Search Results - "Órfão, José J.M."

Carbon supported Ru-Ni bimetallic catalysts for the enhanced one-pot conversion of cellulose to sorbitol by Ribeiro, Lucília S., Delgado, Juan J., Órfão, José J.M., Pereira, M. Fernando R.

“…[Display omitted] •Ru-based catalysts showed to be highly efficient for the conversion of cellulose.•A synergic effect between Ru and Ni was…”
Get full text

Cooperative action of heteropolyacids and carbon supported Ru catalysts for the conversion of cellulose by Almohalla, María, Rodríguez-Ramos, Inmaculada, Ribeiro, Lucília S., Órfão, José J.M., Pereira, Manuel Fernando R., Guerrero-Ruiz, Antonio

“…[Display omitted] •Carbon supported bifunctional catalysts with a metallic function (Ru) combined with heteropolyacids were synthesized.•Efficient performance…”
Get full text

Production, characterization and application of activated carbon from brewer’s spent grain lignin by Mussatto, Solange I., Fernandes, Marcela, Rocha, George J.M., Órfão, José J.M., Teixeira, José A., Roberto, Inês C.

“…Different types of activated carbon were prepared by chemical activation of brewer’s spent grain (BSG) lignin using H 3PO 4 at various acid/lignin ratios (1,…”
Get full text

Influence of activated carbon surface chemistry on the activity of Au/AC catalysts in glycerol oxidation by Rodrigues, Elodie G., Pereira, Manuel F.R., Chen, Xiaowei, Delgado, Juan J., Órfão, José J.M.

“…The oxygen content of activated carbon surface plays a key role on the activity of Au/AC catalysts for the oxidation of glycerol. Oxygen-free supports promote…”
Get full text

Gold supported on carbon nanotubes for the selective oxidation of glycerol by Rodrigues, Elodie G., Carabineiro, Sónia A.C., Delgado, Juan J., Chen, X., Pereira, Manuel F.R., Órfão, José J.M.

“…A remarkable high selectivity to dihydroxyacetone combined with a high activity is obtained in the glycerol oxidation over Au/MWCNT catalysts, particularly if…”
Get full text

Adsorption of dyes on activated carbons: influence of surface chemical groups by Pereira, Manuel Fernando R, Soares, Samanta F, Órfão, José J.M, Figueiredo, José L

“…The surface chemistry of a commercial activated carbon has been selectively modified, without changing significantly its textural properties, by means of…”
Get full text

Ozonation of textile effluents and dye solutions under continuous operation: Influence of operating parameters by Soares, Olívia Salomé G.P., Órfão, José J.M., Portela, Dionísia, Vieira, António, Pereira, Manuel Fernando R.

“…Ozonation experiments were carried out under continuous operation in a bubble column. The effect of several parameters (inlet dye concentration, applied ozone…”
Get full text

Screening of catalysts and reaction conditions for the direct conversion of corncob xylan to xylitol by Ribeiro Lucília S., Órfão José J.M., Pereira Manuel F.R.

“…Different supported metal catalysts were tested for the one-pot transformation of corncob xylan to xylitol. The influence of several factors, such as catalytic…”
Get full text

Comparative study of different catalysts for the direct conversion of cellulose to sorbitol by Ribeiro Lucília S., Órfão José J.M., Pereira Manuel Fernando R.

“…The catalytic conversion of lignocellulosic biomass to obtain high added value compounds and fuels is a rapidly developing field. Given the abundance of this…”
Get full text

Catalytic ozonation of sulphamethoxazole in the presence of carbon materials: Catalytic performance and reaction pathways by Gonçalves, Alexandra G., Órfão, José J.M., Pereira, Manuel Fernando R.

“…[Display omitted] ► MWCNTs and activated carbon were tested in ozonation of sulphamethoxazole (SMX). ► MWCNTs present higher catalytic performance than…”
Get full text

Oxidation of CO, ethanol and toluene over TiO2 supported noble metal catalysts by Santos, Vera P., Carabineiro, Sónia A.C., Tavares, Pedro B., Pereira, Manuel F.R., Órfão, José J.M., Figueiredo, José L.

