A5101865338- Catalytic Processes in Materials Science
- Catalysis and Hydrodesulfurization Studies
- Catalysis for Biomass Conversion
- Catalysts for Methane Reforming
- Nanomaterials for catalytic reactions
- Catalysis and Oxidation Reactions
- Lignin and Wood Chemistry
- Higher Education Governance and Development
- Carbon dioxide utilization in catalysis
- Social Sciences and Policies
- Higher Education Research Studies
- Characterization and Applications of Magnetic Nanoparticles
- CO2 Reduction Techniques and Catalysts
- Electrocatalysts for Energy Conversion
- Minerals Flotation and Separation Techniques
- Hybrid Renewable Energy Systems
- Thermochemical Biomass Conversion Processes
- Asymmetric Hydrogenation and Catalysis
- Hydrogen Storage and Materials
- Education Systems and Policy
- Educational Outcomes and Influences
- Developmental and Educational Neuropsychology
- Metal Extraction and Bioleaching
- Latin American Urban Studies
- Radio, Podcasts, and Digital Media
Universidad de Sevilla
2016-2023
Instituto de Ciencia de Materiales de Sevilla
2016-2023
King Abdullah University of Science and Technology
2023
Åbo Akademi University
2019-2022
KU Leuven
2022
Universidade da Madeira
2018
Universidade Federal de Goiás
2008-2010
Universidade Nova de Lisboa
2008
Rede de Química e Tecnologia
2008
The reaction mechanism of the reverse water–gas shift (RWGS) was investigated using two commercial gold-based catalysts supported on Al2O3 and TiO2. surface species formed during mechanisms were elucidated by transient steady-state operando DRIFTS studies. It revealed that RWGS over Au/Al2O3 proceeds through formation formate intermediates are reduced to CO. In case Au/TiO2 catalyst, goes a redox with suggested hydroxycarbonyl intermediates, which further decompose CO water. Ti3+ species,...
Carbon formation and sintering remain the main culprits regarding catalyst deactivation in dry bi-reforming of methane reactions (DRM BRM, respectively). Nickel based catalysts (10 wt.%) supported on alumina (Al2O3) have shown no exception this study, but can be improved by addition tin ceria. The effect two different Sn loadings base been examined for DRM reaction over 20 h, before selecting most appropriate Sn/Ni ratio promoting with wt.% CeO2. This then underwent activity measurements a...
The dry reforming of methane with CO2 is a common route to transform CO2/CH4 mixtures into added value syngas. Ni based catalysts are highly active for this goal but suffer from deactivation, as such promoters need be introduced counteract this, and improve performance. In study, mono- bi-metallic formulations on 10 wt.% Ni/CeO2-Al2O3 explored compared reference Ni/γ-Al2O3. effect Sn Pt was also investigated. formulation promoted looked especially promising, showing conversions stabilising...
Abstract An innovative route for bio‐compounds upgrading via “hydrogen‐free” hydrodeoxygenation (HDO) is proposed and evaluated using guaiacol as a model compound in high‐pressure batch reactor. Experimental results showed that noble metal supported on activated carbon catalysts are able to conduct tandem multiple steps including water splitting subsequent HDO. The activity of Ru/C catalyst superior other studied ( i. e . Au/C, Pd/C Rh/C) our water‐only HDO reaction system. greater...
This work is a detailed study on how to optimize gold colloids preparation and their deposition very different in nature carbon materials. The change of the continuous phase its dielectric constant used assure good dispersion hydrophilic/hydrophobic carbons successful transfer preformed small size surface. sintering behavior particles during calcination step also studied optimal conditions reduce minimum particle increase protecting agent removal are found. as prepared catalysts have been...
The field dependence of the optical transmission tartrate-coated and polyaspartate-coated magnetite-based aqueous colloids was studied. colloidal stock samples were diluted to prepare a series containing different particle volume fractions ranging from 0.17% up 1.52% measured at distinct times after preparation (1, 30, 120, 240, 1460 days). We show that magneto-transmissivity behavior is mainly described by rotation linear chains, low-field range, whereas analysis data provided measurement...
Biochar-based Pt catalysts, unpromoted and Na-promoted, were prepared by an incipient wetness impregnation method characterised Inductively coupled plasma mass spoectrometry (ICP-MS) analysis, X-ray diffraction, N2 adsorption transmission, scanning electron microscopy. It was demonstrated that a sodium promoter modifies the acid-base properties of support, altering Pt-support interaction. An operando Diffuse reflectance infrared fourier transform spectroscopy-mass spectrometry (DRIFTS-MS)...
Biofuels upgrading gathering momentum in view of the gradual depletion fossil fuels and pursuit renewable energy sources to mitigate global warming. Hydrodeoxygenation (HDO) is a key reaction bio-oil produce hydrocarbon or high-value chemicals. Oxygen removal increases its calorific value, improve thermal chemical stability, reduce corrosiveness, etc., making upgraded suitable as fuel blending fuel. However, dependence on high-pressure hydrogen serious disadvantage, it an expensive resource...
Magnetoliposomes consist of vesicles composed a phospholipid membrane encapsulating magnetic nanoparticles. These systems have several important applications, such as in MRI contrast agents, drug and gene carriers, cancer treatment devices. For all these controlling the number encapsulated nanoparticles is key issue. In this work, we used magneto-optical technique to obtain information about efficiency encapsulation, per liposome also formation nanoparticle structures. The parameters studied...
Today's rising energy costs, coupled with increasing demand, make it necessary to search for more efficient processes.
Resource Allocation in Public Research Universities José L. Santos A study of internal resource allocation public I universities is particularly timely and important as the patterns expenditures revenues at universities, after a period substantial change, stabilized 1999. After 1999, new retrenchments ensued result intensified budget cutting that, some cases, resulted rescissions for fiscal years 2001–2002 2002–2003. An analysis revenue streams institutions higher education over 15 from 1985...
The current work focuses on studying the aqueous phase reforming (APR) of pine and birch hydrolysate obtained from waste wood by using organic acids available biorefineries. Processing representative synthetic mixtures was utilized in order to support data interpretation related influence different chemical compound processing parameters APR actual hydrolysates. It shown, that hydrogenation hydrolysates prior not feasible presence formic acid, which ruled out one potential route. However, it...
Development of novel biomaterials and its practical application have been the subject much research in field scaffolds for tissue engineering, providing success producing that facilitate growth provide structure support cells.Due to biocompatibility biodegradability, chitosan has focus several researches recent years be applied biomedical chemical modifications through crosslinks can produce materials with a wide variety properties.The objective this study was obtain characterize, chemically...
Clean hydrogen production via WGS is a key step in the development of fuel processors. Herein, we have designed new family highly effective catalysts for low-temperature reaction based on gold modified copper-zinc mixed oxides. Their performance was controlled by catalysts' composition and Au-Cu synergy. The utilization hydrotalcite precursors leads to an optimal microstructure that ensures excellent Au Cu dispersion favors their strong interaction. From application perspective these...