Dear Colleagues,

Green technologies are essential for sustainable development and the prevention of global warming. As for cargo shipping at sea, fossil fuels will soon no longer be used. We need to develop novel marine fuels and marine diesel engines. The prevention of biofouling on a ship’s hull is also an important technology to reduce fuel consumption. In this Special Issue, the current status of such technology will be summarized.

(1) Overall outline

• Focus

The focus of this Special Issue is on novel marine fuels not containing carbon molecules, the development of marine diesel engines for such novel and alternative fuels, and marine paint technologies, etc.

• Scope

Sea-borne transport systems such as marine diesel engine development, alternative marine fuels, and hull smoothing technologies, etc., are in the scope of this Special Issue.

• Purpose of the Special Issue

The target of zero emissions of CO₂ is being applied to marine transportation. By examining progress in this field, we contribute to the prevention of global warming and climate change.

(2) How the issue will usefully supplement (relate to) the existing literature.

Sustainable development is a major topic in relation to the prevention of global warming. The combustion of fossil fuels in marine diesel engines is essential for the propulsion of ships, and the emission of CO₂ contributes to global warming. The only way to stop CO₂ emissions from ships is to change the fuel. During the transition period, gas engines that use methane will be used. Further development of smoothing technology of the hull surface will contribute to the reduction in fuel consumption. In order to continue marine transportation beyond 2030, antifouling technologies, alternative fuels, engine development, and the development of solar panels, storage batteries, and motor drive systems, etc., will become major interests in research.

Prof. Haruo Mimura
Guest Editor

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• prevention of hull biofouling
• biofuel
• reduction in CO₂ emissions
• prevention of global warming
• liquid hydrogen transport at sea
• ammonia as a fuel
• ammonia combustion