A5026698339- Catalysis and Hydrodesulfurization Studies
- Petroleum Processing and Analysis
- Polyoxometalates: Synthesis and Applications
- Urological Disorders and Treatments
- Ionic liquids properties and applications
- Hydrocarbon exploration and reservoir analysis
- Chemical Synthesis and Reactions
- Nanomaterials for catalytic reactions
- Asphalt Pavement Performance Evaluation
- Spectroscopy and Chemometric Analyses
- Extraction and Separation Processes
- Diverticular Disease and Complications
- Infectious Disease Case Reports and Treatments
- Urinary and Genital Oncology Studies
- Catalysis and Oxidation Reactions
- Neuroendocrine Tumor Research Advances
- Adrenal and Paraganglionic Tumors
- SARS-CoV-2 detection and testing
- Diagnosis and treatment of tuberculosis
- Metal-Organic Frameworks: Synthesis and Applications
- Neuroblastoma Research and Treatments
- Ureteral procedures and complications
- Pediatric Urology and Nephrology Studies
- Biodiesel Production and Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
Universidade Federal de Minas Gerais
2024
Universidade Federal do Tocantins
2021
Hospital Braga
2020-2021
University of Aveiro
2011-2019
Energias de Portugal (Portugal)
2016-2017
Hospital de São Marcos
2005-2010
Universidade do Porto
1992
Many separation processes in petrochemical and refining industries are applied to close boiling point compounds and/or azeotropic mixtures which make difficult the application of simple distillation, requiring alternative processes. Ionic liquids, with their unique tunable properties, may constitute an advantageous as extractive solvents that involve hydrocarbon systems. In this work, a review on experimental data available for ternary systems composed ionic liquids hydrocarbons is reported....
Ionic liquids (ILs), with their unique and tunable properties, are attracting the interest of both academia refining companies as potential solvents for extraction specific compounds from hydrocarbons' streams. For such a purpose, knowledge mutual solubilities between ionic hydrocarbons is required. Experimental measurements all these systems impracticable due to large number possible combinations hydrocarbons. Thus, deeper understanding interactions taking place, ruling phase behavior,...
The porous metal-organic framework UiO-66(Zr) obtained via non modulated synthesis, has revealed to be a notable heterogeneous catalyst, enabling extremely fast and very efficient desulfurization of multicomponent model diesel also real fuel.
The zinc‐substituted polyoxotungstate [PW 11 Zn(H 2 O)O 39 ] 5– (PW Zn) has been encapsulated within the aluminium(III) 2‐aminoterephthalate NH ‐MIL‐101(Al) metal–organic framework (MOF) either directly through a one‐pot microwave‐assisted synthesis or by an impregnation method. resultant composite materials were characterized elemental analysis, powder X‐ray diffraction, FTIR spectroscopy, and 31 P magic‐angle spinning (MAS) NMR spectroscopy. desulfurization of model diesel containing three...
Over the recent years, bitumen modification with polymers, acids, or mineral fillers has gained relevance to adjust its performance properties. This work reports use of polyphosphoric acid (PPA) for formulated bitumen. With this objective, an in-depth literature review on PPA was firstly performed. Subsequently, five individual refinery components were selected preparation blends, namely, asphaltic residue, vacuum and three lube oils extracts. Seven binary/ternary blends prepared then...
The oxidative desulfurization of model and real diesel has been studied using the complex [MoO2Cl2(4,4'-di-tert-butyl-2,2'-bipyridine)] as (pre)catalyst, aq. H2O2 oxidant, an ionic liquid extraction solvent. Under moderate conditions (50 °C) short reaction times (<3 h), dibenzothiophene, 4-methyldibenzothiophene 4,6-dimethyldibenzothiophene could be completely removed from diesel. (pre)catalyst 1 was transformed in situ to active catalyst [MoO(O2)2(di-tBu-bipy)]. By sequentially performing...
This work proposes an efficient desulfurization system to produce low sulfur diesel under sustainable and moderate experimental conditions. Treatment of a real with content 2300 ppm led 80% after 2 h. The processes used conciliate liquid-liquid extraction oxidative catalysis. catalytic performance the commercial Keggin-polyoxomolybdate H3[PMo12O40] (PMo12) was strategically increased by simple cation exchange, using long carbon chain (ODAPMo12, ODA = CH3(CH2)17(CH3)3N), its incorporation...
Bio-oil resulting from biodiesel production, currently used for energetic valorisation, can be added to the bitumen, producing a bio-bitumen and acting as bitumen extender by reducing its viscosity. Thus, this paper analyzes feasibility of using bio-oil create bio-bitumen. Two base were used, namely, 0/10 35/50 pen combined with production content up 10%. Bio-bitumen characterisation evaluated chemical, physical mechanical properties asphalt mixtures Models prediction developed. The results...
The complexes [MoO2Cl2(DMB)2] (1) and [MoO2Cl2(DEO)] (2) (DMB = N,N-dimethylbenzamide, DEO N,N′-diethyloxamide) have been evaluated as catalysts in extractive-catalytic oxidative desulfurization (ECOD) of a simulated diesel fuel. Using the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM]PF6) extraction solvent H2O2 oxidant, ultra-deep (S-content from 3000 ppm to <10 ppm) was possible within reaction time 1–3 h, systems Catalyst/[BMIM]PF6 could be recycled for five times...
Regulations on the permissible levels of sulfur in transportation fuels are becoming ever more strict, with a global shift towards “zero sulfur” fuels, and revamp existing hydrodesulfurization (HDS) facilities to meet these lower caps is cost‐prohibitive. Metal‐catalyzed sulfoxidation chemistry viewed as an economically viable desulfurization strategy that could complement conventional HDS technology. In present work, complex [ η 5 ‐IndMo(CO) 3 Me] ( 1 ) (Ind = indenyl) was employed...
The Keggin phosphotungstate (PW12) and its zinc derivative (PW11Zn) were tested as oxidative catalysts for desulfurization processes using simulated real diesels. These compounds used homogeneous catalysts, while the corresponding SBA-15 composites heterogeneous catalysts. comparison of their catalytic performance demonstrated that zinc-substituted polyoxometalate is more efficient than plenary PW12 structure. Additionally, PW11Zn@aptesSBA-15, sustainability efficiency was largely improved,...