | 10.1016/j.catcom.2023.106703 |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/journal_contribution/Evaluation_of_highly_active_and_stable_SiO_sub_2_sub_supported_Fe-based_catalysts_for_the_catalytic_methane_decomposition_into_COx_free_hydrogen_and_CNTs/23295341 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Chemical sciences Physical chemistry Engineering Chemical engineering Nanotechnology Catalytic methane decomposition High quality carbon nanotubes Fe catalysts COx free hydrogen |
| dc.title.none.fl_str_mv | Evaluation of highly active and stable SiO<sub>2</sub> supported Fe-based catalysts for the catalytic methane decomposition into COx free hydrogen and CNTs |
| dc.type.none.fl_str_mv | Text Journal contribution info:eu-repo/semantics/publishedVersion text contribution to journal |
| description | <p>Catalytic methane decomposition is believed to be an economic and environmental friendly route for the production of COx free hydrogen and high quality carbon nanotubes. However, the development of active and stable catalysts remains a significantly challenging research topic. This study deals focuses on the development of highly active and stable silica-supported Fe-based catalysts for the thermal decomposition of methane into hydrogen and high quality carbon nanotubes. A series of Fe/SiO<sub>2</sub> catalysts with varying Fe loading in the range between 25 wt% and 100 wt% were synthesized by the solution combustion synthesis (SCS) method. The synthesized catalysts were characterized by various bulk sensitive and surface sensitive analytical tools, such as SEM, XRD, HRTEM, BET and Raman spectroscopy. All supported catalysts exhibited comparatively high activity than the unsupported 100 wt% Fe (denoted as 100F) catalyst which was the least active. Moreover, the catalytic activity in terms of methane conversion, methane decomposition rate, growth activities as well as carbon yields increased with an increase in the Fe loading. At an operating temperature of 650 °C and a GHSV of 8000 h<sup>−1</sup>, the 75FS catalyst, with a composition of 75 wt%/SiO<sub>2</sub>, demonstrated the highest methane decomposition rate of 0.75gCH<sub>4</sub>/g-cat.h among the investigated catalysts. Additionally, after achieving initial stability at about 120 min, this catalyst remained active throughout testing on stream for 900 min. TEM and SEM analysis of the spent catalyst showed that the supported 75FS catalyst produced multi-walled carbon nanotubes with uniform diameters of 28 nm and with I<sub>d</sub>/I<sub>g</sub> ratio of 0.454 whereas the unsupported 100F catalyst mainly produced graphene sheets. </p> <h2>Other Information</h2> <p>Published in: Catalysis Communications <br> License: <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank">http://creativecommons.org/licenses/by/4.0/</a><br> See article on publisher's website: <a href="https://doi.org/10.1016/j.catcom.2023.106703" target="_blank">https://doi.org/10.1016/j.catcom.2023.106703</a> </p> |
| eu_rights_str_mv | openAccess |
| id | Manara2_b2902ea2de8404a393ff44467b836610 |
| identifier_str_mv | 10.1016/j.catcom.2023.106703 |
| network_acronym_str | Manara2 |
| network_name_str | Manara2 |
| oai_identifier_str | oai:figshare.com:article/23295341 |
| publishDate | 2023 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | Evaluation of highly active and stable SiO<sub>2</sub> supported Fe-based catalysts for the catalytic methane decomposition into COx free hydrogen and CNTsAssem T. Mohamed (16023355)Sardar Ali (9503753)Anand Kumar (24122)Kartick C. Mondal (16023356)Muftah H. El-Naas (16023359)Chemical sciencesPhysical chemistryEngineeringChemical engineeringNanotechnologyCatalytic methane decompositionHigh quality carbon nanotubesFe catalystsCOx free hydrogen<p>Catalytic methane decomposition is believed to be an economic and environmental friendly route for the production of COx free hydrogen and high quality carbon nanotubes. However, the development of active and stable catalysts remains