Search Results - "Brito, Joaquín L"

Surface Recognition Directed Selective Removal of Dyes from Aqueous Solution on Hydrophilic Functionalized Petroleum Coke Sorbents. A Supramolecular Perspective by Trujillo, Pablo, González, Teresa, Brito, Joaquín L, Briceño, Alexander

“…Novel controlled hydrophilic nonporous carbon-based sorbents from petroleum coke were obtained by using a hydrothermal oxidation treatment of shot coke with…”
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The Carburization of Transition Metal Molybdates (MxMoO4, M = Cu, Ni or Co) and the Generation of Highly Active Metal/Carbide Catalysts for CO2 Hydrogenation by Xu, Wenqian, Ramírez, Pedro J., Stacchiola, Dario, Brito, Joaquín L., Rodriguez, José A.

“…A new approach has been tested for the preparation of metal/Mo 2 C catalysts using mixed-metal oxide molybdates as precursors. Synchrotron-based in situ…”
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Mesoporous catalysts based on Keggin-type heteropolyacids supported on MCM-41 and their application in thiophene hydrodesulfurization by Méndez, Franklin J., Llanos, Aura, Echeverría, Marcel, Jáuregui, Reynaldo, Villasana, Yanet, Díaz, Yraida, Liendo-Polanco, Gustavo, Ramos-García, Miguel A., Zoltan, Tamara, Brito, Joaquín L.

“…[Display omitted] ► Supporting the heteropolyacids increased the catalytic activities. ► Surface acidity and calcination temperature related to HDS activity…”
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Pollutant reduction and catalytic upgrading of a Venezuelan extra-heavy crude oil with Al2O3-supported NiW catalysts: Effect of carburization, nitridation and sulfurization by Villasana, Yanet, Méndez, Franklin J., Luis-Luis, Miguel, Brito, Joaquín L.

“…•Catalysts with (Ni/(Ni + W) = 0.50 had the highest activity in thiophene HDS.•NiW carbide and nitride has potential for pollutant reduction in an extra-heavy…”
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Dealumination and Characterization of Natural Mordenite-Rich Tuffs by Adriano, Armando, Cornejo, Mauricio H., Baykara, Haci, Ludeña, Eduardo V., Brito, Joaquín L.

“…The present study evaluates the feasibility of partially dealuminated natural mordenite as a catalyst support by studying improvement in its textural…”
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Adsorption properties of novel layered titanium phosphate prepared from mesoporous titania by sol–gel processing by Carvajal, María E., Brito, Joaquín L., Bastardo-González, Ernesto, Méndez, Franklin J.

“…A mesoporous titania material with a single X-ray diffraction signal at small-angle and anatase TiO 2 walls was prepared by a sol–gel method using…”
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Synthesis of La0.8Sr0.2FeO3 perovskites nanocrystals by Pechini sol–gel method by Del Toro, Raquel, Hernández, Petra, Díaz, Yraida, Brito, Joaquín L.

“…Pechini sol–gel method has been employed for the preparation of nanocrystalline La0.8Sr0.2FeO3 perovskite. The synthesis procedure was optimized by varying the…”
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Modeling the interaction of molybdenum species adsorbed on a pyrolytic graphite platform and correlations with XPS spectra at different ETAAS stages by Ruiz, Frine, Brito, Joaquín L., Griffe, Beulah, Benzo, Zully, Ruette, Fernando

“…•DFT calculated interactions of Mo species on a pyrolytic graphite platform.•Calculations shed some lights on Mo adsorbed species during the ETAAS…”
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Selective hydrogenation of 1,3-butadiene in the presence of 1-butene under liquid phase conditions using structured catalysts by Méndez, Franklin J., Sanz, Oihane, Montes, Mario, Guerra, Julia, Olivera-Fuentes, Claudio, Curbelo, Susana, Brito, Joaquín L.

“…[Display omitted] •1,3-butadiene hydrogenation performance on structured substrate have been studied.•Foams present better performance than monoliths due to…”
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Titanium-modified MCM-41 molecular sieves as efficient supports to increase the hydrogenation abilities of NiMoS and CoMoS catalysts by Méndez, Franklin J., Vargas, Roylena, Blanco, Joel, Rojas-Challa, Yahsé, Bastardo-González, Ernesto, García-Macedo, Jorge A., Puello-Polo, Esneyder, Brito, Joaquín L.

