Search Results - "Faro, Arnaldo C"

Correlations between Dispersion, Acidity, Reducibility, and Propane Aromatization Activity of Gallium Species Supported on HZSM5 Zeolites by Rodrigues, Victor de O, Eon, Jean-Guillaume, Faro, Arnaldo C

“…Gallium-modified ZSM5 zeolites, containing 2, 3, and 4 wt % Ga, were prepared by incipient wetness impregnation with gallium(III) nitrate solutions of HZSM5…”
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Niobia-alumina as methanol dehydration component in mixed catalyst systems for dimethyl ether production from syngas by Lima, Stevie H., Forrester, Aline M.S., Amparo Palacio, Luz, Faro, Arnaldo C.

“…•Niobia-modified aluminas are better dehydration components in syngas to DME conversion.•Formates are irreversibly produced on the γ-alumina surface by…”
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Esterification of fatty acids with alcohols over niobium phosphate by Bassan, Iria A.L., Nascimento, Danielle R., San Gil, Rosane A.S., da Silva, Maria I. Pais, Moreira, Carla R., Gonzalez, Wilma A., Faro, Arnaldo C., Onfroy, Thomas, Lachter, Elizabeth R.

“…The aim of this study is the evaluation of niobium catalysts (niobic acid, niobium phosphate) in the esterification reactions of fatty acids (C12–C18) with…”
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Unsupported NiMoAl hydrotreating catalysts prepared from NiAl-terephthalate hydrotalcites exchanged with heptamolybdate by Arias, Santiago, Licea, Yordy E., Palacio, Luz Amparo, Faro, Arnaldo C.

“…•NiMoAl LDHs were prepared from NiAl-terephthalate LDHs by exchange with Mo7O246−.•Mixed oxides with up to 122m2g−1 BET area were obtained from NiMoAl…”
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Synthesis of NiAl layered double hydroxides intercalated with aliphatic dibasic anions and their exchange with heptamolybdate by Aguilera, Luis Jacobo, Palacio, Luz Amparo, Faro Jr, Arnaldo C.

“…Layered double hydroxides (LDH) of general formula Ni1-x Alx(OH)2(A)x/2. mH2O were obtained by a co-precipitation method at constant pH, using succinate…”
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In Situ X-ray Absorption Study of the Genesis and Nature of the Reduced Gallium Species in Ga/HZSM5 Catalysts by Faro, Arnaldo C, Rodrigues, Victor de O, Eon, Jean-Guillaume

“…In situ gallium K edge XAFS spectroscopy experiments were performed with GaZSM5 catalysts containing two different gallium loadings (2 and 4%) under hydrogen…”
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Niobia-modified aluminas prepared by impregnation with niobium peroxo complexes for dimethyl ether production by Rocha, Angela S., da S. Forrester, Aline M., Lachter, Elizabeth R., Sousa-Aguiar, Eduardo F., Faro, Arnaldo C.

“…[Display omitted] ► Use of niobium peroxo complexes allowed the preparation of alumina-supported niobia with up to 20wt% niobia in a single impregnation step…”
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Mechanistic studies through H–D exchange reactions: Propane aromatization in HZSM5 and Ga/HZSM5 catalysts by Rodrigues, Victor de O., Vasconcellos, Fábio Jorgede, Faro Júnior, Arnaldo da C.

“…[Display omitted] •HZSM5 shows both stepwise and multiple H–D exchange processes.•Multiple exchange process in HZSM5 is responsible for propylene…”
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On catalyst activation and reaction mechanisms in propane aromatization on Ga/HZSM5 catalysts by Rodrigues, Victor de O., Faro Júnior, Arnaldo C.

“…[Display omitted] ► Hydridogallium ions cannot be the active sites for alkane aromatization on Ga/HZSM5. ► Hydrogen competes with propane for hydrogenolysis…”
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Unsupported trimetallic Ni(Co)-Mo-W sulphide catalysts prepared from mixed oxides: Characterisation and catalytic tests for simultaneous tetralin HDA and dibenzothiophene HDS reactions by Licea, Yordy E., Grau-Crespo, Ricardo, Palacio, Luz A., Faro, Arnaldo C.

“…[Display omitted] •A-Mo-W (A=Ni or Co) bulk sulphides from A-Mo-W (A=Ni or Co) mixed oxides.•Co or Ni promoter determines the HDS and HDA…”
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Mixed NiMo, NiW and NiMoW sulfides obtained from layered double hydroxides as catalysts in simultaneous HDA and HDS reactions by Arias, Santiago, Licea, Yordy E., Soares, Douglas, Eon, Jean Guillaume, Palacio, Luz Amparo, Faro, Arnaldo C.

