Catalizadores de Ni-Co/Al2O3 obtenidos por Combustión de Matriz de Urea espontánea y controlada para producir H2 por APR de Glicerol
The aim is to improve the interaction and dispersion of Ni/Co in catalysts supported on γ-Al2O3 by controlling the temperature in the preparation by the urea matrix combustion method (CCMU). The resulting samples are used to obtain H2 by aqueous phase reforming (APR) of glycerol. Ni and Co nitrates...
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| Autores principales: | , , , |
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| Formato: | Online |
| Lenguaje: | spa |
| Publicado: |
Facultad de Ciencias Aplicadas a la Industria
2023
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| Acceso en línea: | https://revistas.uncu.edu.ar/ojs3/index.php/revicap/article/view/7447 |
| Sumario: | The aim is to improve the interaction and dispersion of Ni/Co in catalysts supported on γ-Al2O3 by controlling the temperature in the preparation by the urea matrix combustion method (CCMU). The resulting samples are used to obtain H2 by aqueous phase reforming (APR) of glycerol. Ni and Co nitrates are co-impregnated with urea, dried and fixed by heating with different temperature ramps (R1, R5 and R10) to obtain 1.5% Ni and 4.5% Co. The physicochemical properties are characterized by N2 sortometry and CO chemisorption. Its behavior is analyzed in APR of glycerol with 0.5 g of catalyst reduced at 500 ºC. Production and selectivity to H2, reaction stability and deactivation by coke are analyzed by temperature programmed oxidation (TPO). The CCMU-R10 catalyst shows improved H2 performance and greater metallic dispersion compared to the same catalyst prepared by spontaneous combustion, without temperature control, CMU. Controlling the combustion of urea improves the Ni/Co interaction, increasing the yield to H2 by 74%, with equal selectivity to H2 and CH4 and reducing the coke accumulated in the same period in APR of glycerol in the selected reaction conditions by 21%. |
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