The International Maritime Organization (IMO) also enacted "Regulations on Air Pollutant Emissions from Ships" to control the discharge of air pollutants from ships and decided to strengthen regulations on pollutants from ships, such as NOx, SOx and PM, from July 2010. The calorific value required for the thermal decomposition of urea was calculated through the heat balance method, and design was performed so that the capacity design of the burner, blower design, and line-up could be possible. It was judged in [6] that the direct injection of urea into the periphery (600-700K) of high temperature could have the effect of reducing the residence time of thermal decomposition and decreasing the thermal decomposition pipe length. We investigated on the thermal decomposition of urea solution at the temperature region between 400°C and 550°C at a decomposition burner chamber.

decomposition chamber, specific fuel consumption, selective catalytic reduction, mass heat balance, oil burner.