Diana Julião

Diana Julião
Vasco da Gama CoLAB - Energy Storage

PhD

About

27
Publications
5,242
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740
Citations
Introduction
Diana completed her PhD in the area of homogeneous catalysis and desulfurization of fuels. In the last years, she has been developing her expertise in the preparation and catalytic application of various polyoxometalates and coordination metal compounds in different oxidative systems, but mainly in oxidative desulfurization technology. Currently she is working in VG CoLAB developing electrolytes and electrodes for energy storage technologies.
Additional affiliations
October 2019 - December 2020
University of Porto
Position
  • Researcher
December 2013 - December 2014
University of Porto
Position
  • Research Associate
Education
January 2015 - December 2018
University of Aveiro
Field of study
  • Sustainable Chemistry
September 2011 - October 2013
University of Porto
Field of study
  • Chemistry

Publications

Publications (27)
Article
The complexes [MoO2Me2(2,2′-bipyridine)] (5), [MoO2X2(4,4′-dimethyl-2,2′-bipyridine)] (X = Cl (2), Me (6)), [MoO2Me2(4,4′-di-tert-butyl-2,2′-bipyridine)] (7) and [MoO2X2(4,4′-dinonyl-2,2′-bipyridine)] (X = Cl (4), Me (8)) have been prepared and examined as catalysts in extractive and catalytic oxidative desulfurization (ECODS) of a simulated diesel...
Article
The creation of more sustainable and high efficient desulfurization system, capable to operate under cost-effective conditions, led to the application of peroxopolyoxometalates as active oxidative catalysts. These compounds present active peroxo groups in their structure that promote easily the oxidation of sulfur compounds in the presence of low a...
Article
Full-text available
A series of porous metal–organic frameworks (MOFs) of the UiO-66 family, namely UiO-66(Zr), UiO-66(Hf) and UiO-66(Hf)-NH2, prepared by solvothermal procedures were characterized, and their catalytic efficiency for oxidative denitrification (ODN) was investigated for the first time. Sustainable denitrogenation systems combining adsorption and oxidat...
Article
High efficiency was found for desulfurization and denitrogenation processes to treat diesel using either the hybrid material {[MoO3(2,2′‐bipy)][MoO3(H2O)]}n or the octanuclear complex [Mo8O22(OH)4(di‐t Bu‐bipy)4] (2,2′‐bipy = 2,2′‐bipyridine, di‐t Bu‐bipy = 4,4′‐di‐tert ‐butyl‐2,2′‐bipyridine)) as catalysts. These processes were employed in a singl...
Article
An unprecedented and straightforward strategy towards the activation of metal-organic frameworks UiO-66(Zr) and UiO-66(Hf) in oxidative desulfurization reactions was developed. Post-synthetic treatment of poor-defect pristine UiO-66 materials with chloride-based salts (for example TiCl4) leaded to the preparation of more active and recyclable heter...
Article
Full-text available
Regulations on the permissible levels of sulfur in transportation fuels are becoming ever more strict, with a global shift towards “zero sulfur” fuels, and the revamp of existing hydrodesulfurization (HDS) facilities to meet these lower caps is cost‐prohibitive. Metal‐catalyzed sulfoxidation chemistry is viewed as an economically viable desulfuriza...
Article
Oxidative desulfurization (ODS) is a method of removing sulfur from diesel fuel that has the potential to complement or even replace conventional hydrodesulfurization processes in oil refineries. One of the most promising variants of ODS is extractive and catalytic ODS (ECODS) in which the organic sulfur compounds in the liquid fuel are oxidized an...
Article
A novel composite has been prepared through the immobilization of the Keggin sandwich-type [Sm(PMo11O39)2]¹¹⁻ anion (SmPOM) on large-pore silica spheres previously functionalized with trimethylammonium groups (TMA). The resulting [email protected] material has been evaluated as heterogeneous catalyst in a biphasic desulfurization 1:1 diesel/extract...
Chapter
Polyoxometalates have been demonstrated to be efficient catalysts for the activation of oxidants in desulfurization processes. Successful results on desulfurization using polyoxometalates and hydrogen peroxide to desulfurize model oils and liquid fuels were reported and can be found in the literature. The desulfurization is an actual subject with n...
Article
Highly efficient, deep desulfurization of a multi-component model diesel containing benzothiophene (BT), dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT) has been achieved by using the peroxophosphomolybdate [(n-C4H9)4N]3{PO4[MoO(O2)2]4} (Q3PMo4) directly as catalyst, and aqueous H2O2 as oxidant. Q3PMo4 behaves as a heterogeneous...
Article
The complexes [MoO 2 Cl 2 (DMB) 2 ] (1) and [MoO 2 Cl 2 (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]PF 6 ) as extraction solvent a...
Article
A combination of catalytic oxidation and extraction was used for the desulfurization of a model diesel containing benzothiophene, dibenzothiophene and 4,6-dimethyldibenzothiophene, or a real diesel sample with a sulfur content of 2300 ppm. The catalysts used were the soluble peroxo compound (nBu4N)3{PO4[WO(O2)2]4} (PW4) and a supported material den...
Article
Full-text available
This work proposes an efficient desulfurization system to produce low sulfur diesel under sustainable and moderate experimental conditions. Treatment of a real diesel with a sulfur content of 2300 ppm led to 80% desulfurization after 2 h. The processes used conciliate liquid-liquid extraction and sulfur oxidative catalysis. The catalytic performanc...
Article
Full-text available
An emerging strategy to improve the performance of porous metal-organic framework (MOF) materials as heterogeneous catalysts is reported. The incorporation of the iron-substituted polyoxometalate (POM) TBA4[PW11Fe(H2O)O39] (PW11Fe) in the porous MOF NH2-MIL-101(Fe), leading to a novel composite based MOF material, PW11Fe@NH2-MIL-101(Fe), revealed t...
Article
Full-text available
This work presents a successful recycling system based in homogeneous polyoxometalate catalysts to desulfurize model and real diesels. Various Keggin-type polyoxometates entrapped in a room temperature ionic liquid (RTIL) phase were investigated. The desulfurization process here proposed conciliates efficiently an extraction and an oxidative cataly...
Article
Full-text available
The zinc-substituted polyoxotungstate [PW11Zn(H2O)O39]5– (PW11Zn) has been encapsulated within the aluminium(III) 2-aminoterephthalate NH2-MIL-101(Al) metal–organic framework (MOF) either directly through a one-pot microwave-assisted synthesis or by an impregnation method. The resultant composite materials were characterized by elemental analysis,...
Article
The present research investigation brings out a novel and relevant catalytic application for the family of MIL-101 metal-organic framework (MOF) materials. The porous Fe(III) terephthalate MOF, MIL-101(Fe) and the corresponding amino-functionalized material, NH2-MIL-101(Fe) showed to be highly active and 100% selective heterogeneous catalysts in th...
Article
Full-text available
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 as oxidant, and an ionic liquid as extraction solvent. Under moderate conditions (50 °C) and short reaction times (<3 h), dibenzothiophene, 4-methyldibenzothiophene and 4,6-dimethyldibenz...
Chapter
In the last decade, polyoxometalates have been demonstrated to be efficient catalysts for the activation of oxidants in desulfurization processes. Successful results on desulfurization using polyoxometalates and hydrogen peroxide to desulfurize model oils and liquid fuels were reported and can be found in the literature. The desulfurization is an a...
Article
Full-text available
An aluminum 2-aminoterephthalate based metal–organic framework (MOF) material was applied for the first time to prepare highly efficient heterogeneous catalysts in desulfurization processes. Sandwich-type [Eu(PW11O39)2]11− polyoxometalate (POM) was supported on Al(III) and Cr(III) MIL-type MOFs, NH2-MIL-53(Al) and MIL-101(Cr), and extensive charact...
Article
Full-text available
The first catalytic active composites based on CoAl 2 O 4 nanoparticles with different size (5.5 and 2.5 nm) were successfully prepared using a simple methodology of incorporation into MIL-101(Cr) framework, CoAl-x@MIL(Cr). Characterization of CoAl-x@MIL(Cr) composites by elemental analysis, vibrational spectroscopy (FT-IR and FT-Raman), powder X-r...
Article
Hybrid multilayer films composed of poly(ethylenimine) and sandwich-type silicotungstates, K13[Ln(SiW11O39)2] (Ln(SiW11)2), Ln3+ = Eu, Tb, Dy, were prepared on glassy carbon electrodes, quartz and glass slides using the electrostatic LbL self-assembly method. The film build up, monitored by electronic spectroscopy, showed a regular stepwise growth...

