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- Title
Influence of Support Type and Metal Loading in Methane Decomposition over Iron Catalyst for Hydrogen Production.
- Authors
Ibrahim, Ahmed A.; Al-Fatesh, Ahmed S.; Khan, Wasim U.; Soliman, Mostafa A.; AL Otaibi, Raja L.; Fakeeha, Anis H.
- Abstract
Natural gas resources, stimulate the method of catalytic methane decomposition. Hydrogen is a superb energy carrier and integral component of the present energy systems, while carbon nanotubes exhibit remarkable chemical and physical properties. The reaction was run at 700 °C in a fixed bed reactor. Catalyst calcination and reduction were done at 500 °C. MgO, TiO2 and Al2O3 supported catalysts were prepared using a co-precipitation method. Catalysts of different iron loadings were characterized with BET, TGA, XRD, H2-TPR and TEM. The catalyst characterization revealed the formation of multi-walled nanotubes. Alternatively, time on stream tests of supported catalyst at 700 °C revealed the relative profiles of methane conversions increased as the %Fe loading was increased. Higher %Fe loadings decreased surface area of the catalyst. Iron catalyst supported with Al2O3 exhibited somewhat higher catalytic activity compared with MgO and TiO2 supported catalysts when above 35% Fe loading was used. CH4 conversion of 69% was obtained utilizing 60% Fe/Al2O3 catalyst. Alternatively, Fe/MgO catalysts gave the highest initial conversions when iron loading below 30% was employed. Indeed, catalysts with 15% Fe/MgO gave 63% conversion and good stability for 1 h time on stream. Inappropriateness of Fe/TiO2 catalysts in the catalytic methane decomposition was observed.
- Subjects
CARBON nanotubes; METHANE spectra; HYDROGEN production; IRON catalysts; NATURAL gas
- Publication
Journal of the Chinese Chemical Society, 2015, Vol 62, Issue 7, p592
- ISSN
0009-4536
- Publication type
Article
- DOI
10.1002/jccs.201500052