• 2023 December 10 15:27

    ORNL, Caterpillar collaborate to advance methanol use in marine engines

    Research will be conducted on Caterpillar’s in-line 6-cylinder marine engine that has been modified for methanol use and installed at DOE’s research center at ORNL

    The Department of Energy’s Oak Ridge National Laboratory and Caterpillar Inc. have entered into a cooperative research and development agreement, or CRADA, to investigate using methanol as an alternative fuel source for four-stroke internal combustion marine engines. The collaboration supports efforts to decarbonize the marine industry, a hard-to-electrify transportation sector, ORNL said in its news release.

    As the United States continues to seek ways to reduce environmentally harmful greenhouse gas, or GHG emissions, methanol is an attractive fuel alternative to diesel because it reduces carbon emissions. Methanol also reduces emissions of nitrogen oxides and sulfur oxides. In addition, methanol’s relatively high energy density makes it easier to store on marine vessels than gaseous fuels meaning it can be more easily integrated into overall existing engine design and operation.

    Although methanol has many advantages, it is more difficult to ignite than diesel. Under the terms of the CRADA, ORNL researchers will work with Caterpillar over the next few years to identify, develop and test hardware configurations and operating strategies required to maximize use of methanol in engines retrofitted for methanol.

    Research will be conducted on Caterpillar’s in-line 6-cylinder marine engine that has been modified for methanol use and installed at DOE’s National Transportation Research Center at ORNL. New engine designs will also be considered, and several engine combustion strategies will be explored including dual-fuel, dimethyl ether reforming and spark-ignited prechambers. Caterpillar will support ORNL by providing additional materials and research expertise to enable engine performance, efficiency and durability while reducing GHG and other emissions.

    “We look forward to working with Caterpillar to develop near-term combustion strategies that can be retrofitted on existing engines to realize immediate reductions in carbon emissions. We also will develop long-term combustion strategies for new engine technologies that achieve 100% displacement of diesel fuel with methanol,” said ORNL’s Jim Szybist, section head for Propulsion Science. “The research we conduct over the next few years will be a significant contributor to decarbonization efforts globally.”

    The project supports DOE’s Vehicle Technologies Office’s focus on reducing GHG emissions from off-road vehicles such as railway, aviation and heavy transportation vehicles used in agriculture, construction, mining and marine vessels. These sectors are significantly more challenging to decarbonize than on-road, light-duty transportation applications and require unique solutions.

    “Caterpillar is proud to be working with ORNL as we develop the technology for a lower carbon future. Our marine customers across the U.S. have been clear that methanol will play a key role in their journey to net-zero emissions. The maritime industry has unique challenges that can’t necessarily be met by technologies being developed for other transportation sectors, so it is important to have this collaboration with ORNL to accelerate the technology and set the path for the future,” said Brad Johnson, vice president of Caterpillar Marine.

    In addition to DOE’s Vehicle Technologies Office, the collaboration is funded by the U.S. Department of Transportation Maritime Administration.

    UT-Battelle manages ORNL for the Department of Energy’s Office of Science, the single largest supporter of basic research in the physical sciences in the United States. The Office of Science is working to address some of the most pressing challenges of our time.




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