Introduction of Products > Marine/land engine catalyst > SCR catalyst
Having a SCR catalyst technology to cope with the IMO Tier-III NOx emission regulation, the Heesung Catalyst has product groups by temperature region for marine large diesel engines. In addition, the Heesung Catalyst supplies various catalysts using a SCR catalyst technology according to the product lineups and operation regions that can cope with various fuels from MGO to HFO and can be applied to medium-size engines as well.
Located after the TC, the LP-SCR has an advantage of being easy to install according to this, but has a disadvantage that the catalyst performance drops according to the low temperature operation and that the performance drops as time passes due to SO2 and NH3. The Heesung Catalyst supplies a commercialized 2Stroke LP-SCR catalyst by introducing a low temperature performance enhancement/reproduction system and a urea decomposition system to solve this.
The HP-SCR is located between the engine cylinder and the turbo charger, where the temperature of exhaust gases is high, to avoid the low-temperature operation condition of LP-SCR. This has an advantage that general SCR catalysts can be used because the SCR operation temperature is secured, but has a disadvantage of being difficult to install in a narrow space or for engines with worry of turbo charger contamination or with many T/Cs. The Heesung Catalyst supplies 2stroke HP-SCR catalysts stably by overcoming this technical disadvantage.
The 4stroke LP-SCR catalyst can be used without big problem even though it is installed after T/C because the temperature of engine exhaust gas is high in general, so the Heesung Catalyst supplies catalytic systems using bypass and reproductive systems, especially custom-designed 4stroke LP-SCR catalysts according to the exhaust gas temperature and the sulfur(S) content in fuel, by considering the cases of low exhaust gas temperature depending on engines in addition to this.