Liquefied petroleum gas (LPG) is the liquefied version of petroleum gases made of hydrocarbon compounds that consist of propane and butane. It is convenient for storage and transportation. In general, fuel oil is used for large vessels and diesel for small-sized ships. However, such fuel types emit a lot of greenhouse gases.
Despite LPG's environmentally-friendly characteristics, it was not frequently used for small and medium-sized ships due to safety issues. Because LPG is combustible, it is not suitable to operate small ships. Fuel tanks for LPG are also excessively bulky so they take up a large amount of space inside smaller vessels.
Busan City said on August 12 that the land demonstration for LPG-based vessel propellant systems will be conducted at the Korea Maritime & Ocean University starting on September 8. The maritime demonstration will be carried out on April 2022 after completing the land demonstration. The demonstration includes the construction and operation of an LPG engine generation hybrid-electric propulsion systems for medium-sized ships, the conversion and operation of LPG outboard motors for small ships, and the supply system of LPG fuel from the land to ships.
"Compared to diesel, LPG only produces about 50 percent of the nitrogen oxide and up to 90 percent of particulate matter," Busan's public relations official Hyun Jeong-hwan told Aju Business Daily. Hyun also said LPG, which has been used for vehicles for a long time, is more accessible than hydrogen.
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