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    Hydrotreating | Co-processing for diesel hydrotreating

    The first and simple step on your renewable diesel journey

    Co-processing provides an easy way for refineries to start their renewable journey. By replacing even low amounts of fossil feedstock with renewable feedstock, your refinery can produce renewable fuel – and take the first step towards becoming a biorefinery.

    How does it work?  

    Renewable feedstock can be introduced directly into your diesel hydrotreater with your fossil feed. The end-product will be a combination of renewable and fossil diesel. The renewable propane and methane will be released through the off-gases. 

    In most cases, up to 10% renewable feedstock can be added with limited or no equipment modifications. We do, however recommended installing a selective renewable grading and hydrodeoxygenation (HDO) catalyst for maximum yield and contaminant pick-up capacity. 


    For co-processing with more than 10% renewable feedstock, a revamp may be required, but this solution is still faster and with lower CAPEX than a grassroot unit. 


    Benefits of choosing renewable co-processing in your diesel hydrotreater for production of renewable fuel     

    • Limited or no revamp of plant required

    • Renewable grading and HDO catalyst can be included fast, e.g., by next turn-around or even sooner by skimming

    • It’s a low CAPEX solution

    • Easy implementation – no need to wait for 100% renewable grassroot unit

    • You can choose your own co-processing starting point  co-processing for diesel flow diagram

    Renewable feed in, renewable product out. This illustration of a hydrotreating unit with a splitter visualizes how introducing renewable feedstock into your unit enables your production of a mix of fossil diesel and renewable diesel. 

    Read more about co-processing for kerosene hydrotreating 

    Applications within this area

    Diesel Hydrotreating

    Our hydrotreating solutions offer you the opportunity to meet all legislative requirements when producing clean fuels, either from conventional crude oil, or from alternative feeds.

    FCC Gasoline Post-Treatment

    Optimize all the all steps in your FCC gasoline post-treatment applications with Topsoe’s specifically developed series of HyOctane™ catalysts.

    Kerosene Hydrotreating

    Topsoe’s high-performance catalysts and proprietary equipment enable you to generate the highest possible yield and value from your straight-run and cracked kerosene feeds.

    Naphtha Hydrotreating

    High demands to get more value out of heavier feedstocks present new challenges for catalysts and technology. Topsoe offers related solutions for downstream petrochemicals processing.

    Resid Hydrotreating

    Ensure long cycle lengths and maximum protection of downstream catalysts with Topsoe's hydrodemetallization (HDM) and hydrodesulfurization (HDS) catalysts.

    VGO Hydrotreating / FCC Pretreatment

    One of the keys to optimize the refinery margin is to have optimal fluid catalytic cracking (FCC) unit performance – both in terms of throughput, but also in terms of product slate.

    Co-processing in kerosene

    Use co-processing in your kerosene hydrotreating for production of Sustainable Aviation Fuel (SAF). Our TK-930 catalyst maintains highest possible biogenic carbon in the jet fuel.

    Co-processing for diesel hydrotreating

    Produce renewable and fossil diesel through co-processing of renewable feedstock. The renewable feed can be introduced directly into your diesel hydrotreater with your fossil feed.