A dual fuel combustion system developed by Oak Ridge National Laboratory (ORNL) in partnership with Caterpillar Inc. tackles the issue of methanol ignition in diesel engines, particularly for inland and coastal marine vessels. Methanol, typically derived from abundant natural gas, is easier to store in liquid form, but its low ignition propensity poses challenges for compression-ignition engines.
ORNL’s innovative approach combines methanol with a small quantity of diesel as a pilot fuel, facilitating methanol dual fuel operation across a broader range of conditions. This system enables marine engines to utilize over 75 percent methanol without compromising performance, according to Derek Splitter, the project lead at ORNL.
While implementing this system would necessitate engine modifications, it avoids the need for a complete redesign. Engines can operate on either diesel or dual-fuel methanol, offering flexibility and efficiency in fuel usage. This advancement holds significant promise for enhancing the sustainability of marine operations.