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Project
Dear Colleagues, Sulfur compounds in fuels are the main reason for acid rain and environmental pollution. The combustion of fossil fuels generates emissions of sulfur such as sulfur dioxide (SO2), which is corrosive and toxic, and as fine particulate matter of metal sulfates. In response to this, the specifications of govern transportation fuels have been increasing severely with respect to sulfur content over the years. The strict regulations imposed have required the development of novel technologies with higher cost efficiency and sustainability, adapted to a variety of different fuels, presenting distinct properties and sulfur contents. The actual desulfurization method in the world refineries, i.e., hydrodesulfurization, has been adjusted to meet the tight specifications of the current limit imposed by government directives; however, the extreme severe conditions required (high temperature, pressure, and consumption of large amounts of hydrogen) are affecting the economic viability of the process. On the other hand, the hydrodesulfurization process is unviable to treat certain types of fuels, such as heavy fuel oil. Catalytic processes can be used to improve or even replace the actual hydrodesulfurization. Therefore, this Special Issue aims to outline promising catalytic desulfurization technologies to treat fuels, designing novel cost-effective and sustainable processes. These can include biocatalysis, extractive, oxidation, adsorptive processes, etc., with viability for industrial application. Submissions are welcome in the form of original research manuscripts or critical review papers that represent the scientific field. Dr. Salete Balula Dr. Fátima Mirante Dr. Diana Julião