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Hydrotreating | Resid hydrotreating

Traditionally, the primary objective in resid hydroprocessing was production of low-sulfur fuel oil (LSFO); i.e. desulfurization was the main objective. With the market for residual oil declining, and the demand for light transportation fuels on the rise, refiners can profit from converting resid into gasoline and diesel fuel. One important route for the conversion of resid into lighter transportation fuels is a combination of hydrotreating and resid fluid catalyst cracking (RFCC). Obviously, the demands on the catalyst system vary according to the processing objectives and will affect the choice of catalysts to be installed in the unit.

Topsoe offers a range of fixed-bed resid hydrotreating catalysts for plants wanting to produce either LSFO or pretreated feed for an RFCC unit. Our hydrodemetallization (HDM) and hydrodesulfurization (HDS) catalysts deliver outstanding metals pickup and hydrogenation activity, ensuring long cycle lengths and maximum protection of downstream catalysts. It all adds up to more cost-effective compliance with product specifications and environmental standards.

Our resid hydrotreating catalysts can be divided into the following three functionalities:

  • Hydrodemetallization (HDM)
    • HDM catalysts protect the downstream catalysts from rapid deactivation caused by excessive amounts of nickel and vanadium. The HDM catalysts are especially designed for operating in guard reactors and/or the first part of the reactor train, where the concentration of metals in the feed is high. The unique pore system of the HDM catalysts ensures that metals accumulate deep within the pores, giving a high HDM activity and superior tolerance and capacity for metals deposition.
  • Transition
    • Transition catalysts are installed in the middle part of the reactor train for optimal protection of the HDS catalyst against deactivation caused by metals in the feed. Transition catalysts have properties in between those of HDM and HDS catalysts with respect to hydrogenation activity, metals pick-up capacity and metals tolerance.
  • Hydrodesulfurization (HDS)
    • HDS type catalysts are the work horses of the resid hydrotreating catalyst system with respect to hydrogenation of sulfur and nitrogen compounds and removal of Conradson Carbon Residue.

Determining the optimal ratios of each catalyst type is important for obtaining a long cycle length while meeting the desired product properties. The optimal ratio will vary from unit to unit and will depend strongly on feedstock properties, operating conditions, and product requirements.

Catalyst support

Catalyst support

Our Catalyst Support is designed to support the combined weight of the catalyst, support material ...

Inlet diffuser

Inlet diffuser

Our Inlet Diffusers are optimized and customized for every unit, taking into account all your ...

Scale catcher

Scale catcher

A common problem in hydroprocessing reactors, is pressure drop build-up caused by various particles ...

Outlet collector

Outlet collector

Our Outlet Collector ensures even flow distribution in the bottom bed to maximize catalyst ...

Quench mixer

Quench mixer

Our Quench Mixer ensures efficient mixing of catalyst bed effluents from both above and from the ...

Redistribution tray

Redistribution tray

Our Redistribution Tray ensures uniform redistribution of the mixer effluents to the catalyst bed ...

Distributor tray

Distributor tray

Our Vapor Lift Distributor Tray (VLT) ensures uniform distribution of liquid and gas over the ...

General Technical Service

Topsoe’s General Technical Service employs the full weight of our knowledge and experience to ...

Catalyst Loading

Topsoe’s Catalyst Loading service gives you valuable pre-loading and loading guidance that can help ...

Plant Assessment / Optimization

A Topsoe Plant Assessment/Optimization can identify and help you solve issues standing in the way ...

Sampling & Analysis

Our Sampling & Analysis service is your direct route to the detailed insight it takes to make ...

Troubleshooting

Our Troubleshooting service draws on the full range of Topsoe’s insight into catalysts, equipment ...

Start-up & Reduction / Activation

Our Start-up & Reduction/Activation service supports you before, during and after start-up to make ...

Project development

We facilitate all relevant contracts to meet both the debt and the equity financing requirements.

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Joan Legind Tiedje

Joan Legind Tiedje

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