Simultaneous adsorption of 4,6-dimethyldibenzothiophene and quinoline over Nickel and Boron modified Gamma-Al2O3 adsorbent

Esteban Camu, Barbara Pasten, Camila Matus, Fernanda Ramirez, Juan Ojeda, Gonzalo Aguila, Patricio Baeza

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The simultaneous adsorption of quinoline and 4,6-dimethyldibenzothiophene over adsorbents, based on alumina modified with boron and nickel under ambient temperature and pressure, was studied. The adsorbents were characterized by BET specific surface area, a potentiometric method for the determination of acid strength, electrophoretic migration, and X-ray diffraction. The results showed that the adsorbent containing nickel had better adsorption capacity than the adsorbent modified with nickel and boron, which was attributed to its greater acidity and ability to generate π-complexation between the adsorbent and the molecules. In terms of selectivity, quinoline was more adsorbed than 4,6-dimethyldibenzothiophene in all systems, due to the basic nature of quinoline. The experimental data in all cases were adjusted by three kinetic models (Yoon-Nelson, Yan and Thomas), and the regression coefficients in all models were close to one. Finally, the values of the kinetic constant obtained by the Thomas model were used to relate the adsorption capacity results.

Original languageEnglish
Article number419
JournalProcesses
Volume8
Issue number4
DOIs
Publication statusPublished - 1 Apr 2020

Keywords

  • 4,6-dimethyldibenzothiophene
  • Adsorption
  • Alumina
  • Boron
  • Nickel
  • Quinoline

ASJC Scopus subject areas

  • Bioengineering
  • Chemical Engineering (miscellaneous)
  • Process Chemistry and Technology

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