Banca de DEFESA: MÁRIO HERMES DE MOURA NETO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : MÁRIO HERMES DE MOURA NETO
DATE: 22/07/2026
TIME: 16:00
LOCAL: Auditório do NUPEG e meet.google.com/cef-pdys-xov
TITLE:

Simulation of the MEG Regeneration Unit for Offshore Natural Gas Production: Application of Electrolyte Thermodynamic Models for Process Design and Optimization

KEY WORDS:

Mixed-Solvent Electrolyte model; hydrate inhibitor; MEG recovery and regeneration; phase equilibria; process simulation.

PAGES: 82
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Operações Industriais e Equipamentos para Engenharia Química
SPECIALTY: Operações de Separação e Mistura
SUMMARY:

Monoethylene glycol (MEG) is widely applied to mitigate the formation of natural gas hydrates in subsea production pipelines. MEG is injected at the wellheads and mixes with the production flow up to the platform, where it is recovered and regenerated. Thus, its reuse is enabled, with reduced operating costs and environmental impacts. In this work, a thermodynamically consistent simulation was developed, considering the presence of electrolytes in the MEG regeneration process system. The OLI Flowsheet software was applied with the Mixed-Solvent Electrolyte (MSE) model. The water–MEG–electrolyte system was simulated, and calculations of physicochemical properties, phase equilibrium, and salt solubility were validated using experimental data. Four process configurations were evaluated: Full-Stream (FS) and Slip-Stream (SS), with and without atmospheric pre-distillation, under operating conditions representative of the Mexilhão unit, in the Santos Basin. The simulations considered pressure and temperature variations in the flash evaporator and in the vacuum distillation column, as well as different solvent compositions in the inlet stream of the MEG Regeneration Unit. The results indicated MEG recovery higher than 99% under feasible conditions, with satisfactory representation of the system properties for the various water–MEG solvent compositions studied. The FS configurations obtained recovered MEG with higher purity, reaching up to 97 wt%, with higher energy consumption, up to 22.3 GW·h. The SS configurations presented lower energy demand, equal to or lower than 18 GW·h, but resulted in higher water content in the recovered MEG, up to 40 wt%. The developed modeling allowed the evaluation and comparison of the performance of the configurations, the identification of feasible operating regions, and the selection of the most suitable alternative according to the requirements among MEG recovery, purity, and energy consumption.

COMMITTEE MEMBERS:
Presidente - 1149554 - OSVALDO CHIAVONE FILHO
Externo à Instituição - ANDERSON ALLES DE JESUS - UFMA
Externo à Instituição - HERBERT SENZANO LOPES - UFRN
Externa à Instituição - MARIA CARLENISE PAIVA DE ALENCAR MOURA - UFRN
Externo à Instituição - MATEUS FERNANDES MONTEIRO - UFRN