Nombre: GABRIELA DE CARVALHO BRITO
Tipo: MSc dissertation
Fecha de publicación: 29/05/2018
Supervisor:
Nombre |
Rol |
|---|---|
| DANIEL DA CUNHA RIBEIRO | Co-advisor * |
| MARCELO SILVEIRA BACELOS | Advisor * |
Junta de examinadores:
| Nombre |
Rol |
|---|---|
| ANA PAULA MENEGUELO | Internal Examiner * |
| DANIEL DA CUNHA RIBEIRO | Co advisor * |
| LEONARDO DA SILVA ARRIECHE | External Alternate * |
| MARCELO SILVEIRA BACELOS | Advisor * |
| RENATO DO NASCIMENTO SIQUEIRA | External Examiner * |
Páginas
Resumen: There are many technologies available to transform gas into liquid products with a higher commercial value, and the most developed technique, discussed in this work, uses a three-phase (gas-liquid-solid) slurry bubble column reactor. The proper operation of this reactor depends on the distribution of the three phases throughout the whole fluid bed. In order to favour configurations that attend such standard, the commercial software ANSYS Fluent was used to predict the multiphase flow in a bubble column with 1.05 m high and 0.102 m in diameter. For a superficial gas velocity of 0.02 m/s, gas velocity and holdup distribution profiles were predicted, at 0.56 m high. They were compared to experimental results reported in literature. Analyzing the results obtained, it has been found that a Euler-Euler turbulent bi-dimensional modeling with a non uniform inlet distribution proposed by Vitankar e Joshi (2002) resulted in the best experimental data prediction for air velocity and holdup distribution. It has also been concluded that an increase in the specific mass of the solid led to an accumulation of this phase in the bottom of the column and a lack of solids in upper region, impairing the chemical transformations proposed to the slurry bubble column reactor. A similar result was found when the solids diameter was increased in the system.
