Progress of ship exhaust gas control technology

Ship emissions problems caused by the rapid development of maritime trade can't be ignored. The NOX, SOX, CO2, PM and other toxic substances contained in the exhaust gas are extremely harmful to the environment and human health. In order to cope with the adverse effects of ship emissions and the increasingly stringent emission regulations formulated by the IMO and governments, the shipping industry needs to adopt new clean energy and high-efficiency exhaust control technologies to reduce ship emissions. This paper provides a comprehensive review, including: (1) The impact of pollutants such as NOX, SOX, CO2 and PM emitted by ships on the environment and human health; (2) New regulations about ship exhaust emissions; (3) Application of clean energy such as LNG, biodiesel, methanol, hydrogen and ammonia on ships; (4) After-treatment technology of ship exhaust gas such as SCR and EGR. And focusing on the principles, uses, characteristics, implementation obstacles and prospects of different energy and technologies, with a view to provide some help for the research on ship exhaust emissions control. [Display omitted] •Introduced in detail the impact of NOX, SOX, CO2, PM and other ship emissions on human health and the natural environment.•Summarizes the progress of IMO and China's regulations on ship emissions in recent years•The emission control strategies for NOX and SOX are systematically discussed.•The application of clean energy such as LNG, biodiesel, methanol, hydrogen and ammonia in ships are emphatically introduced.