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A New Method for Reactivation of Supported CoMo/Al2O3 and NiMo/Al2O3 Catalysts of Deep Hydrotreating after Oxidative Regeneration
https://doi.org/10.18412/1816-0387-2015-3-29-35
Abstract
A new method for reactivation of CoMo/Al2O3 and NiMo/Al2O3 catalysts for deep hydrotreating of diesel fuel after their oxidative regeneration consists in the impregnation of regenerated catalysts with an aqueous solution of chelating compounds (e.g. citric or oxalic acids, ethylene glycol or diethylene glycol) followed by drying. After such treatment, the activity of reactivated catalysts can exceed the activity of fresh samples. The activity of the catalyst IK-GO-1 in the hydrotreating of straight run diesel fuel was studied in dependence on the nature and amount of an added chelate. The best results were obtained by treating the oxidized sample with a solution containing both citric acid and a glycol at an optimum molar ratio (0,5–1,0) of the sum of chelating compounds to the sum of metals. The catalysts reactivated in this way give diesel fuels with ultra low (10 ppm) sulfur content. At that, with the use of the reactivated catalysts, the starting temperature of hydrotreatment is 10–15 °C lower than the temperature provided by the catalysts after oxidative regeneration and is 3–4 °C lower than the temperature provided by the fresh catalysts.
About the Authors
S. V. Budukva
Boreskov Institute of Catalysis, SB RAS, Novosibirsk
Russian Federation
Russian Federation
O. V. Klimov
Boreskov Institute of Catalysis, SB RAS, Novosibirsk
Russian Federation
Russian Federation
A. S. Noskov
Boreskov Institute of Catalysis, SB RAS, Novosibirsk
Russian Federation
Russian Federation
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Review
For citations:
Budukva S.V., Klimov O.V., Noskov A.S. A New Method for Reactivation of Supported CoMo/Al2O3 and NiMo/Al2O3 Catalysts of Deep Hydrotreating after Oxidative Regeneration. Kataliz v promyshlennosti. 2015;15(3):29-35. (In Russ.) https://doi.org/10.18412/1816-0387-2015-3-29-35
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