Banca de QUALIFICAÇÃO: LUCAS RAFAEL PINTO NOBRE

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : LUCAS RAFAEL PINTO NOBRE
DATA : 05/12/2018
HORA: 15:00
LOCAL: LEAFT
TÍTULO:

Modeling and Simulation of the CO2 Removal Process using Microrreator

PALAVRAS-CHAVES:
PÁGINAS: 110
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
RESUMO:

With the continuous increase in the energy demand for natural gas and the growing concern
with environmental aspects, mainly related to greenhouse gases, CO 2 capture became a
target of relevance for research and industrial interests. The microreactors, in front of
diverse options of application, have been emphasizing in the absorption of CO 2 . In this work,
there was a study of microreactor modeling in the capture of CO 2 of a multicomponent
mixture with characteristics similar to natural gas, composed of CH 4 , N 2 and CO 2 under
atmospheric pressure and ambient temperature. A parameter estimation step was performed
to correctly represent the mass transfer and chemical reaction phenomena. At first, the
physical absorption, in which distilled water (H2O) was present as solvent, was evaluated. It
was also verified the interference of a new component (CH4) in the absorption of CO2. The
influence of variables such as gas velocity, liquid stream velocity, total flow and gas-liquid
ratio were evaluated in several initial compositions. In a second moment, the chemical
absorption of CO2 in experiments with different amine reagents (MEA, EtilEA and TEA) in
H2O as solvent in several concentrations was analyzed. The phenomenological
mathematical model was implemented in MATLAB® to describe and analyze the process.
The parameters were estimated using the Interior Point Method. In the validation step of the
mathematical model, mean absolute errors (MAE) of less than 2% were obtained, showing
an excellent predictive capacity, which made possible a simulation and study of the process.
It was observed that the addition of CH4 did not significantly alter the absorbed amount of
CO2, although the mass transfer resistances were modified. Higher CO 2 uptakes were
obtained at lower gas velocities, higher liquid velocities. It has also been found that a lower
gas-liquid ratio increases the absorption yield, while a higher total flow results in lower mass
transfer resistances. The presence of a chemical reaction intensified the mass transfer,
resulting in enhancement factors greater than 1. Higher concentrations resulted in better
CO2 absorption results. The best-performing reagent was EtilEA.

MEMBROS DA BANCA:
Interno - 1584174 - DOMINGOS FABIANO DE SANTANA SOUZA
Interno - 1547970 - JACKSON ARAUJO DE OLIVEIRA
Externo à Instituição - ANDERSON ALLES DE JESUS - UFRN
Externo à Instituição - JOSE ROBERTO DE SOUZA - CTGás
Externo à Instituição - JUAN ALBERTO CHAVEZ RUIZ - CTGás