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Ni natural clay-supported catalysts for dry reforming of methane
| Content Provider | Semantic Scholar |
|---|---|
| Author | Liu, Hua-Ji Costa, Patrick Da Taief, Haithem Bel Hadj Benzinab, M. Galvez, Maria Elena |
| Copyright Year | 2018 |
| Abstract | Mg-promotion of natural clay based Ni-catalysts was considered, as a way of boosting the dry reforming of methane (DRM) activity of these materials. The results of the DRM experiments performed at temperatures from 600 C to 850 C evidenced much higher methane and CO2 conversions for the Mg-promoted catalysts. Mg-promotion led of course to a significant increase of CO2-adsorption ability (basicity). However, the increased catalytic activity of the Mg-promoted materials was rather linked to increased Ni-dispersion and Ni crystallite size. Indeed, independent of the physico-chemical properties of the support, the presence of Mg led to the formation of a MgNiO2 mixed phase that, upon reduction, resulted in the formation of metallic Ni clusters having sizes around 7–9 nm, considerably smaller than in any of the non-promoted catalysts. Carbon formation was found to take place to a greater extent in the presence of the Mg-promoted catalysts, due to C–H bond activation leading also to favored direct methane decomposition (DMD). In spite of this, the activity of the Mg-promoted catalysts was well maintained over 5 hour DRM experiments performed at 750 C. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://pubs.rsc.org/en/content/articlepdf/2018/ra/c8ra02615g |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
