Detalhes bibliográficos
| Autor(a) principal: |
Fabiano, Demian Patrick |
| Data de Publicação: |
2006 |
| Tipo de documento: |
Dissertação
|
| Idioma: |
por |
| Título da fonte: |
Repositório Institucional da UFU |
| Texto Completo: |
https://repositorio.ufu.br/handle/123456789/15202
|
Resumo: |
Motivated by the search of alternative sources of production of fuels, this dissertation had the objective of studying the activity and the selectivity of cobalt supported on niobium oxide (Co/Nb2O5) for the synthesis reaction of Fischer-Tropsch in slurry reactor. The following variables were evaluated: cobalt loading, reaction temperature, reaction pressure and H2/CO ratio of the syngas. The catalysts were prepared by the precipitation method and characterized by atomic absorption spectroscopy, BET surface area, particle size analysis and temperature programmed CO desorption (TPD-CO). The increase of temperature favored the increase of the activity of the catalyst. The catalyst 10%Co/Nb2O5, at 250ºC and 20 bar, obtained a maximum of production of heavy hydrocarbons (73%) allied with a high activity (XCO=65%). The reduction of the pressure from 20 to 10 bar caused a reduction in the activity of the catalyst, but did not influenced the distribution of products. The composition of the syngas had great influence in the activity, selectivity, and lower H2/CO ratio resulted on a high selectivity to heavy hydrocarbons. |