Preparation and evaluation of (Ni)CoMo hydrodesulfurization catalysts supported over a binary Zeolite(beta)-KIT siliceous material

  • G Torres-Otáñez
  • Jorge Noe Diaz de Leon Universidad Nacional Autonoma de Mexico Centro de Nanociencias y Nanotecnologia
  • T. A. Zepeda
  • B. Pawelec
  • J.L.G. Fierro
  • S. Fuentes

Abstract

In this work, a mesoporous nanocomposite Zeolite(Beta)-KIT-6 material was synthesized and used as a support to prepare NiCoMo catalysts. We prepared CoMo, NiMo (Co  or Ni =2.4 wt.% and Mo=9.0 wt%) and (x)NiCoMo (x = 0.6, 1.2, and 2.4 wt% Ni).  The support and catalysts were characterized and tested in the hydrodesulfurization (HDS) reaction of dibenzothiophene (DBT).  The catalytic activity results show that the CoMo and NiMo samples are more active than the trimetallic catalysts  due to a better dispersion of MoS2 (lower stacking and length) which induce a higher concentration of CoMoS and NiMoS sites. The HRTEM results also showed that the increase of the Ni concentration causes the increase of  length and stacking of the MoS2 slabs. The XPS analysis exhibited that the amount of  Co sulfided species in trimetallic catalysts follows a linear trend with the catalytic activity. The β-KIT-6 bimetallic supported catalysts showed better catalytic activities than those supported on KIT-6 and SBA-15 mesoporous silicas.

Published
Oct 11, 2017
How to Cite
TORRES-OTÁÑEZ, G et al. Preparation and evaluation of (Ni)CoMo hydrodesulfurization catalysts supported over a binary Zeolite(beta)-KIT siliceous material. Revista Mexicana de Ingeniería Química, [S.l.], v. 17, n. 1, p. 215-228, oct. 2017. ISSN 2395-8472. Available at: <http://rmiq.org/ojs/index.php/rmiq/article/view/157>. Date accessed: 18 dec. 2017.
Section
Catalysis, kinetics and reactors

Received 8 June 2017, published online 11 October 2017