ADVANCED TECHNOLOGY SOLUTIONS FOR TREATMENT AND CONTROL NOXIOUS EMISSION OF LARGE MARINE DIESEL ENGINES: A BRIEF REVIEW

Large marine diesel engines use low-quality fuel, significant sulfur content, when conducting combustion with air in the combustion chamber will emit different combustion products. The main components of air pollution in diesel exhaust include NOx, SOx, CO, HC, and PM. The amount of NOx, CO, SOx, and HC in the emission from the internal combustion engine up to 50%. These pollutants directly affect human health and the environment. The World Maritime Organization (IMO) has introduced the mandatory standards in Annex VI of MARPOL 73/78, to regulate the standard of toxic substances in diesel emissions. Many technology solutions are being applied by Man B&W, Wartsila, Mitsubishi, Yanmar, Weichai, MTU, Carterpillar ... to treat and control toxic gases from marine diesel engines. The article provides an overview of environmental pollution caused by NOx, SOx and HC in exhaust emissions from marine diesel engines, and also provides advanced technology solutions by significant engine manufacturers in the world that have used to minimize noxious emissions of marine diesel engines. Moreover, the author provides and evaluates the solutions applied to Vietnam's inland waterway fleet to enhance the control of toxic emissions, ensuring the mandatory standards in Annex VI of the MARPOL Convention.