Zobrazeno 1 - 5
of 5
pro vyhledávání: '"Eledir Vitor Sobrinho"'
Autor:
Luciene Santos Carvalho, Vitor Rodrigo de Melo e Melo, Eledir Vitor Sobrinho, Doris Ruiz, Dulce Maria de Araújo Melo
Publikováno v:
Materials Research, Vol 21, Iss 1 (2017)
In this paper, magnesium aluminate spinels were prepared by microwave-assisted combustion, using urea as fuel. In order to evaluate the effect of the urea excess used in the synthesis, its mass was added in a range of 1.0 to 2.5 times the stoichiomet
Externí odkaz:
https://doaj.org/article/b7ff2fb97b7b4769880c34272e1a0934
Autor:
Luiz Antônio Magalhães Pontes, Josanaide Sant'Ana Ribeiro Teixeira, Rodrigo B.S. Rocha, Paulo Ricardo Bittencourt Guimarães, Eledir Vitor Sobrinho, Leonardo S. G. Teixeira
Publikováno v:
Talanta. 72:1073-1076
This paper proposes an alternative analytical method using energy dispersive X-ray fluorescence (EDXRF) to determine Fe and Cu in gasoline samples. In the proposed procedure, samples were distilled and the distillation residues were spotted on cellul
Autor:
Luiz Antônio Magalhães Pontes, Eledir Vitor Sobrinho, Paulo Ricardo Bittencourt Guimarães, Hilda Costa dos Santos, Leonardo S. G. Teixeira, Jurema de Castro Souza, Regina Ferreira Vianna
Publikováno v:
Fuel Processing Technology. 88:73-76
In this research work, the effect of different concentrations of copper, iron, lead, zinc and nickel ions on the tendency for gum formation in gasohol fuel is investigated. For that purpose, a gasohol sample has been doped with these five metals ions
Autor:
Ieda M. G. Santos, José Carlos Oliveira Santos, Valter J. Fernandes, Antonio G. Souza, Arilson José N. Silva, Eledir Vitor Sobrinho
Publikováno v:
Fuel. 83:2393-2399
This work aims to characterize thermal degradation process of automotive mineral lubricants, in relation to its rheological and thermoanalytical properties. Lubricants were degraded at temperatures varying from 150 to 210 °C, and times of 1–48 h.
Publikováno v:
Adsorption. 9:205-212
Mesoporous materials have been intensely studied recently, mainly as possible component for FCC (Fluid Catalytic Cracking) catalysts due to their large surface area and accessibility to large hydrocarbon molecules. It is thus of interest for the oil