Selective formation of aniline over nanogold incorporated cobalt loaded SBA 15 catalysts
| Autor: | Suraja Viswanathan, Pradeepan Periyat, Zahira Yaakob, Silija Padikkaparambil, Binitha N. Narayanan |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Mechanical Engineering Inorganic chemistry chemistry.chemical_element Catalysis Nitrobenzene chemistry.chemical_compound Aniline chemistry Chemical engineering Mechanics of Materials Colloidal gold General Materials Science Selective reduction Mesoporous material Cobalt Scherrer equation |
| Zdroj: | Journal of Porous Materials. 21:251-262 |
| ISSN: | 1573-4854 1380-2224 |
| Popis: | Nanogold was dispersed over cobalt-loaded SBA 15 to create an effective redox catalyst. The support was identified as spinel Co3O4 attached to mesoporous SBA 15 based on XRD, FTIR and TEM analyses. The gold crystallites were found to be in the nanosize range (8–15 nm) by the application of the Scherrer equation to the XRD data. XPS analysis provided insight into the state of the gold nanoparticles. The selective hydrogenation of nitrobenzene over nanogold doped cobalt-loaded SBA 15 catalysts was investigated in a fixed bed down flow reactor. The selectivity for the desired product, aniline, was very high with a maximum conversion of 98.9 % of nitrobenzene. The high catalytic performance is attributed to the efficient dispersion of gold nanoparticles over the support. Performing the reaction in the flow reactor maximizes the access of the reactants to the catalysts without the aid of any solvent, which further eliminates the filtration steps required to remove the catalyst after the reaction. Conducting the reaction at 200 °C facilitates the recovery of the product (aniline), from the catalyst, as soon as it is formed. |
| Databáze: | OpenAIRE |
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