Catalytic behavior of bimetallic Ni–Fe systems in the decomposition of 1,2-dichloroethane. Effect of iron doping and preparation route
| Autor: | Buyanov Roman A, Pavel E. Plyusnin, Nikolay V. Kutaev, Yury V. Shubin, Ilya V. Mishakov, Yuri I. Bauman, Aleksey A. Vedyagin |
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| Rok vydání: | 2017 |
| Předmět: |
inorganic chemicals
Materials science Aqueous solution Coprecipitation Inorganic chemistry chemistry.chemical_element 02 engineering and technology 1 2-Dichloroethane 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Chloride Catalysis 0104 chemical sciences Nickel chemistry.chemical_compound chemistry medicine Physical and Theoretical Chemistry 0210 nano-technology Bimetallic strip medicine.drug Solid solution |
| Zdroj: | Reaction Kinetics, Mechanisms and Catalysis. 121:413-423 |
| ISSN: | 1878-5204 1878-5190 |
| DOI: | 10.1007/s11144-017-1180-4 |
| Popis: | Model bimetallic Ni–Fe catalysts were prepared by coprecipitation from aqueous solutions of nitrates and by mechanical alloying of metal powders. Pure nickel samples subjected to the similar procedures were used as references. The obtained samples were characterized by scanning electron microscopy and X-ray diffraction analysis. Catalytic chemical vapor deposition of 1,2-dichloroethane over the catalysts was studied in a quartz flow reactor equipped with a McBain balance. It was shown that in the case of coprecipitation followed by reduction, Ni–Fe solid solution is formed within the studied range of Fe loading (1–10 wt%). Activation times of 6 min and longer are required to obtain this solid solution by the mechanical alloying method. Despite the known catalytic activity of nickel and iron in hydrocarbon decomposition in accordance with carbide cycle mechanism, iron doping was found to worsen the behavior of nickel in the studied reaction where chlorinated alkane plays a role of substrate to be decomposed. The formation of thermodynamically more stable iron chloride in relation to nickel chloride leads to deactivation of the catalyst and deceleration of the overall process. |
| Databáze: | OpenAIRE |
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