“…[Display omitted] •Ti modified samples induced better-dispersed catalysts.•HDS rates improved with Ti incorporation compared with the analog Ti free…”
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Atomic ratio effect on catalytic performance of FeW-based carbides and nitrides on thiophene hydrodesulfurization by Villasana, Yanet, Ruscio-Vanalesti, Franca, Pfaff, Carolina, Méndez, Franklin J., Luis-Luis, Miguel Ángel, Brito, Joaquín L.

“…[Display omitted] ► New catalysts for HDS of thiophene based on FeW carbides and nitrides. ► Alumina-supported FeW carbides and nitrides are synthesized by TPR…”
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Effect of the activation process on thiophene hydrodesulfurization activity of activated carbon-supported bimetallic carbides by Puello-Polo, Esneyder, Brito, Joaquín L.

“…The effect of passivation and presulfidation after carbiding of activated carbon-supported Fe–Mo, Co–Mo and Ni–Mo catalysts on their thiophene HDS activity was…”
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Metallic monoliths of AISI 304 stainless steel, aluminum, FeCrAlloy® and brass, coated by Mo and W oxides for thiophene hydrodesulfurization by Diaz, Yraida, Sevilla, Adriana, Mónaco, Andrea, Méndez, Franklin J., Rosales, Pedro, García, Luis, Brito, Joaquín L.

“…Metal sheets of AISI 304 stainless steel, aluminum, FeCrAlloy® and brass were employed in the manufacture of metallic monoliths to provide a support for…”
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NiMo/MCM-41 Catalysts for the Hydrotreatment of Polychlorinated Biphenyls by Méndez, Franklin J., Bastardo-González, Ernesto, Betancourt, Paulino, Paiva, Luis, Brito, Joaquín L.

“…MCM-41 type mesoporous materials of pure silicon and aluminosilicates (with Si/Al atomic ratios of 20 and 40) were prepared by a facile synthesis method and…”
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Relationship Between Sulfidation and HDS Catalytic Activity of Activated Carbon Supported Mo, Fe-Mo, Co-Mo and Ni-Mo Carbides by Puello-Polo, Esneyder, Gutiérrez-Alejandre, Aída, González, Gema, Brito, Joaquín L

“…Temperature-programmed sulfiding (TPS) and temperature-programmed reduction of the sulfided catalysts (TPR-S) have been employed to evaluate Mo, Fe-Mo, Co-Mo…”
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Synthesis and characterization of alumina-coated aluminum sponges manufactured by sintering and dissolution process as possible structured reactors by Méndez, Franklin J., Rivero-Prince, Sayidh, Escalante, Yelisbeth, Villasana, Yanet, Brito, Joaquín L.

“…Al2O3–Al sponges were manufactured by sintering and dissolution process with the aim of using these materials as structured catalytic reactors. For this…”
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Electron paramagnetic resonance study of electronic changes of vanadium in poisoned hydrodesulfurization catalysts submitted to oxidation, carbiding and nitriding processes by Pinto-Castilla, Susana, Moronta, Delfín, Figueroa, Daniel, Rodríguez, Josmir, Del Toro, Raquel S., Betancourt-Figueroa, Paulino J., Brito, Joaquín L.

“…Changes in the oxidation state and chemical environment of vanadium in poisoned and regenerated hydrotreatment (HDT) catalyst were followed by electron…”
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Theoretical study of Au/SAPO-11 catalyst and its potential use in thiophene HDS by Griffe, Beulah, Brito, Joaquín L., Sierraalta, Anibal

“…Quantum chemistry calculations were carried out, using ONIOM2 methodology, in order to investigate the thiophene interaction with Au/SAPO-11 catalysts and…”
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Influence of toluene on the catalytic activity of NiPdCe catalyst for selective hydrogenation of 1,3-butadiene by Lozano, Luís, Brito, Joaquín L., Olivera, Claudio, Guerra, Julia, Curbelo, Susana

“…► Conversion of BD increases with toluene addition. ► Conversion of BD increases with higher pressure. ► Toluene addition enhances 2BE/1BE selectivity and…”
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Preparation of functionalized porous nano-γ-Al2O3 powders employing colophony extract by Sifontes, Ángela B., Gutierrez, Brenda, Mónaco, Andrea, Yanez, Andreina, Díaz, Yraida, Méndez, Franklin J., Llovera, Ligia, Cañizales, Edgar, Brito, Joaquín L.

“…This study reports the synthesis of porous nano alumina employing carboxylato-alumoxanes [Al(O) x (OH) y (O 2 CR) z ] n as precursors for controlling the pore…”
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