a significantly challenging research topic. This study deals focuses on the development of highly active and stable silica-supported Fe-based catalysts for the thermal decomposition of methane into hydrogen and high quality carbon nanotubes. A series of Fe/SiO<sub>2</sub> catalysts with varying Fe loading in the range between 25 wt% and 100 wt% were synthesized by the solution combustion synthesis (SCS) method. The synthesized catalysts were characterized by various bulk sensitive and surface sensitive analytical tools, such as SEM, XRD, HRTEM, BET and Raman spectroscopy. All supported catalysts exhibited comparatively high activity than the unsupported 100 wt% Fe (denoted as 100F) catalyst which was the least active. Moreover, the catalytic activity in terms of methane conversion, methane decomposition rate, growth activities as well as carbon yields increased with an increase in the Fe loading. At an operating temperature of 650 °C and a GHSV of 8000 h<sup>−1</sup>, the 75FS catalyst, with a composition of 75 wt%/SiO<sub>2</sub>, demonstrated the highest methane decomposition rate of 0.75gCH<sub>4</sub>/g-cat.h among the investigated catalysts. Additionally, after achieving initial stability at about 120 min, this catalyst remained active throughout testing on stream for 900 min. TEM and SEM analysis of the spent catalyst showed that the supported 75FS catalyst produced multi-walled carbon nanotubes with uniform diameters of 28 nm and with I<sub>d</sub>/I<sub>g</sub> ratio of 0.454 whereas the unsupported 100F catalyst mainly produced graphene sheets. </p> <h2>Other Information</h2> <p>Published in: Catalysis Communications <br> License: <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank">http://creativecommons.org/licenses/by/4.0/</a><br> See article on publisher's website: <a href="https://doi.org/10.1016/j.catcom.2023.106703" target="_blank">https://doi.org/10.1016/j.catcom.2023.106703</a> </p>2023-07-01T00:00:00ZTextJournal contributioninfo:eu-repo/semantics/publishedVersiontextcontribution to journal10.1016/j.catcom.2023.106703https://figshare.com/articles/journal_contribution/Evaluation_of_highly_active_and_stable_SiO_sub_2_sub_supported_Fe-based_catalysts_for_the_catalytic_methane_decomposition_into_COx_free_hydrogen_and_CNTs/23295341CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/232953412023-07-01T00:00:00Z |
| spellingShingle | Evaluation of highly active and stable SiO<sub>2</sub> supported Fe-based catalysts for the catalytic methane decomposition into COx free hydrogen and CNTs Assem T. Mohamed (16023355) Chemical sciences Physical chemistry Engineering Chemical engineering Nanotechnology Catalytic methane decomposition High quality carbon nanotubes Fe catalysts COx free hydrogen |
| status_str | publishedVersion |
| title | Evaluation of highly active and stable SiO<sub>2</sub> supported Fe-based catalysts for the catalytic methane decomposition into COx free hydrogen and CNTs |
| title_full | Evaluation of highly active and stable SiO<sub>2</sub> supported Fe-based catalysts for the catalytic methane decomposition into COx free hydrogen and CNTs |
| title_fullStr | Evaluation of highly active and stable SiO<sub>2</sub> supported Fe-based catalysts for the catalytic methane decomposition into COx free hydrogen and CNTs |
| title_full_unstemmed | Evaluation of highly active and stable SiO<sub>2</sub> supported Fe-based catalysts for the catalytic methane decomposition into COx free hydrogen and CNTs |
| title_short | Evaluation of highly active and stable SiO<sub>2</sub> supported Fe-based catalysts for the catalytic methane decomposition into COx free hydrogen and CNTs |
| title_sort | Evaluation of highly active and stable SiO<sub>2</sub> supported Fe-based catalysts for the catalytic methane decomposition into COx free hydrogen and CNTs |
| topic | Chemical sciences Physical chemistry Engineering Chemical engineering Nanotechnology Catalytic methane decomposition High quality carbon nanotubes Fe catalysts COx free hydrogen |