NiMCM-36 and NiMCM-22 catalysts for the ethylene oligomerization. Effect of zeolite texture and nickel cations/acid sites ratio

Michael Lallemand (1) , Oana Alice Rusu (2) , Emil Dumitriu (2) , Annie Finiels (1) , François Fajula (1) , Vasile Hulea (1)

1 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
2 UTI - Laboratory of Organic Chemistry

Nickel ion-exchanged MCM-36 and MCM-22 zeolites were prepared, characterized, and tested in the ethylene oligomerization reaction performed in slurry semi-batch mode (T = 70–150 8C, p = 4 MPa). The behavior of catalysts was evaluated in relation to their texture and nickel cations/acid sites ratio. NiMCM-36 catalysts, with large accessibility in the mesoporous structure and mild acidity, showed an excellent activity (46 g of oligomers/gcatalyst h) and selectivity (100% olefins with even number of carbon atoms) in ethylene oligomerization, while lower catalytic activity and selectivity were observed over NiMCM-22 possessing microporous structure and high acid sites concentration.

Mots clés: NiMCM-36; NiMCM-22; Acidity; Ethylene; Oligomerization

Domaines: Catalyse

Michael Lallemand, Oana Alice Rusu, Emil Dumitriu, Annie Finiels, François Fajula, et al.. NiMCM-36 and NiMCM-22 catalysts for the ethylene oligomerization. Effect of zeolite texture and nickel cations/acid sites ratio. Applied Catalysis A : General, 2008, 338, pp.37-43. ⟨10.1016/j.apcata.2007.12.024⟩. ⟨hal-00261457⟩