Banca de QUALIFICAÇÃO: LUIZ EDUARDO PEREIRA SANTIAGO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : LUIZ EDUARDO PEREIRA SANTIAGO
DATE: 22/12/2023
TIME: 14:30
LOCAL: Virtual
TITLE:

Desulfurization of fuel by extraction using microdevices

KEY WORDS:

PEG 300, 400; Extractive Desulfurization; Microdevices; Two-Phase Flow; Mass Transfer; Digital Image Colimetry.

PAGES: 93
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Operações Industriais e Equipamentos para Engenharia Química
SPECIALTY: Operações de Separação e Mistura
SUMMARY:

Conventional methods for removing sulfur compounds perform poorly especially when treating aromatic compounds. Current studies have directed efforts to investigate extractive desulfurization (EDS) using microdevices. Microdevices are units with micrometer-sized channels that enhance mass and heat transfer phenomena. For EDS in microdevices to be viable, it is essential to choose the appropriate extractor solvent used. Among the possibilities, an excellent candidate is polyethylene glycol (PEG). The present work aims to analyze the use of PEG 300 and PEG 400 in the removal of dibenzothiophene. The identification of flow patterns was carried out using digital image colorimetry, making it possible to estimate the specific interfacial area and the volumetric mass transfer coefficient. The experiments followed na experimental logic that allowed extracting insights into deep desulfurization. In addition, the mass transfer phenomena involved and the application of the best experimental conditions in a real diesel sample were evaluated. The results obtained with model fuel were able to achieve 99.36% DBT removal with 1.0 minute residence time, 1:1 volumetric ratio, and three extraction cycles. Furthermore, applying the best experimental conditions to diesel, the total sulfur concentration decreased from 1646 to 312 ppm, resulting in an extractive efficiency of 81.04%.

COMMITTEE MEMBERS:
Presidente - 1584174 - DOMINGOS FABIANO DE SANTANA SOUZA
Interno - 3304882 - CARLOS EDUARDO DE ARAÚJO PADILHA
Externo ao Programa - 2302898 - ELEDIR VITOR SOBRINHO - UFRNExterno à Instituição - JUAN ALBERTO CHAVEZ RUIZ - ISI-ER