Preferential oxidation of CO in a H2-rich stream over multi-walled carbon nanotubes confined Ru catalysts
| Autor: | Kangmin Xie, Yuxian Gao, Shiyang Mi, Ning Liu, Weixin Huang, Wendong Wang |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology Nanoparticle chemistry.chemical_element Carbon nanotube Atmospheric temperature range Condensed Matter Physics Catalysis law.invention symbols.namesake Fuel Technology X-ray photoelectron spectroscopy Chemical engineering chemistry law symbols Organic chemistry Fourier transform infrared spectroscopy Raman spectroscopy Carbon |
| Zdroj: | International Journal of Hydrogen Energy. 38:16665-16676 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2013.04.070 |
| Popis: | Multi-walled carbon nanotubes (MWNTs) confined Ru catalysts were prepared by a modified procedure using ultrasonication-aided capillarity action to deposit Ru nanoparticles onto MWNTs inner surface. The structure properties of MWNTs supports and Ru catalysts were extensively characterized by XRD, TGA, H 2 -TPR, XPS, TEM, FTIR and Raman spectra. The catalytic performance in the preferential oxidation of CO in a H 2 -rich stream was examined in detail with respect to the influences of Ru loading, MWNTs diameter, various pretreatment conditions, and the presence of CO 2 and H 2 O in the feed stream. In contrast with Ru catalysts supported on MWNTs external surface and other carbon materials, the superior activity was observed for the MWNTs-confined Ru catalyst, which was discussed intensively in terms of the confinement effect of carbon nanotubes. The optimized catalyst of 5 wt.% Ru confined in MWNTs with diameter of 8–15 nm can achieve the complete CO conversion in the wider temperature range and the favorable stability at 80 °C under the simulated reformatted gas mixture, which proves a promising catalyst for preferential CO oxidation in H 2 -rich stream. |
| Databáze: | OpenAIRE |
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