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- Title
Electrodeposición de vanadio y níquel de los asfaltenos de crudos pesados.
- Authors
Lizcano-Valbuena, William H.; Aristizabal, Nayeli; Mañozca, Ivone; Afanasjeva, Natalia
- Abstract
Heavy metals are present in porphyrins in oil asphaltenes. High content of V and Ni could be attractive to produce high value metal oxides. These metals are undesirable due to corrosion issues and catalyst contamination in cracking processes. The purpose of this project was to prepare an electrochemical cell, with graphite work electrode, wire Ag counterelectrode and a Ag/AgNO reference electrode, in order to evaluate and make the electrochemical characterization and deposition of V and Ni content in resin asphaltene concentrate and pure asphaltenes obtained from Colombian heavy oils. High resolution analytics before and after the deposition was done: elemental analysis, FT-IR, and atomic absorption. The variables as work potential, reaction time and electrode materials during the electro-reduction was evaluated by cyclic voltammetry and chronoamperommeter in two solutions: (I) Tetrahydrofuran and LiClO4 at 0.02 M, and (II) 20% CH3OH, 0.5 % H3PO4, 0.1 M LiClO4 in acetonitrile. Results are discussed compared with traditional method of demetallization by acid digestion.
- Subjects
ASPHALTENE; ELECTRIC batteries research; NICKEL metallurgy; VANADIUM metallurgy; PETROLEUM research
- Publication
Ingeniería y Competitividad, 2015, Vol 17, Issue 2, p9
- ISSN
0123-3033
- Publication type
Article