TY - JOUR
T1 - The effect of oxidation and resulfidation on (Ni/Co)MoS2 hydrodesulfurisation catalysts
AU - Bremmer, G. Marien
AU - van Haandel, Lennart
AU - Hensen, Emiel J.M.
AU - Frenken, Joost W. M.
AU - Kooyman, Patricia J.
N1 - Funding Information:
This work was supported by the Netherlands Organization for Scientific Research (NWO/OCW) as part of the Frontiers of NanoScience (NanoFront) program . The funding agency, apart from selecting the project for funding, did not play any role in study design, data collection, data analysis and interpretation, or in the decision to submit the work for publication.
Publisher Copyright:
© 2018 The Authors
PY - 2019/4
Y1 - 2019/4
N2 - The effect of a sequential oxidation and resulfidation treatment on γ-Al2O3 supported (Ni/Co)MoS2 catalyst nanoparticles was investigated using (HR)TEM, XPS, and thiophene HDS catalytic performance experiments. Analysis of the HRTEM images revealed that, after initial sulfidation and oxidation, the resulfidation treatment restored the original slab length or increased it. The chemical composition of the samples, as determined by XPS, also slightly changed: the concentration of oxidic species increased, especially for the Ni promoter atoms. Comparing the catalytic HDS activity of the samples before and after the oxidation-resulfidation treatment showed that the catalysts were more than 20% more active after resulfidation. This increase in HDS activity is ascribed to a redistribution of the (Ni/Co)MoS2 slabs during the second sulfidation treatment, indicating a size effect.
AB - The effect of a sequential oxidation and resulfidation treatment on γ-Al2O3 supported (Ni/Co)MoS2 catalyst nanoparticles was investigated using (HR)TEM, XPS, and thiophene HDS catalytic performance experiments. Analysis of the HRTEM images revealed that, after initial sulfidation and oxidation, the resulfidation treatment restored the original slab length or increased it. The chemical composition of the samples, as determined by XPS, also slightly changed: the concentration of oxidic species increased, especially for the Ni promoter atoms. Comparing the catalytic HDS activity of the samples before and after the oxidation-resulfidation treatment showed that the catalysts were more than 20% more active after resulfidation. This increase in HDS activity is ascribed to a redistribution of the (Ni/Co)MoS2 slabs during the second sulfidation treatment, indicating a size effect.
KW - (Ni/Co)MoS hydrodesulfurization catalyst
KW - High-resolution transmission electron microscopy
KW - Oxidation-resulfidation
KW - Thiophene HDS
KW - X-ray photoelectron spectroscopy
UR - https://www.scopus.com/pages/publications/85055266285
U2 - 10.1016/j.apcatb.2018.10.014
DO - 10.1016/j.apcatb.2018.10.014
M3 - Article
AN - SCOPUS:85055266285
SN - 0926-3373
VL - 243
SP - 145
EP - 150
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
ER -