A5021596623- Petroleum Processing and Analysis
- Hydrocarbon exploration and reservoir analysis
- Enhanced Oil Recovery Techniques
- Corrosion Behavior and Inhibition
- Mass Spectrometry Techniques and Applications
- Hydrogen embrittlement and corrosion behaviors in metals
- Metal and Thin Film Mechanics
- Analytical Chemistry and Chromatography
- Image Processing and 3D Reconstruction
- Infant Health and Development
- DNA Repair Mechanisms
- Facilities and Workplace Management
- Real-time simulation and control systems
- Chemical Thermodynamics and Molecular Structure
- Comparative and International Law Studies
- Neonatal Respiratory Health Research
- Financial Reporting and Valuation Research
- Childhood Cancer Survivors' Quality of Life
- Metabolomics and Mass Spectrometry Studies
- Geography and Environmental Studies
- Dutch Social and Cultural Studies
- Traumatic Brain Injury and Neurovascular Disturbances
- Vibration and Dynamic Analysis
- Agricultural and Food Sciences
- Force Microscopy Techniques and Applications
Universidade Federal do Espírito Santo
2017-2023
Instituto Federal do Espírito Santo
2017-2023
Naphthenic acids (NAs), present in a typical Brazilian acid crude oil and its thermal degradation products, were investigated using two separation methodologies: solid-phase extraction (SPE) liquid–liquid (LLE). Fractions produced characterized by proton nuclear magnetic resonance spectroscopy (1H NMR) negative-ion-mode electrospray ionization Fourier transform ion cyclotron mass spectrometry (ESI(−)-FT-ICR MS). Of the NAs methods studied, SPE was more efficient than LLE. Further,...
Asphaltenes are defined as the petroleum fraction insoluble in n-alkanes and soluble aromatic solvents, such toluene. Such definition implies that asphaltenes not a homogeneous material but mixture of fractions. represent one major contributors to several problematic issues for industry. Destabilized can cause arterial clogging within pipelines wellbores, corrosion fouling production equipment, reduction catalyst activity refining processes, other problems. This work describes an...
Two methods of asphaltenes fractionation have been employed to facilitate the characterization their respective subfractions. The are based on step-wise precipitation with different n-hexane/crude oil ratios, and adsorption onto CaCO3. Three subfractions were produced for each method, being named 3.5 V, 3.5–6 6–40 V (for first method); non-adsorbed (bulk), adsorbed, irreversibly adsorbed second method). fractions characterized by elementary analysis, nuclear magnetic resonance proton (1H...
Microscopic techniques were combined to study the influence of corrosion rate on morphologic behavior AISI 1020 steel specimens submitted thermal degradation a typical acid crude oil (total number (TAN) = 2.1390 mg KOH g -1 and total sulfur (S) 0.7778 wt.%).The used light microscopy (LM), scanning electron microscopy/energy dispersive spectroscopy (SEM/EDX), atomic force (AFM) as well Raman spectroscopy.Assays performed in six different time (t 6, 12, 24, 36, 48 72 h) at 320 °C.After...
Hydrocarbons present in saturated fractions of crude oils can be assessed by atmospheric pressure chemical ionization (APCI) using small hydrocarbons as ionizing reagents a Fourier transform ion cyclotron resonance mass spectrometer (FT-ICR MS).In this work, five paraffin standards different average molar distributions (M w ) were easily ionized APCI(+)FT-ICR MS isooctane the reagent gas.Data M , carbon number and double bond equivalent (DBE) corresponding to linear cyclic (HCs) compared...
Este estudo apresenta os dados estatísticos de acidentes do trabalho nas atividades envolvendo a produção floresta plantada no Brasil e descreve seus
Corrosion processes were evaluated for AISI 316 and 1020 steels by scanning electron microscopy (SEM), atomic force (AFM) light microscopy.Coupons immersed in four crude oil samples with different total acid numbers (TANs) 48 days at room temperature.The also exposed to three blends (B1-B3), produced quaternary mixtures of the oils, lower TANs than their respective original oils.SEM micrographs showed pitting-type corrosion most cases.AFM imaging drastic changes peak-to-peak values,...
TECHNIQUES.It has been recurring adulterations in fuels (such as gasoline, ethanol and diesel), being necessary the exploration of use more modern analytical techniques capable controlling quality these fuels, since some regulated tests may be inefficient to detect adulteration.Among them, it is highlighted proton nuclear magnetic resonance ( 1 H NMR) spectroscopy, portable near infrared spectroscopy (microNIR).In this work, was studied conformities 115 samples seized (76 23 ethanol, 16...
Dentre os desafios da extração e caracterização de ARN a partir sua matriz complexa, propomos o emprego uma nova metodologia análise para identificação dessas espécies em amostras petróleo. Tal metodologia, baseia-se numa abordagem não convencional utilização ESI(-)FT-ICR MS, através dopagem amostra com ácido fórmico transformação dos sais forma mono ou dicarregada. Por outro lado, aplicação bem-sucedida do FT-ICR MS petroleômica depende métodos processamento dados. No presente estudo foram...
Atividades de limpeza prédios retratam um segmento com significativo número acidentes, reduzida qualificação, desvalorização e precária terceirização. Entrevistamos sessenta trabalhadores que atuam na em uma escola técnica Vitória/ES, o objetivo identificar perfil dos trabalhadores, os riscos presentes no ambiente escolar, além índices acidente disponíveis pelo governo. O resultado indicou baixa formação falta treinamento, entre outros. Os identificados foram: acidente, biológico ergonômico....