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

  • High yield

    • Two stage process has a higher diesel yield versus a single stage process.
    • BIDW dewaxing catalyst has exceptional ability at deep delta cloud to retain diesel product and avoid cracking.

  • Operating flexibility

    • Two stage process design allows for separate control of hydrotreating and dewaxing operations.
    • A separate hydrotreating step enables better control, optimization, and flexibility compared to a single stage process, with the ability to remove contaminants before the dewaxing catalyst.

  • Efficient process design

    • BIDW dewaxing catalyst has a high selectivity to isomerization, which consumes less H2 than cracking.

    • Improved process design, unit operations, and technical support when hydrotreating and dewaxing operations are provided by a single solution provider.



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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