Desulfurization of Model Oil through Adsorption over Activated Charcoal and Bentonite Clay Composites

Abstract

Adsorption of dibenzothiophene (DBT) from model oil was investigated using composites of pure activated charcoal and pure bentonite clay. DBT adsorption was carried out in batch mode experiments at laboratory scale, where the developed composite materials showed a synergistic effect in removal of DBT from the model oil in terms of improved surface acidity of the pure activated charcoal and mesoporous structure of the pure bentonite clay. Thermodynamics, kinetics, and optimization of various adsorption parameters were investigated. Kinetic analyses proved that DBT adsorption followed pseudo‐second‐order kinetics. To study the thermodynamics of the adsorption, different isotherm adsorption models were applied. The Langmuir isotherm best fitted to the adsorption data. Various thermodynamic parameters were evaluated, including Gibbs free energy, entropy, and enthalpy.

Science and Technology Progress on the Desulfurization Process of Crude Oil

“…Due to the acid–base interactions, the organosulfur compounds are more preferably adsorbed on the modified‐activated carbon and thus a selective and efficient adsorption process is possible to be established. Same catalytical activity enhancement was also found for Al 2 O 3 , bentonite, and montmorillonite materials 51,53,54,64 . The regeneration of activated carbon is simply conducted through a washing process with toluene 74 .…”

Polyethylene terephthalate waste‐derived activated carbon for adsorptive desulfurization of dibenzothiophene from model gasoline: Kinetics and isotherms evaluation

“…This phenomenon is labeled as the impact of solid concentration or particle overcrowding 44,45 . The same observations have been witnessed upon DBT removal using Mongolian anthracite‐based AC, 46 zirconia‐derived adsorbents, 47 and AC‐bentonite clay composites 48 …”

“…The adsorption isotherm could supply the mode of interactions between the adsorbate molecules and the adsorbent surface. It also provides information to understand the adsorption process 48 . Therefore, both Langmuir (Figure 8) and Freundlich (Figure 9) adsorption isotherms were implemented in the analysis of the adsorption data of DBT adsorption onto PETAC.…”

Preparation of V2o5 @Mesoporous Silica Sphere for Novel Dual Oxidativeadsorptive Desulfurization

“…As shown fig. 7 the amounts adsorbed (mg g -1 ) increases with increasing of initial concentration that's due to improve the mass transfer of adsorbate species from the bulk solution to the absorbent surface (44,45,50). Additionally, the sample did not achieve saturation up to initial concentration of 1000 mg L -1 .…”