Selective hydrogenation of CO 2 into CO on a highly dispersed nickel catalyst obtained by magnetron sputtering deposition: A step towards liquid fuels
| Autor: | Liane M. Rossi, Carlos S. B. Dias, Lucas L. R. Vono, Robert Wojcieszak, Erico Teixeira-Neto, Heberton Wender, Renato V. Gonçalves |
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| Přispěvatelé: | Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Inorganic chemistry chemistry.chemical_element 02 engineering and technology 010402 general chemistry 7. Clean energy 01 natural sciences Catalysis Methane Water-gas shift reaction chemistry.chemical_compound Sputtering Incipient wetness impregnation ComputingMilieux_MISCELLANEOUS General Environmental Science Process Chemistry and Technology [CHIM.CATA]Chemical Sciences/Catalysis Sputter deposition Atmospheric temperature range 021001 nanoscience & nanotechnology 0104 chemical sciences Nickel NÍQUEL chemistry 13. Climate action 0210 nano-technology |
| Zdroj: | Applied Catalysis B. Environmental Applied Catalysis B. Environmental, 2017, Applied Catalysis B. Environmental, 209, pp.240-246. ⟨10.1016/j.apcatb.2017.02.081⟩ Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| Popis: | The transformation of CO2 into CO through the reverse water gas shift (RWGS) reaction is very sensitive to the metal particle size and metal-support interactions. Indeed, large metallic particles or aggregates tend to produce more methane than CO. In this context, magnetron sputtering deposition was explored here for the preparation of highly dispersed nickel catalyst supported on silica. The Ni catalyst prepared for 30 min of sputtering time contains 2.4 wt% of Ni, small metal particles size (2.3 nm) and controlled composition (77% Ni, 23% Ni oxides). In-situ XANES under RWGS reaction conditions indicates reduction of nickel in the temperature range from 250 to 500 °C. The conversion of CO2 into CO through the RWGS reaction was close to the thermodynamic equilibrium values for 1:1 and 1:4 (CO2:H2) gas composition at temperature as high as 800 °C. CO was produced continuously for 40 h at 660 °C without significant drop of activity. The overall catalytic performance was superior to that of a classical catalyst prepared by incipient wetness impregnation, as evidenced by the higher activity at T > 600 °C and stability for a long time on stream. |
| Databáze: | OpenAIRE |
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