Competitive adsorptions between thiophenic compounds over CoMoS/Al 2 O 3 under deep HDS of FCC gasoline

Alan Silva dos Santos (1) , Etienne Girard (2) , Philibert Leflaive (2) , Sylvette Brunet (1)

1 IC2MP - Institut de Chimie des Milieux et Matériaux de Poitiers
2 IFPEN - IFP Energies nouvelles

The transformation of various model sulfur compounds (2-methylthiophene: 2MT, 3-methylthiophene: 3MT and benzothiophene: BT) representative of sulfur compounds in FCC gasoline was investigated over a CoMoS/Al2O3 catalyst. More specifically, a quantitative reactivity scale was established with BT being more reactive than 3MT and 2MT. In mixture, their reactivity was reduced due to the presence of the other sulfur compound, the scale of reactivity being preserved. BT strongly inhibits the transformation of 2MT. With a single kinetic model based on a Langmuir Hinshelwood formalism, kinetic and adsorption parameters were calculated and the results explained by mutual competitive adsorption between 2MT and BT with a higher adsorption constant for BT compared to that of 2MT.

Keywords: 3-methylthiophene; benzothiophene; kinetic modeling 2; Hydrodesulfurization; FCC gasoline; 2-methythiophene

Domains: Catalysis

Alan Silva dos Santos, Etienne Girard, Philibert Leflaive, Sylvette Brunet. Competitive adsorptions between thiophenic compounds over CoMoS/Al 2 O 3 under deep HDS of FCC gasoline. Applied Catalysis A : General, 2019, 570, pp.292-298. ⟨10.1016/j.apcata.2018.11.032⟩. ⟨hal-02008048⟩