SciAct
Toggle navigation
  • EN
  • RU

Sections:

  • Articles
  • Books
  • Conference attendances
  • Conference theses
  • Patents

Hydroprocessing of Maya Vacuum Residue Using a NiMo Catalyst Supported on Cr-Doped Alumina Full article

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Original
Journal Fuel
ISSN: 0016-2361 , E-ISSN: 1873-7153
Output data Year: 2020, Volume: 263, Article number : 116717, Pages count : 9 DOI: 10.1016/j.fuel.2019.116717
Tags Asphaltene; Cr-doped alumina; Hydrocracking; Hydroprocessing; NiMo catalyst; Vacuum residue
Authors Puron Holda 1 , Pinilla Jose Luis 1 , Saraev Andrey A. 2,3 , Kaichev Vasily V. 2,3 , Millan Marcos 1
Affiliations
1 Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, UK
2 Boreskov Institute of Catalysis, Novosibirsk, 630090, Russia
3 Novosibirsk State University, Novosibirsk, 630090, Russia

Funding (2)

1 Skolkovo Foundation
BP Chemicals Limited, Research Laboratory
2 National Council of Science and Technology

Abstract: Mesoporous alumina was doped with Cr using a co-precipitation method to prepare a support for hydrocracking catalysts. Ni and Mo were then impregnated on Cr-doped mesoporous alumina (NiMo/Al2O3-Cr). Catalytic activity was tested in hydrodeasphaltenisation (HDA), hydrodesulfurisation (HDS) and hydrodemetallisation (HDM) of Maya vacuum residue in a batch reactor and compared with NiMo supported on mesoporous alumina not doped with Cr (NiMo/Al2O3). Following activation and initial carbon deposition, experiments involving contact of the catalysts with fresh feed were performed. Greater HDA extent and maltene to asphaltene ratios were obtained with NiMo/Al2O3-Cr than NiMo/Al2O3 despite a larger amount of coke deposits. Significant activity of both NiMo/Al2O3-Cr and NiMo/Al2O3 towards HDS and HDM were also observed. Alumina textural properties remained relatively unaffected by the co-precipitation of Cr. X-ray photoelectron spectroscopy (XPS) showed that the catalysts contained Cr3+ and after reduction all Ni was present in metallic state at least in the near-surface region, while Mo6+ was reduced to Mo4+ and Moδ+ (0 ≤ δ ≤ 3) to a larger extent in NiMo/Al2O3-Cr. Lower reduction temperatures in the presence of Cr were determined, suggesting a larger number of metal sites available in reduced form at operating conditions. It was found that Cr aided metal dispersion in catalyst synthesis and coke dispersion during reaction. Spent catalysts showed reductions in surface area and pore volume. However, while spent NiMo/Al2O3 catalysts had a decrease in average pore diameter (APD), NiMo/Al2O3-Cr maintained the fresh material APD, which may explain the sustained catalytic activity. © 2019 Elsevier Ltd
Cite: Puron H. , Pinilla J.L. , Saraev A.A. , Kaichev V.V. , Millan M.
Hydroprocessing of Maya Vacuum Residue Using a NiMo Catalyst Supported on Cr-Doped Alumina
Fuel. 2020. V.263. 116717 :1-9. DOI: 10.1016/j.fuel.2019.116717 publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
Dates:
Submitted: Sep 24, 2019
Accepted: Nov 20, 2019
Published online: Dec 4, 2019
Published print: Mar 1, 2020
Identifiers:
publication_identifier.wos_identifier_type WOS:000504834400061
publication_identifier.scopus_identifier_type 2-s2.0-85076613946
publication_identifier.rinz_identifier_type 43219313
publication_identifier.accession_number_identifier_type 2019:2310177
Altmetrics: