A5101855081- Calcium Carbonate Crystallization and Inhibition
- Chemical and Physical Properties in Aqueous Solutions
- Bauxite Residue and Utilization
- Carbon Dioxide Capture Technologies
- Advanced ceramic materials synthesis
- Advanced materials and composites
- Petroleum Processing and Analysis
- Enhanced Oil Recovery Techniques
- CO2 Sequestration and Geologic Interactions
- Chemistry and Chemical Engineering
- Thermal and Kinetic Analysis
- Offshore Engineering and Technologies
- Reservoir Engineering and Simulation Methods
- Marine and Offshore Engineering Studies
- Aluminum Alloys Composites Properties
- Methane Hydrates and Related Phenomena
- Phase Equilibria and Thermodynamics
- Thermodynamic properties of mixtures
- Spectroscopy and Chemometric Analyses
- Power System Optimization and Stability
- Industrial Gas Emission Control
- Chemical and Environmental Engineering Research
- Hydrocarbon exploration and reservoir analysis
- Power System Reliability and Maintenance
- Ionic liquids properties and applications
Petrobras (Brazil)
2015-2025
Universidade Federal de São Carlos
2017
Universidade Federal do Rio Grande do Norte
2017
Northern California Research
2000
Carbonate precipitation control is important in separation processes such as those involving the monoethylene glycol (MEG) regeneration process natural gas production plants reduces solubility of these salts. The use sensors that allow continuous monitoring inorganic salts aqueous solutions contributes to optimizing parameters commonly found processes. This work proposes study calcium and strontium carbonate salt H2O + MEG mixtures using near-infrared spectroscopy (NIR) a technique....
The zwitterions resulting from the covalent attachment of 3- or 4-hydroxy benzene to 1,3-dimethylimidazolium cation represent basic compounds (pKa 8.68 and 8.99 in aqueous solutions, respectively) that chemisorb solutions 0.58 mol/mol carbon dioxide at 1.3 bar (absolute) 40 °C. Equimolar amounts chemisorbed CO2 these are obtained 10 Chemisorption takes place through formation bicarbonate solution using imidazolium-containing phenolate. is liberated by simple pressure relief heating,...
In order to represent the thermal effects of operational conditions a monoethylene glycol (MEG) regeneration unit, 86 wt % MEG aqueous solutions with salt concentrations up 5.52 were heated for 56 h in an ebulliometer. Seven analytical techniques applied samples, aiming evaluate degradation. Results demonstrated that increasing sodium chloride concentration from 0 reduced stability time 44 8 h. Thermogravimetric analysis was most adequate studied technique quantify Measurements degradation...
Abstract The design of an offshore chemical EOR project involves not just reservoir engineering, logistics and storage issues. Oil/water separation, produced water treatment, incompatibilities with other chemicals, precipitation on surface facilities high salinity hardness source are among the items that must be evaluated. For polymer flooding, as main injection is seawater or water, will decrease viscosifying power conventional Partially Hydrolyzed Polyacrylamides (PHPA). small pilots,...
Monoethylene glycol (MEG) is used to prevent hydrate formation in subsea pipelines of natural gas production. MEG recovered at an offshore regeneration unit. Sodium chloride the predominant salt water–MEG streams. Thus, knowledge NaCl solubilities process conditions relevant for design and operation a Six isotherms solubility were measured (76 data points) from T = (293.15 403.15) K whole solvent concentration range. The analytical method was based on reproducibility two successive samples....
Monoethylene glycol (MEG) is a gas hydrate inhibitor widely applied for natural flow assurance. A series of density and electrical conductivity measurements water + MEG NaCl mixtures are reported, allowing the supervision regeneration unit. Density (509 data points) (212 were performed in wide ranges temperature, T = 278.15–363.15 K, concentration solvents up to almost saturation. The theory solutions was description using excess volume, which correlated with Redlich–Kister equation....
A methodology is described that studies all N-2 outages-instead of selecting specific double contingency events-and possibly missing some critical ones. Using a power flow program and the capabilities, speed modern computers, case study was performed for more than 25000 outages 230 kV system in generation reactive deficient area. The data generated by computer rims stored database program, reports were using different "queries" analyzing data. results outage directly applicable to analysis...
Vapor–liquid equilibrium (VLE) data for aqueous systems in the presence of electrolytes have many industrial applications. VLE water + monoethylene glycol (MEG) mixtures sodium chloride at low pressures are important to describe effects composition, temperature, and pressure on a MEG (gas hydrate inhibitor) regeneration unit. A modified version Othmer ebulliometer was applied measure reliable NaCl 101.325, 65, 35 kPa. Binary (water NaCl) were also experimentally studied. Vapor determined...
The Brazilian offshore pre-salt cluster is one of the most important recent discoveries hydrocarbon resources in world. These fields normally present high CO2 content (more than 10%) and also Gas Oil Ratio (GOR), thus might limit oil production convention FPSOs project due to capacity complexity gas processing plant. conditions lead application alternative processes for treatment environment, such as molecular sieve dehydration, fixed bed H2S removal membranes. Besides, flow pressure drop...
Monoethylene glycol (MEG) is applied to mitigate natural gas hydrate in subsea pipelines. MEG injected into the wellheads and flows with reservoir fluids platform. reclamation regeneration are conducted, allowing inhibitor reuse thus minimizing operational costs environmental impacts. Four process configurations were evaluated using OLI software, i.e., Full-Stream (FS) Slip-Stream (SS) processes without atmospheric distillation. The conditions from Mexilhão unit (Petrobras/BS) applied....
In order to inhibit natural gas hydrate formation, monoethyleneglycol (MEG) is usually injected into producing well heads. The MEG regeneration process continuously performed at the platform. Scaling problems occur due presence of chlorides and carbonates. This work presents salt solubility data for aqueous system with strontium carbonate, carbon dioxide. A specific analytical method was developed. Thus, experimental carbonate (SrCO3) various dioxide pressures are reported. Solubilities...
Durante o processo de exploração e produção petróleo gás, inibidores formação hidratos como monoetilenoglicol (MEG) são adicionados ao sistema, a fim favorecer garantir viabilidade econômica segurança da operação. Contudo quando em contato com os íons presentes na água formação, MEG pode levar diminuição solubilidade dos sais, potencializando precipitação e, consequentemente, incrustações ocasionando bloqueio linhas parada unidade. Este trabalho visa estudar comportamento sistemas aquosos...
– A unidade de regeneração do monoetilenoglicol (MEG) nas plataformas produção gás natural contém três etapas: pré-tratamento, recuperação e regeneração. Na etapa são coletados dados condutividade elétrica (k) através da coluna salmoura com sensores presente no separador flash medidas densidade (ρ) realizadas para o conhecimento composição sistema. Visando este processo, objetivo estudo é analisar descrever a das fases flash. Para isto, foi construído um planejamento experimental fatorial...
A unidade offshore de regeneração monoetilenoglicol (MEG), inibidor dehidrato gás natural, inclui operações aquecimento. Esse processo ocorre sucessivasvezes, modo que o tempo exposição a temperaturas relativamente elevadas é umavariável importante. fim simular as condições operacionais da planta regeneração,uma solução aquosa MEG 89% m/m com uma concentração cloreto sódio variandoentre 0 e 5% foi processada em um ebuliômetro recirculação fase vapor. Foramcoletadas amostras líquida tempos...