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- W24919794 abstract "The catalyst deactivation in the repeated hydrotreatments of asphaltene in petroleum residues, coal liquids and their mixture was comparatively studied in the single- and two-stage reactions, using the same commercial Ni-Mo/Al{sub 2}O{sub 3} catalysts in the batch autoclave. The less catalyst deactivation as well as higher performances in the denitrogenation (>80%) and upgrading of coal liquid were obtained in the two-stage hydrotreatment of 390{degree}C-2h and 430{degree}C-2h. The increase of the catalyst weight which causes the decrease of the activity was considerably less in the two-stage reaction. The two-stage hydrotreatment, which allows a combination of best catalysts in the respective stages under most appropriate conditions for their best performances, can be further effective in the upgrading of heavy residual hydrocarbons." @default.
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- W24919794 date "1988-06-01" @default.
- W24919794 modified "2023-09-27" @default.
- W24919794 title "Catalysts deactivation during the hydrotreatment of heavy oils" @default.
- W24919794 hasPublicationYear "1988" @default.
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