Chemical modification of cobalt ferrite nanoparticles with possible application as asphaltene flocculant agent

AUTOR(ES)

Oliveira, G. E., Clarindo, J. E. S., Santo, K. S. E., Souza Jr., F. G.

FONTE

Mat. Res.

DATA DE PUBLICAÇÃO

02/04/2013

RESUMO

Asphaltenes can cause enormous losses in the oil industry, because they are soluble only in aromatic solvents. Therefore, they must be removed from the petroleum before it is refined, using flocculant agents. Aiming to find new materials that can work as flocculant agents to asphaltenes, cobalt ferrite nanoparticles were chemically modified through acid-base reactions using dodecylbenzene sulfonic acid (DBSA) to increase their lipophilicity. Nanoparticle synthesis was performed using the co-precipitation method followed by annealing of these nanoparticles, aiming to change the structural phase. Modified and unmodified nanoparticles were tested by FTIR-ATR, XRD and TGA/DTA. In addition, precipitation onset of the asphaltenes was performed using modified and unmodified nanoparticles. These tests showed that modified nanoparticles have a potential application as flocculant agents used to remove asphaltenes before oil refining, since the presence of nanoparticles promotes the asphaltene precipitation onset with the addition of a small amount of non-solvent.

Documentos Relacionados

• Zinc Ferrite Nanoparticles via Coprecipitation Modified Method: Glycerol as Structure Directing and Stabilizing Agent
• Application of Nickel Ferrite Nanoparticles in Adsorption of Amoxicillin Antibiotic
• Chitosan as flocculant agent for clarification of stevia extract
• Investigation of Structural, Morphological, Magnetic Properties and Biomedical applications of Cu2+ Substituted Uncoated Cobalt Ferrite Nanoparticles
• Nanopartículas magnéticas de cobalto metálico e ferrita de cobalto recobertas com ouro como materiais biocompatíveis visando aplicações em biomedicina