Edjane F. B. Silva
Federal University of Rio Grande do Norte
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Featured researches published by Edjane F. B. Silva.
Revista Virtual de Química | 2014
Cícero S. Lima; Regineide O. Lima; Edjane F. B. Silva; Késia Kelly V. Castro; Osvaldo Chiavone Filho; Sandra de A. Soares; Antonio S. Araujo
The petroleum oily sludge is formed during the production, transportation, and storage processes as well as in the oil refinery plant. The elemental analysis was performed with samples of petroleum oily sludge collected in the State of Rio Grande do Norte. For the carbon and hydrogen elements, small differences were observed between them, but for the oxygen element, bigger differences between the sludge samples were noticed. They have presented differences in the chemical composition of inorganic and organic parts. The sludge from oil-water separator (OWS) 2 showed a high amount of oil (94.88%), being considered a high value-added residue by the oil industry. In the analyses of saturated, aromatics, resins, and asphaltenes (SARA) components, the sludge from the unloading had a high amount of saturates. The inorganic material separated from the sludge of the OWS 2 was characterized, and presented a lot of sulfur (41.57 %). The sludge analyzed showed a high value of organic components, thus such material can be handled and reprocessed in processing units within the oil industry.
Materials Science-poland | 2015
Meiry Glaúcia Freire Rodrigues; Antonielly S. Barbosa; Ana C. F. Coriolano; Edjane F. B. Silva; Antonio S. Araujo
Abstract The hydrothermal synthesis of MCM-22 zeolite was carried out using silica, sodium aluminate and hexamethyleneimine, under static conditions at 150 °C for a period of 10 days, followed by washing with deionized water, drying overnight and calcination at 650 °C. The obtained material was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). The XRD analysis evidenced that MCM-22 presented a well defined MWW structure. The FT-IR spectrum confirmed the efficiency of the hexamethyleneimine as an organic template used to direct the structure of the MCM-22 zeolite under static conditions. The SEM image indicated that the particles are spherical in shape, with a diameter of ca. 10 μm. The acid properties of the MCM-22 zeolite, as determined by n-buthylamine adsorption, were investigated in the temperature ranges of 105 to 300 °C and 300 to 525 °C, relative to medium and strong acid sites, respectively.
Journal of Materials Science | 2013
Geraldo E. Luz; Francisco das Chagas A. Lima; Cicero O. Costa Neto; Gizeuda L. Paz; Edjane F. B. Silva; Marcela N. Barbosa
In this study, the interaction ways between n-butyl amine and SBA-15 molecular sieve were evaluated when the TPD technique is carried out to determine the total acidity of that solid. Experimental results (FTIR, TG/DTG, total acid, and catalytic activity) and theoretical calculations demonstrated that the n-butyl amine, used as probe molecule to total acidity determined by TPD, can act as acid or base depending on the nature and force of the active sites on SBA-15.
Journal of Thermal Analysis and Calorimetry | 2011
Marcela N. Barbosa; Antonio S. Araujo; Luzia P. F. C. Galvão; Edjane F. B. Silva; Anne Gabriella Dias Santos; Geraldo E. Luz; V. J. Fernandes
Journal of Thermal Analysis and Calorimetry | 2011
Edjane F. B. Silva; Marcílio P. Ribeiro; Luzia P. F. C. Galvão; V. J. Fernandes; Antonio S. Araujo
Journal of Thermal Analysis and Calorimetry | 2011
Edjane F. B. Silva; Marcílio P. Ribeiro; Ana Catarina Fernandes Coriolano; Ana C. R. Melo; Anne Gabriella Dias Santos; V. J. Fernandes; Antonio S. Araujo
Journal of Thermal Analysis and Calorimetry | 2011
Maria J. F. Costa; Antonio S. Araujo; Edjane F. B. Silva; Mirna F. Farias; V. J. Fernandes; Petrus A. Santa-Cruz; Jose G.A. Pacheco
Journal of Thermal Analysis and Calorimetry | 2011
Késia Kelly V. Castro; Ana A. D. Paulino; Edjane F. B. Silva; Thiago Chellappa; Maria B. D. L. Lago; V. J. Fernandes; Antonio S. Araujo
Journal of Thermal Analysis and Calorimetry | 2011
Hellyda K. T. A. Silva; Thiago Chellappa; Fabíola C. Carvalho; Edjane F. B. Silva; Tarcísio A. Nascimento; Antonio S. Araujo; V. J. Fernandes
Journal of Thermal Analysis and Calorimetry | 2011
Ana C. R. Melo; Edjane F. B. Silva; Larissa Cicianny Luz Ferreira de Araújo; Mirna F. Farias; Antonio S. Araujo