“…[Display omitted] •Sulfided HDT catalysts are prepared from Mo/W-Ni-Al layered double hydroxides (LDH).•HDT catalysts from LDHs have higher activity for HDA…”
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Heptamolybdate-intercalated CoMgAl hydrotalcites as precursors for HDS-selective hydrotreating catalysts by Coelho, Tiago L., Licea, Yordy E., Palacio, Luz Amparo, Faro, Arnaldo C.

“…•Heptamolybdate-CoMgAl hydrotalcites prepared from terephthalate precursors.•Heptamolybdate-CoMgAl hydrotalcites prepared with Al atom fraction above…”
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Influence of the Mg2+ or Mn2+ contents on the structure of NiMnAl and CoMgAl hydrotalcite materials with high aluminum contents by Coelho, Tiago, Micha, Renan, Arias, Santiago, Licea, Yordy E., Palacio, Luz Amparo, Faro, Arnaldo C.

“…•Pure NiAl- and CoAl-terephthalate hydrotalcite type materials with x >0.33.•CoMgAl- and NiMnAl-terephthalate trimetallic hydrotalcites were prepared.•EXAFS…”
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Direct comparison among the formation of terephthalate- and carbonate-intercalated Mg-Al-LDH: The influence of the high aluminum content by Nangoi, Inna M., Faro, Arnaldo C., Souza, Wladmir F., Chiaro, Sandra S.X., Leitão, Alexandre A.

“…First principles calculations based on Density Functional Theory (DFT) were used to investigate the standard thermodynamic potentials and also structural and…”
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Platinum catalysts supported on ZSM5 zeolites with a hierarchical pore structure: characterization and performance in n-hexadecane hydroconversion by Mesa, Holman J., Licea, Yordy E., Rodrigues, Victor de O., Faro, Arnaldo C.

“…HZSM5 zeolites with a hierarchical pore structure were prepared from a microporous one using the top-down methodology by treatment with a sodium hydroxide…”
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Low temperature low pressure benzene hydrogenation on Y zeolite-supported carbided molybdenum by Rocha, Ângela S., Silva, Victor L. T. da, Leitão, Alexandre A., Herbst, Marcelo H., Jr, Arnaldo C. Faro

“…Carbided molybdenum catalysts supported on ultrastable Y zeolites were prepared by adsorption of molybdenum hexacarbonyl vapors at 343 K or wet point…”
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Optimization and Study of the Response Surface of Properties for the Synthesis of ZSM-5 Zeolites with Hierarchical Pore Structure Obtained by Desilication by Mesa, Holman, Faro Jr, Arnaldo, Rodrigues, Victor

“…Hierarchical ZSM-5 zeolites were prepared by alkali treatment (desilication) at two temperatures, two reaction times, and two NaOH concentrations. A 23…”
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Characterization by 27Al NMR, X-ray Absorption Spectroscopy, and Density Functional Theory Techniques of the Species Responsible for Benzene Hydrogenation in Y Zeolite-Supported Carburized Molybdenum Catalysts by Rocha, Angela S, da Silva, Victor Teixeira, Eon, Jean G, de Menezes, Sônia M. C, Faro, Arnaldo C, Rocha, Alexandre B

“…Carburized molybdenum catalysts supported on a dealuminated NaH−Y zeolite were prepared by carburization under a 20% methane in hydrogen flow of two precursors…”
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V–Mg–Al catalyst from hydrotalcite for the oxidative dehydrogenation of propane by Valverde, Julian Antonio, Echavarría, Adriana, Eon, Jean-Guillaume, Faro, Arnaldo C., Palacio, Luz Amparo

“…Mixed oxides obtained by the calcination of hydrotalcite precursors intercalated with 30, 70 and 100 % of decavanadate (theoretical percentages) were used as…”
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Alumina-, niobia-, and niobia/alumina-supported NiMoS catalysts: Surface properties and activities in the hydrodesulfurization of thiophene and hydrodenitrogenation of 2,6-dimethylaniline by Rocha, Angela S., Faro, Arnaldo C., Oliviero, Laetitia, Van Gestel, Jacob, Maugé, Françoise

“…The activity of NiMoS catalysts supported on niobia, alumina, and niobia/alumina was compared for the thiophene hydrodesulfurization (HDS) and…”
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