Comprehensive GCxGC Characterization of the Catalytic Alkylation of Thiophenic Compounds in a FCC Gasoline

H. Obame , G. Toussaint (1) , D. Laurenti (1) , M. Tayakout , C. Geantet (1)

1 RAFFINAGE - RAFFINAGE

Comprehensive GCxGC analysis with MS and FPD detection was performed to follow the alkylation of thiophenic compounds with olefins in a FCC gasoline over a supported phosphotungstic acid catalyst, under continuous flow at 120 A degrees C and 0.5 MPa. Doping with 3-methylthiophene (3MT) or benzothiophene (BT) was used to enhance the response of each type of S compounds after alkylation. The combination of the two detectors allowed to isolate different families of products: alkyl-3MT, alkenyl-3MT, alkyl-BT as well as undesired dimerized olefins or alkylated aromatics. Quantification of the families and the calculation of conversion of initial S compounds, aromatics and olefins and their respective distributions were also performed. This work illustrates that GCxGX technique can provide a unique comprehensive understanding of the various catalytic reactions involved in a complex matrix such as an FCC gasoline during its conversion on an acidic catalyst.

Domaines: Catalyse; Environnement et Société

H. Obame, G. Toussaint, D. Laurenti, M. Tayakout, C. Geantet. Comprehensive GCxGC Characterization of the Catalytic Alkylation of Thiophenic Compounds in a FCC Gasoline. Topics in Catalysis, 2013, 56, pp.1731-1739. ⟨10.1007/s11244-013-0109-z⟩. ⟨hal-00912605⟩