Skip to content
Contact us
    Select language
    Topsoe’s two-stage HDS/HDA technology

    Topsoe’s two-stage HDS/HDA technology

    Checkmark

    Maximized yield at lower cost

    Checkmark

    Optimized operating conditions and catalyst loading

    Checkmark

    Benefit from 85 years of commercial experience

     

     

    Intelligent integration

    Refiners have to contend with increasingly stringent specifications for diesel fuel, while increasing production of diesel products from difficult feedstocks.
    Topsoe’s hydrotreating solutions help refiners process even hard-to-process or alternative feeds, while meeting stringent emissions and clean fuel product requirements. We can also optimize your operating conditions and catalyst loadings to cut investment costs and utility consumption.

    Topsoe’s dearomatization technology and catalysts (HDA) are especially well-suited for treating heavy feedstocks to produce distillates with lower sulfur and aromatics levels, reduced density, or a higher cetane number. Our two-step process has a HDS stage for sulfur and nitrogen removal, followed by a HDA stage for removing polyaromatics and reducing the aromatic content.

    Reduce aromatics content – increase cetane number

    Topsoe was among the first to introduce the two-stage HDS/HDA technology and catalysts for deep dearomatization of gas oil feedstocks and manufacturing ultra-clean diesel fuels. Our process is currently operating in several industrial units worldwide and has a proven track record for reliability and stability.

    The first stage of this process is similar to Topsoe's conventional hydrotreating scheme. In this stage, deep HDS and HDN take place using a base metal catalyst. The effluent from the first reactor is sent to a stripper, which removes H2S and NH3 from the liquid hydrocarbon, exiting at the bottom of the stripper. It is very important that the hydrocarbon liquid is free of H2S, as it acts as a poison for the noble metal catalyst in the 2nd stage.

    The overhead vapor from the stripper containing H2S, NH3, and light ends passes through an amine wash to remove impurities from the hydrogen-rich gas. The hydrogen stream is used as treat gas in the HDA stage, where noble metal catalysts saturate aromatics in the distillate from the stripping column. This stage dramatically reduces the aromatics content of the diesel product and raises the cetane number. Commercial operation has proven designs with less the 3 wt% aromatics and cetane number increase of more than 11.

    Lowering the cost of maximizing yields

    The novel two-stage process from Topsoe is field-proven to cut investment costs and ongoing energy consumption. For more information, please contact Topsoe.

    Definition

    Catalysts

    Catalysts can accelerate chemical reactions, control selectivity, and reduce energy requirements. Their ability to optimize process efficiency and product quality make them indispensable in industrial processes.

    Definition

    Outputs

    The output is the result or end product you're looking to get out of your refinery or chemical process. The output helps determine which technologies and catalysts you need.

    Take a deeper look

    SAF Airplane runway[1]-1 1

    Sustainable Aviation Fuel

    As a direct replacement for conventional fuel, SAF is an easy decarbonization measure that will help the aviation industry decarbonize immediately.

    SOEC-2

    Power-to-X

    To lower emissions in energy-intensive industries and long-distance transportation, we need technologies such as electrolysis in Power-to-X processes technology.

    Marathon-1-2-1

    Renewable fuels

    Renewable fuels will help us decarbonize heavy-duty transportation, and we’ll need proven technologies for their production. Luckily, these already exist.

    TOPSOE employees at refinery 2

    Hydrogen

    The abundance of hydrogen coupled with its potential for sustainable methods of production, positions it as a promising solution in the global energy transition. 

    Topsoe Ammonia converter-1-1

    Ammonia

    Ammonia is considered a gamechanger in decarbonizing the maritime industry and other energy-intensive industries where direct electrification is not an option.

    bofu-cta-row-image bofu-cta-row-image

    Contact us

    Do you have a question about our products or solutions? Or do you want to know how our technologies can support your business? Contact our experts today.