Comparative study of 1,2-dichlorethane decomposition over Ni-based catalysts with formation of filamentous carbon
| Autor: | Buyanov Roman A, Yurii I. Bauman, Yury V. Shubin, Ilya V. Mishakov, Denis V. Korneev, Aleksey A. Vedyagin |
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| Rok vydání: | 2018 |
| Předmět: |
inorganic chemicals
Materials science Hydrogen Coprecipitation Inorganic chemistry chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis 0104 chemical sciences Nickel chemistry Metal dusting Carbon nanotube supported catalyst 0210 nano-technology Carbon Filamentous carbon |
| Zdroj: | Catalysis Today. 301:147-152 |
| ISSN: | 0920-5861 |
| DOI: | 10.1016/j.cattod.2017.05.015 |
| Popis: | Catalytic chemical vapor deposition of 1,2-dichlorethane over Ni-based catalysts into carbon nanostructured materials was studied. The catalysts were prepared by mechanochemical activation and by metal dusting of bulk nickel-containing alloy precursors. Model Ni-M alloys, where M is Co, Cu, and Fe, were obtained by coprecipitation technique. Loading of M in the samples was varied in a range of 1–5 at.%. Pure nickel was used a reference. The kinetics of carbon deposition was investigated using flow reactor equipped with McBain balances. The samples of carbon product were characterized by nitrogen adsorption, scanning and transmission electron microscopies. The hydrogen addition into reaction mixture was shown to have opposite effect on both catalytic behavior and carbon yield depending on catalyst’s nature. Segmented structure of carbon filaments formed specifies its developed surface area. Both bulk chlorination of nickel particles and its blockage by dense carbon deposits in the case of mechanochemically prepared samples were suggested to be responsible for rapid deactivation of the catalyst. |
| Databáze: | OpenAIRE |
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