Banca de QUALIFICAÇÃO: ARTHUR VINICIUS VALE BEZERRA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : ARTHUR VINICIUS VALE BEZERRA
DATE: 27/11/2025
TIME: 14:00
LOCAL: Auditório do Nupeg
TITLE:

Vapor-liquid equilibria applied to mixtures containing hydrocarbons of vegetable origin

KEY WORDS:

Molecular thermodynamics, ebulliometer, green diesel, saturated hydrocarbon, fatty acids

PAGES: 39
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Operações Industriais e Equipamentos para Engenharia Química
SPECIALTY: Operações de Separação e Mistura
SUMMARY:

The use of clean and renewable energy sources is a practice that has been gaining increasing space and visibility in the energy generation sector due to the growing energy demand over the years and the environmental impact caused by fossil fuels. There has been a continuous pursuit of renewable sources for the production of alternative biofuels. Among the biofuel alternatives, green diesel or renewable diesel has stood out for its increasing global use, aiming to replace fossil diesel, as it possesses equal or even superior properties compared to conventional diesel. The production of paraffinic hydrocarbons (green diesel) from renewable routes, such as vegetable oils, generates saturated and unsaturated fatty acids that must be separated from these hydrocarbons. On the other hand, there has been growing interest in the thermodynamic properties and phase equilibrium data of fatty systems, involving mixtures containing fatty acids, esters, alcohols, triacylglycerols, and multicomponent systems such as edible oils, fats, and biodiesel. However, experimental data on the thermophysical properties and phase equilibria of these systems are scarce in the literature. The experimental determination of phase equilibrium data is the objective of this study, aiming to contribute to the design of green diesel production processes, more specifically, to the separation (distillation) between the paraffinic hydrocarbon (renewable diesel) and other deoxygenation components, such as saturated and unsaturated fatty acids and unsaturated hydrocarbons. Initially, binary mixtures composed of ethanol + oleic acid and ethanol + linoleic acid were studied, with the experimental determination of vapor-liquid equilibrium (VLE) data, ranging from the infinite dilution condition of fatty acids in ethanol (mass composition of 1 to 5% acid) up to 30%. These data will be complemented with literature data for the construction of phase diagrams for these systems, followed by computational thermodynamic modeling consisting of the correlation and prediction of the experimental VLE data for each studied system. The study will also include the selection of a representative synthetic system for mixtures containing saturated hydrocarbons (green diesel) derived from vegetable oil.

COMMITTEE MEMBERS:
Interna - ***.000.000-** - FEDRA ALEXANDRA DE SOUSA VAQUERO MARADO FERREIRA - UFRN
Interno - 1670497 - HUMBERTO NEVES MAIA DE OLIVEIRA
Interno - 1149554 - OSVALDO CHIAVONE FILHO