Evolving and regionally diverse fuels regulations are helping to drive demand for renewable diesel made from bio-feedstocks. One challenge when converting vegetable oils and fats into renewables diesel is the high cloud point of n-paraffins, making selection of the right process technology and dewaxing catalyst critical for meeting diesel cold flow specifications.

ExxonMobil offers EMRD™, a proprietary process technology, and BIDW™, a proprietary bio-dewaxing catalyst, to produce renewable diesel from bio-feedstocks. When combined they offer a range of benefits that can help refiners enhance renewable diesel production, while helping to meet stringent seasonal product specifications.

Key Benefits

  • EMRD™ process technology configuration

    • Stage 1

    Hydrodeoxygenation (HDO) step to convert triglycerides to n-paraffins.

    • Stage 2

    Selective isomerization of the n-paraffins to iso-paraffins to improve cold flow properties.

    • Catalyst

    The EMRD™ process utilizes ExxonMobil’s

    BIDW dewaxing catalyst suite.

  • Advantages

    • Two stage process provides flexibility to adjust operating conditions as needed for changing objectives.
    • Handles variations in product cold flow properties due to different feed types or to address new requirements.
    • Extended dewaxing catalyst lifetime due to customized conditions and contaminant control.
    • Potential to produce jet if fractionation is added.
    • EMRD process technology enables operational costs to be lowered through reduced hydrogen consumption in the dewaxing step due to the selectivity of BIDW™ to isomerization rather than cracking.
    • EMRD process technology meets operational requirements while minimizing equipment sizing and capital costs.
  • Services include

    • Initial consultations and proposal development.
    • Basic engineering package, including design specifications.
    • Technical support during FEED, and EPC stages.
    • Technology training, catalyst loading and start-up support.
    • Unit monitoring support.

EMRD™ process

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