Abstract
Natural gas resources, stimulate themethod of catalyticmethane 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 ofmethane 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.
Original language | English |
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Pages (from-to) | 592-599 |
Number of pages | 8 |
Journal | Journal of the Chinese Chemical Society |
Volume | 62 |
Issue number | 7 |
DOIs | |
State | Published - 7 Oct 2015 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:Copyright © 2015 The Chemical Society Located in Taipei & Wiley-VCH Verlag GmbH & Co.
Keywords
- Carbon nanotubes
- Fe catalyst
- H<inf>2</inf> production
- Methane decomposition
- MgO
ASJC Scopus subject areas
- General Chemistry