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Naphtha reforming Pt-Re-Ge/Al2O3 catalysts prepared by catalytic reduction. Influence of the pH of the Ge addition step
(Elsevier Science, 2008-04)
Pt-Re-Ge/γAl2O3 catalysts were prepared by the catalytic reduction method using different impregnation media (H2O, HCl and NH3) and different Ge contents (0.0, 0.1, 0.3, 1.0 and 2.0%). The influence of these preparation ...
Tailoring materials by high-energy ball milling: TiO2 mixtures for catalyst support application
(Elsevier, 2020-09)
We carried out a rational design of catalyst supports by high-energy ball milling. Tailored mixtures of TiO2 crystalline phases were obtained using rotational speed and milling time as variable parameters. Polymorphic ...
Propane oxidative dehydrogenation on V-Sb/ZrO2 catalysts
(Springer, 2008-05)
The catalytic properties of V?Sb/ZrO2 and bulk Sb/V catalysts for the oxidative dehydrogenation of propane were studied. Samples were characterized by nitrogenadsorption, temperature-programmed reduction, temperature-programmed ...
Ru‐Pt catalysts supported on Al2O3 and SiO2─Al2O3 for the selective ring opening of naphthenes
(Wiley, 2019-11)
Alumina and silica-alumina supported Ru-Pt catalysts were evaluated for the ring opening of naphthenes. Pt, Ru and Ru-Pt catalysts were prepared by impregnation of inorganic precursors over γ-alumina and silica-alumina ...
Phenol methylation on acid catalysts: Study of the catalyst deactivation kinetics and mechanism
(Elsevier Science, 2014-01)
The kinetics and mechanism of coke formation and catalyst deactivation during the synthesis of cresols from phenol methylation were investigated on SiO2–Al2O3, tungstophosphoric acid (HPA) supported on silica, and zeolites ...
Role of Sn in Pt-Re-Sn/Al2O3-Cl catalysts for naphtha reforming
(Elsevier Science, 2005-10)
The influence of Sn addition on the catalytic activity of Pt-Re/Al 2O3 naphtha reforming catalysts was studied. Trimetallic Pt-Re-Sn catalysts supported on chlorided alumina were prepared by coimpregnation. The content of ...
Evolution of the properties of PtGe/Al2O3 reforming catalysts with Ge content
(Elsevier Science, 2007-08)
The effect of the Pt/Ge atomic ratio on the catalytic activity of PtGe/Al2O3 catalysts used in n-heptane reforming was studied. The samples were prepared by the coimpregnation method on chlorinated alumina. The platinum ...
Modelagem termodinâmica computacional de ligas multicomponentes cúbicas de corpo centrado para armazenagem de hidrogênio
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEMCâmpus São Carlos, 2021-09-20)
Recently, multicomponent metal alloys for hydrogen storage have drawn attention due to the possibility of exploring a large compositional field, which can
allow the control of storage properties by controlling the alloy ...
Oxidative dehydrogenation of ethylbenzene to styrene over the CoFe2O4-MCM-41 catalyst: Preferential adsorption on the O2-Fe3+O2- sites located at octahedral positions
(2019-01-01)
The present study describes the catalytic performance of cobalt ferrite supported on MCM-41 for the oxidative dehydrogenation of ethylbenzene. The catalytic activity of cobalt ferrite was compared with that of the traditional ...
Synthesis of bioadditives of fuels from biodiesel-derived glycerol by esterification with acetic acid on solid catalysts
(Taylor & Francis, 2017-06)
In this paper, glycerol esterification with acetic acid was studied on several solid acid catalysts: Al2O3, Al-MCM-41, HPA/SiO2, HBEA, Amberlyst-15 and Amberlyst-36 with the aim of determining the reaction conditions and ...