A5053702824- Catalysis for Biomass Conversion
- Mesoporous Materials and Catalysis
- Supercapacitor Materials and Fabrication
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Catalysis and Hydrodesulfurization Studies
- Biofuel production and bioconversion
- Lignin and Wood Chemistry
- Surfactants and Colloidal Systems
- Chemical Synthesis and Reactions
- Zeolite Catalysis and Synthesis
- Drug Solubulity and Delivery Systems
- Polyoxometalates: Synthesis and Applications
- Analytical Chemistry and Chromatography
- Biodiesel Production and Applications
- Ionic liquids properties and applications
- Spectroscopy and Quantum Chemical Studies
- Ferrocene Chemistry and Applications
- Organometallic Complex Synthesis and Catalysis
- Maternal and Neonatal Healthcare
- Synthesis and characterization of novel inorganic/organometallic compounds
- Inorganic Fluorides and Related Compounds
- Thermochemical Biomass Conversion Processes
- Organoboron and organosilicon chemistry
- NMR spectroscopy and applications
Instituto de Pesquisas Tecnológicas
2025
Imperial College London
2016-2019
Transnational Press London
2017-2018
Kensington Health
2017
University of Aveiro
2005-2016
Institut Català d'Investigació Química
2015
University Gama Filho
2012
Universidade Católica de Brasília
2012
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2008
CEA Paris-Saclay
2008
In biomass conversion, Nb2O5 has attracted increasing attention as a catalyst support presenting water-tolerant Lewis acid sites. Herein, we address the design of Ni/Nb2O5 catalysts for hydrotreating lignin to hydrocarbons. To optimize balance between acidic and hydrogenating properties, were first evaluated in diphenyl ether. The best candidate was further explored conversion oil obtained by catalytic upstream biorefining poplar. As primary products, cycloalkanes obtained, demonstrating...
Mesoporous aluminosilicates of the type Al-TUD-1, prepared via "green", low-cost, non-surfactant templating routes, are effective and versatile heterogeneous acid catalysts for production useful bio-based furanic ethers levulinate esters, reactions biorenewable substrates 5-hydroxymethyl-2-furfural (Hmf) or furfuryl alcohol (FA) with aliphatic alcohols. The identification reaction intermediates products by comprehensive two-dimensional gas chromatography combined time-of-flight mass...
Hydrothermal reactions between rare-earth (RE) chloride salts and N-(carboxymethyl)iminodi(methylphosphonic acid) (H5cmp) led to the isolation of a series layered networks formulated as [RE(H2cmp)(H2O)] [RE3+ = Y3+, La3+, Pr3+, Nd3+, Sm3+, Eu3+, Gd3+, Tb3+, Dy3+, Ho3+ Er3+]. All compounds were isolated micro-crystalline powders (many which nano-sized in thickness), with plate-like crystallites found exhibit preferential growth perpendicular [002] vector, feature seems favour catalytic...
The one-pot acid-catalysed conversion of mono/di/polysaccharides (inulin, xylan, cellobiose, sucrose, glucose, fructose, xylose) into 2-furfuraldehyde (FUR) or 5-hydroxymethylfurfural (HMF) in the presence aluminium-containing mesoporous TUD-1 (denoted as Al-TUD-1, Si/Al = 21), at 170 ºC was investigated. Xylose gave 60% FUR yield after 6 h reaction; hexose-based mono/disaccharides less than 20% HMF yield; polysaccharides 20 wt % yields h. For four consecutive batches xylose reaction...
Abstract One of the measures associated with socio‐political and environmental protection policies towards sustainability is use biomass as a renewable source energy, fuels, chemical products. The valorization carbohydrate biomass, in particular, acid‐catalyzed conversion saccharides into furanic aldehydes, furfural 5‐hydroxymethyl‐2‐furfuraldehyde, has been matter intensive research. These products possess wide application profiles different sectors industry are thus considered important...
Two-stage process for DHMTHF production from HMF through continuous-flow.
Abstract For the utilization of each lignin fraction in liquors, development separation strategies to fractionate streams by molecular weight ranges constitutes a timely challenge be tackled. Herein, membrane filtration was applied refining obtained from lignin‐first biorefining process based on H‐transfer reactions catalyzed Raney Ni, using 2‐PrOH as part extraction liquor and an H‐donor. A two‐stage cascade considered separate concentrate monophenol‐rich liquor. Building results, economic...
Sewage sludge, an abundant and problematic organic waste, was successfully converted into sustainable jet fuel range hydrocarbons (C8-C16). sludge pre-conditioned processed through a Thermo-Catalytic Reforming (TCR) system (2 Kg/h) at 450 ºC pyrolysis 700 post-reforming temperature to produce biocrude oil. The bio-crude oil subsequently conditioned upgraded via consecutive two-step hydroprocessing, comprising hydrodeoxygenation hydrocracking as two separate unit operations. hydroprocessing...
Ceramic detachments in cladding systems are indicative of adhesion loss between the ceramic tiles and substrate or its adhesive mortar due to inadequate quality workmanship, that material, whether acting simultaneously not. The shear stresses resulting from tiles’ expansion humidity accelerate this process. There is a shortage studies on mortars. This study conducted elemental, physical microstructural characterization tests mortars showed detachment up two years after being laid. At first...
Resumo
Titanium dioxide was selectively grown on reduced graphene oxide (TiO2/RGO) and carbon black (TiO2/CB) by a microwave-assisted synthesis in benzyl alcohol to produce nanocomposite catalysts (consisting of 8–9 nm anatase nanoparticles dispersed the surface) with interesting properties for production furfural from renewable carbohydrate biomass. The materials efficiently catalyze aqueous-phase dehydration xylose into at 170 °C high yields (67–69%) conversions (95–97%). catalytic performance...