Simultaneous Adsorption of 4,6-Dimethyldibenzothiophene and Quinoline over Nickel and Boron Modified Gamma-Al2O3 Adsorbent

ESTEBAN CAMÚ; Barbara Pastén; CAMILA MATUS; MARÍA FERNANDA RAMÍREZ; Juan Ojeda; Gonzalo Aguila; Patricio Baeza

Keywords: adsorption, alumina, nickel, boron, quinoline, 4,6-dimethyldibenzothiophene

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 di raction. 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 -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 coecients 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.

Más información

Título de la Revista: Processes
Volumen: 8
Editorial: MDPI Open Access Publishing
Fecha de publicación: 2020
Página de inicio: 1
Página final: 12
Idioma: ingles
Notas: WOS