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Evidence of selective asphaltene subfraction adsorption on SiO 2 nanoparticles studied by UV-vis absorbance and fluorescence spectroscopy

Authors :
Genesis Gonzalez
Jimmy Castillo
Brice Bouyssiere
Wladimir Ruiz
Vicmary Vargas
Universidad Central de Venezuela (UCV)
Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM)
Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Source :
Journal of Dispersion Science and Technology, Journal of Dispersion Science and Technology, Taylor & Francis, In press, pp.1-7. ⟨10.1080/01932691.2020.1845956⟩
Publication Year :
2020
Publisher :
HAL CCSD, 2020.

Abstract

International audience; The study of asphaltene adsorption onto nanoparticles is an area of great interest due to its ability to mitigate problems caused by asphaltenes in the oil industry. In this work, UV-vis absorbance and fluorescence spectroscopy were used to study asphaltene adsorption onto silica nanoparticles prepared from rice husk ash. The adsorption process followed a Dubinin-Radushkevich adsorption behavior, which suggested a progressive adsorption of larger aggregates onto the nanoparticles. From the Gaussian decomposition of the fluorescence emission spectra, it was determined that species of high molecular weight were preferentially adsorbed on the nanoparticles. These results have both academic and industrial importance since they help to propose more suitable thermodynamic models and methodologies to mitigate the issues related to adsorption and deposition of asphaltenes on surfaces.

Details

Language :
English
ISSN :
01932691 and 15322351
Database :
OpenAIRE
Journal :
Journal of Dispersion Science and Technology, Journal of Dispersion Science and Technology, Taylor & Francis, In press, pp.1-7. ⟨10.1080/01932691.2020.1845956⟩
Accession number :
edsair.doi.dedup.....de322381eb883c69af0b745884c3fcc9
Full Text :
https://doi.org/10.1080/01932691.2020.1845956⟩