Restraining deactivation of hierarchical zeolite supported NiW catalysts in the HDS of thiophene

Y. Wang (1) , C. Lancelot (2) , C. Lamonier (2) , M. Yang (1) , Y. Sun (1) , J. Morin (2) , Arnaud Rives (3)

1 HIT - Harbin Institute of Technology
2 UCCS - Unité de Catalyse et Chimie du Solide - UMR 8181
3 LCC - Laboratoire de chimie de coordination

NiW catalysts supported on g-Al 2 O 3 (NiW/Al 2 O 3), commercial Beta (NiW/HB) and hierarchical Beta prepared by base-acid treatment (NiW/HB-M) were characterized by X-ray diffraction (XRD), N 2 sorption, infrared spectroscopy (IR), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The catalytic performance of these catalysts was evaluated in the hydrodesulfurization (HDS) of thiophene. The results indicate that NiW/HB as well as NiW/HB-M endured important and rapid deactivation showing that the introduction of additional mesopores/macropores in the support could not prevent the deactivation tendency. Interestingly, NiW/HB or NiW/HB-M mixed with NiW/Al 2 O 3 and the utilization of Na +-exchanged Beta as a support remarkably improved the anti-deactivation ability of the catalysts. As a result, the catalysts NiW/NaB-M (NiW catalyst supported on Na +-exchanged hierarchical Beta) and NiW/20HB-M (20% NiW/HB-M mixed with 80% NiW/Al 2 O 3) gave superior catalytic activity than NiW/Al 2 O 3 .

Domaines: Catalyse; Chimie organique

Y. Wang, C. Lancelot, C. Lamonier, M. Yang, Y. Sun, et al.. Restraining deactivation of hierarchical zeolite supported NiW catalysts in the HDS of thiophene. RSC Advances, 2015, 5 (90), pp.74150-74158. ⟨10.1039/c5ra12029b⟩. ⟨hal-01869547⟩