Banca de DEFESA: LUIZ EDUARDO PEREIRA SANTIAGO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : LUIZ EDUARDO PEREIRA SANTIAGO
DATA : 09/03/2018
HORA: 09:30
LOCAL: CATRE
TÍTULO:

"Modeling and Simulation of Tubular Reactors Filled with Inerts"

PALAVRAS-CHAVES:

Transesterification, supercritical, fixed bed reactor, optimization, modeling.

PÁGINAS: 61
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
RESUMO:

The continuous process of transesterification at supercritical conditions in tubular reactors rises as a new technology that will ensure viable large-scale biodiesel production. The idiosyncrasies of this process are related to the simplified separation processes, use of low quality feedstock, catalyst free and short reaction time (compared to the conventional processes). In these types of studies, the recent breakthroughs demonstrate that an inert bed (mixing promoters) may be a feasible alternative to enhance tubular reactor performance when operated at supercritical conditions. However, a rigorous phenomenological analysis of this new process layout is scarce in literature, which creates some limitations for a complete understanding of the process. Thus, the main objective of the current work is to develop a mathematical model of the process and analyze triglyceride alcoholysis at supercritical conditions using a continuous tubular reactor packed with glass spheres. The operating variables evaluated are temperature (300, 350 and 400°C), volumetric flowrate (0.5 mL/min and 1.0 mL/min) and bed porosity (0.42, 0.38 and 0.32). The experimental data were evaluated for the oil /alcohol molar ratio of 1:40 and operating pressure of 15 MPa. The model parameters were estimated using the particle swarm optimization algorithm (PSO), which is a classical heuristic optimization technique. The phenomenological characteristics were analyzed based on the description of multiple gradients along with the false-transient method. The results obtained by the model were able to predict 89% of the experimental data. The higher conversions in esters were achieved for the highest temperature and lowest porosity. Therefore, the use of inert bed intensified the ester production, decreased reaction time as well as the thermal degradation of esters.

MEMBROS DA BANCA:
Presidente - 1547970 - JACKSON ARAUJO DE OLIVEIRA
Interno - 1584174 - DOMINGOS FABIANO DE SANTANA SOUZA
Externo ao Programa - 2307830 - SEBASTIAO RIBEIRO FERREIRA
Externo à Instituição - JUAN ALBERTO CHAVEZ RUIZ - CTGás