Reduction of gaseous emissions from ships. Comparative overview of methods and technologies

This paper develops a methodology for the systematic estimation of the annual emission of a commercial ship and its environmental costs. By integrating the abatement methods for the ship in the process, it is possible the estimation of the environmental benefit of emission reduction options, taking into account the operational range of the ship and looking for the best investment option, for both social and ship-owner viewpoints. Finally, the procedure will provide with the classical indicators of cost-benefit and cost-revenue analyses, such as Net Present Value (NPV), Internal Rate of Return (IRR) and Pay-Back Period (PBP).