HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Imaging of alumina supports by laser-induced breakdown spectroscopy: A new tool to understand the diffusion of trace metal impurities

Abstract : Imaging the distribution of reactive molecules in an internal diffusion-limited catalyst is of primary importance in the comprehension and modeling of these systems. Mesoporous alumina supports were impregnated with asphaltenes in a self-pressurized autoclave at high pressure (5 MPa) and high temperature (523 K). Extrudates were then analyzed by laser-induced breakdown spectroscopy (LIBS). We showed that LIBS can provide quantitative concentration maps of sulfur , nickel and vanadium in the ppm range. Processing of these maps is proposed to obtain one-dimensional profiles of the penetration of these elements. These profiles show that the penetration of asphaltenes into the catalyst support is a very complex process. These findings contribute to improving the comprehension of internal diffusion-limited processes, particularly the hy-drodemetallization (HDM) process of oil residues. This report also indicates that LIBS-based 2 imaging represents a powerful tool for quickly providing two-dimensional elemental maps over a large dynamic range, i.e., typically from ppm to tens of %, thereby opening up opportunities for innumerable applications in the field of catalysis.
Document type :
Journal articles
Complete list of metadata

https://hal-ifp.archives-ouvertes.fr/hal-01978484
Contributor : Catherine Belli Connect in order to contact the contributor
Submitted on : Friday, January 11, 2019 - 3:20:49 PM
Last modification on : Tuesday, January 4, 2022 - 4:39:33 AM

Identifiers

Citation

Florian Trichard, Florine Gaulier, Jérémie Barbier, Didier Espinat, Bertrand Guichard, et al.. Imaging of alumina supports by laser-induced breakdown spectroscopy: A new tool to understand the diffusion of trace metal impurities. Chinese Journal of Catalysis, Elsevier, 2018, 363, pp.183-190. ⟨10.1016/j.jcat.2018.04.013⟩. ⟨hal-01978484⟩

Share

Metrics

Record views

49

Files downloads

110