Catalyst Production and Operation

Hydrotreating catalysts are usually produced by impregnating preformed y-alumina supports with aqueous solutions of ammonium molybdate. Particles are then dried and calcined. Molybdenum oxide forms a uniform surface layer on the alumina by reaction with the sirrface hydroxyl groups. It is important that the surface area of the alumina is consistent with the amount of molybdenum oxide required for the hydrotreating catalyst specification (typically 1 wt% M0O3 = 12 

Regeneration interval 1-3 years 1—2 years 1 year 0.5—1 year 

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