Ex Situ Upgrading of Extra Heavy Oil: The Effect of Pore Shape of Co-Mo/γ-Al2O3 Catalysts

Co-Mo/γ-Al2O3 catalysts with different pore shapes were synthesized for the ex situ upgrading of extra heavy oils by hydrodesulfurization (HDS), hydrodemetallization (HDM), and hydrodeasphaltization (HDA). The catalysts were synthesized using aluminum oxides that were prepared by various methods. It...

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Bibliographic Details
Published in:Catalysts 2022-10, Vol.12 (10), p.1271
Main Authors: Kirgizov, Alexey Y., Ding, Baodong, Spiridonov, Artur A., Liu, Lei, Laskin, Artem I., Cao, Chang, Il’yasov, Il’dar R., Al-Muntaser, Ameen A., Zhou, Xiaodong, Zinnatov, Radik A., Lamberov, Alexander A., Yuan, Chengdong, Varfolomeev, Mikhail A.
Format: Article
Language:English
Subjects:
Acids
Adsorption
Aluminum
Aluminum oxide
aluminum oxides carrier
Asphaltenes
Bayer process
Catalysts
Catalytic activity
Chemical reactions
Chemical synthesis
Co-Mo catalyst
ex situ upgrading
extra heavy oil
Gibbsite
Heavy metals
Hydrodesulfurization
hydrotreatment
Metals
Nitric acid
Nitrogen
pore shape
Pore size
Resins
Shape effects
Sodium aluminate
Sulfur
Transitional aluminas
Viscosity
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Summary:Co-Mo/γ-Al2O3 catalysts with different pore shapes were synthesized for the ex situ upgrading of extra heavy oils by hydrodesulfurization (HDS), hydrodemetallization (HDM), and hydrodeasphaltization (HDA). The catalysts were synthesized using aluminum oxides that were prepared by various methods. It was found that using the product obtained by the thermochemical activation of gibbsite leads to the formation of slit-shaped pores in aluminum oxide, while the application of the hydroxide deposition method by the precipitation of sodium aluminate and nitric acid gives cylindrical pores in aluminum oxide. Co-Mo catalysts synthesized using these two types of pores exhibit different catalytic activities. The catalyst synthesized on a carrier with cylindrical pores exhibited a higher catalytic activity in sulfur, heavy metals, and asphaltenes removal reactions that are synthesized on a carrier with slit-like pores. This is because the presence of cylindrical pores leads to a decrease in diffusion restrictions when removing large molecules of asphaltenes and sulfur-containing and metal-containing compounds.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal12101271