Nickel & Vanadium Management

Nickel and vanadium are naturally present in Crude Oil and usually in fractions boiling over 500°C. Nickel and vanadium poisoning affect only VGO and resid hydrotreaters and hydrocrackers. Specific systems (Hyvahl™, PRS™) and catalysts have been developed by Axens for years to handle metal contamination in residues.


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Typically, the maximum level of nickel and vanadium allowable on VGO hydrotreating catalysts is in the range of 3 to 5 wt%. Because of the specific structure of the large molecules (porphyrin) containing nickel and vanadium, distinct demetalization catalysts must be used.  

In the case of resid hydroprocessing, the HF 858 catalysts combined with other products from the HF and HM series enable very high metal removal activity and very high metal retention. The maximum uptake of nickel + vanadium allowable on the hydrodemetalization catalyst can exceed 100 wt%.

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Due to new regulation on the market such as IMO or coke regulations, residue hydroconversion & hydroprocessing technologies become key technologies for VR upgrading.


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RDS units include a number of reactors in series, each with a dedicated function. These units require a tailored catalyst system characterized by three reaction zones where the types and quantities of each catalyst are determined as a function of the feedstock difficulty and the objectives of the unit.


Reactor Internals

In today’s complex environment, refineries and petrochemical plants around the world need advanced solutions to reach operational excellence. In units featuring fixed-bed reactors, the use of high-efficiency reactor internals are essential to help achieve this goal.


Catalyst Protection Systems

Impurities, fines, gums, scales and inorganic matter can be carried over with the feed. While catalyst performance is steadily increasing due to constant innovation, they are often more sensitive to poisoning.


Technical Support & Performance Management

Axens is fully committed to be your partner and provide assistance and support during your project lifecycle, from conception to start-up & running operations.


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