Catalytic decomposition of methane over Fe2O3-Al2O3 catalysts with high iron contents and at high CH4 space velocities
Catalysts Fe2O3-Al2O3 with high Fe2O3 contents (50–90wt%) were prepared by co-precipitation method and tested for methane decomposition and production of high-purity carbon nanofibers (CNFs). Catalytic tests were conducted in a fixed-bed reactor at atmospheric pressure, different temperatures and hi...
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KeAi Communications Co., Ltd.
2025-12-01
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772443325000339 |
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| author | Shuang Li Junyi Liao Zhanguo Zhang Guangwen Xu |
| author_facet | Shuang Li Junyi Liao Zhanguo Zhang Guangwen Xu |
| author_sort | Shuang Li |
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| description | Catalysts Fe2O3-Al2O3 with high Fe2O3 contents (50–90wt%) were prepared by co-precipitation method and tested for methane decomposition and production of high-purity carbon nanofibers (CNFs). Catalytic tests were conducted in a fixed-bed reactor at atmospheric pressure, different temperatures and high CH4 space velocities. The catalytic tests performed at 700 °C showed that Fe2O3-Al2O3 catalysts containing 60–80wt% Fe2O3 enable a maximal CH4 conversion of around 56 % and production of CNFs with a purity above 95 %. Further, the catalytic results recorded over 80 % Fe2O3-Al2O3 catalyst at varied temperatures and space velocities revealed the following: (1) increasing temperature leads to an increased maximum CH4 conversion but a reduced CNFs productivity per unit weight of catalyst, and (2) CNFs productivity can be maximized at each temperature by lowering CH4 space velocity to an appropriate rate through reducing CH4 feed rate or increasing the amount of catalyst fed in the reactor. Moreover, typical SEM, Raman and TEM characterization results confirmed that the CNFs obtained are of a relatively narrow diameter distribution of 20–40 nm and graphitic nanostructure in appearance. Furthermore, electroconductivity measurement of typical CNFs products confirmed their good electrical conductivity, suggesting their potential direct use for formulation of anti-static CNFs reinforced plastic composites. |
| format | Article |
| id | doaj-art-f66beb17e01e4c28ab1bd2b273c2f52a |
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| language | English |
| publishDate | 2025-12-01 |
| publisher | KeAi Communications Co., Ltd. |
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| series | Resources Chemicals and Materials |
| spelling | doaj-art-f66beb17e01e4c28ab1bd2b273c2f52a2025-08-20T03:14:36ZengKeAi Communications Co., Ltd.Resources Chemicals and Materials2772-44332025-12-014410012310.1016/j.recm.2025.100123Catalytic decomposition of methane over Fe2O3-Al2O3 catalysts with high iron contents and at high CH4 space velocitiesShuang Li0Junyi Liao1Zhanguo Zhang2Guangwen Xu3Key Laboratory of Resources Chemicals and Materials (Shenyang University of Chemical Technology), Ministry of Education, Shenyang 110142, China; College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, ChinaKey Laboratory of Resources Chemicals and Materials (Shenyang University of Chemical Technology), Ministry of Education, Shenyang 110142, ChinaKey Laboratory of Resources Chemicals and Materials (Shenyang University of Chemical Technology), Ministry of Education, Shenyang 110142, China; College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China; Corresponding authors.Key Laboratory of Resources Chemicals and Materials (Shenyang University of Chemical Technology), Ministry of Education, Shenyang 110142, China; College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China; Corresponding authors.Catalysts Fe2O3-Al2O3 with high Fe2O3 contents (50–90wt%) were prepared by co-precipitation method and tested for methane decomposition and production of high-purity carbon nanofibers (CNFs). Catalytic tests were conducted in a fixed-bed reactor at atmospheric pressure, different temperatures and high CH4 space velocities. The catalytic tests performed at 700 °C showed that Fe2O3-Al2O3 catalysts containing 60–80wt% Fe2O3 enable a maximal CH4 conversion of around 56 % and production of CNFs with a purity above 95 %. Further, the catalytic results recorded over 80 % Fe2O3-Al2O3 catalyst at varied temperatures and space velocities revealed the following: (1) increasing temperature leads to an increased maximum CH4 conversion but a reduced CNFs productivity per unit weight of catalyst, and (2) CNFs productivity can be maximized at each temperature by lowering CH4 space velocity to an appropriate rate through reducing CH4 feed rate or increasing the amount of catalyst fed in the reactor. Moreover, typical SEM, Raman and TEM characterization results confirmed that the CNFs obtained are of a relatively narrow diameter distribution of 20–40 nm and graphitic nanostructure in appearance. Furthermore, electroconductivity measurement of typical CNFs products confirmed their good electrical conductivity, suggesting their potential direct use for formulation of anti-static CNFs reinforced plastic composites.http://www.sciencedirect.com/science/article/pii/S2772443325000339Fe2O3-Al2O3 catalystMethane decompositionSpace velocityCNFsHigh productivity |
| spellingShingle | Shuang Li Junyi Liao Zhanguo Zhang Guangwen Xu Catalytic decomposition of methane over Fe2O3-Al2O3 catalysts with high iron contents and at high CH4 space velocities Resources Chemicals and Materials Fe2O3-Al2O3 catalyst Methane decomposition Space velocity CNFs High productivity |
| title | Catalytic decomposition of methane over Fe2O3-Al2O3 catalysts with high iron contents and at high CH4 space velocities |
| title_full | Catalytic decomposition of methane over Fe2O3-Al2O3 catalysts with high iron contents and at high CH4 space velocities |
| title_fullStr | Catalytic decomposition of methane over Fe2O3-Al2O3 catalysts with high iron contents and at high CH4 space velocities |
| title_full_unstemmed | Catalytic decomposition of methane over Fe2O3-Al2O3 catalysts with high iron contents and at high CH4 space velocities |
| title_short | Catalytic decomposition of methane over Fe2O3-Al2O3 catalysts with high iron contents and at high CH4 space velocities |
| title_sort | catalytic decomposition of methane over fe2o3 al2o3 catalysts with high iron contents and at high ch4 space velocities |
| topic | Fe2O3-Al2O3 catalyst Methane decomposition Space velocity CNFs High productivity |
| url | http://www.sciencedirect.com/science/article/pii/S2772443325000339 |
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