“…Specific activity at 285°C in VOC oxidation as a function of oxygen dissociative chemisorption energies on metals. [Display omitted] ▶ The Au/TiO2 catalyst…”
Get full text

The role of multiwalled carbon nanotubes (MWCNTs) in the catalytic ozonation of atrazine by Fan, Xiaolei, Restivo, João, Órfão, José J.M., Pereira, Manuel Fernando R., Lapkin, Alexei A.

“…•A new reaction pathway for conversion of atrazine in catalytic ozonation is proposed.•A lower toxicity effluent is obtained compared to non-catalytic route.•A…”
Get full text

Synergistic effect of bimetallic Au-Pd supported on ceria-zirconia mixed oxide catalysts for selective oxidation of glycerol by Olmos, Carol M., Chinchilla, Lidia E., Rodrigues, Elodie G., Delgado, Juan J., Hungría, Ana B., Blanco, Ginesa, Pereira, Manuel F.R., Órfão, José J.M., Calvino, Jose J., Chen, Xiaowei

“…[Display omitted] •Synergistic effect of Au and Pd on ceria-zirconia for glycerol oxidation.•Catalytic activity increases with increasing of Au:Pd…”
Get full text

Different methodologies for synthesis of nitrogen doped carbon nanotubes and their use in catalytic wet air oxidation by Rocha, Raquel P., G.P. Soares, O. Salomé, Gonçalves, Alexandra G., Órfão, José J.M., Pereira, M. Fernando R., Figueiredo, José L.

“…[Display omitted] •Solvent-free method to prepare N-CNTs by mixing CNTs in a ball mill with a N-precursor followed by thermal treatments or ammonia flow.•Study…”
Get full text

Pd, Pt, and Pt–Cu Catalysts Supported on Carbon Nanotube (CNT) for the Selective Oxidation of Glycerol in Alkaline and Base-Free Conditions by Ribeiro, Lucília S, Rodrigues, Elodie G, Delgado, Juan J, Chen, Xiaowei, Pereira, M. Fernando R, Órfão, José J. M

“…The liquid-phase oxidation of glycerol was studied to obtain value-added oxidation products such as dihydroxyacetone or glyceric acid. The effect of the…”
Get full text

Ozonation of bezafibrate promoted by carbon materials by Gonçalves, Alexandra, Órfão, José J.M., Pereira, Manuel Fernando R.

“…•MWCNTs and activated carbon (AC) were tested in ozonation of bezafibrate (BZF).•MWCNTs present higher catalytic performance than activated carbons for BZF…”
Get full text

Mono and bimetallic NaY catalysts with high performance in nitrate reduction in water by Soares, Olívia S.G.P., Marques, Luísa, Freitas, Cátia M.A.S., Fonseca, António M., Parpot, Pier, Órfão, José J.M., Pereira, Manuel F.R., Neves, Isabel C.

“…[Display omitted] •Reduction of nitrate in water was investigated with mono and bimetallic/NaY.•Catalytic tests were carried at room temperature and…”
Get full text

Ozonation of erythromycin over carbon materials and ceria dispersed on carbon materials by Gonçalves, Alexandra G., Órfão, José J.M., Pereira, Manuel Fernando R.

“…•MWCNTs and activated carbon containing ceria dispersed on the surface were prepared.•These materials were tested as catalysts in the ozonation of…”
Get full text

Adsorption of simple aromatic compounds on activated carbons by Villacañas, Francisco, Pereira, Manuel Fernando R., Órfão, José J.M., Figueiredo, José L.

“…The adsorption of model aromatic compounds (phenol, aniline, nitrobenzene) on modified activated carbons has been investigated. Electrostatic and dispersive…”
Get full text

Nitrate reduction in water catalysed by Pd–Cu on different supports by Soares, Olívia Salomé G.P., Órfão, José J.M., Pereira, Manuel Fernando R.

“…Screening tests were carried out in order to study the influence of the support in the performance of Pd monometallic and Pd–Cu bimetallic catalysts for the…”
Get full text