| Autor: |
de Araujo, Gabriel E., de Castro, Jéssica H., Monteiro, Wesley F., de Lima, Jeane, Ligabue, Rosane A., Lourega, Rogerio V. |
| Zdroj: |
Reaction Kinetics, Mechanisms and Catalysis; December 2021, Vol. 134 Issue: 2 p743-757, 15p |
| Abstrakt: |
The current work determines the maximum concentrations of pollutants that interfere significantly in the process, mainly in the catalyst. With this, the study tested the impact of oxygen, sulfur dioxide and nitrogen monoxide on NiO/SiO2commercial catalyst more used in this process. Besides this, from reactions with and without contaminants, the catalyst was characterized through TGA, FESEM and TEM in order to evaluate the impact of each element on its morphology. Experiments with the presence of the oxygen showed that the O2consumes the hydrogen and produces more water, reducing the CO2conversion and CH4formation. Sulfur showed a significant impact at the reducing of its activity catalyst in concentrations above 5 ppm. Nitrogen monoxide, which is a major component of NOx showed to be little harmful to the catalyst, changing the reaction stability at the CO2conversion. Both NO and SO2changed the catalyst morphology and ripped apart the nickel particles from the support, decreasing the catalyst activity over time. |
| Databáze: |
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