Exhaust gas purification

SCR (Selective Catalytic Reduction) technology is used to reduce nitrogen oxide emissions in exhaust gases. Across TUI Cruises' fleets, these systems are deployed worldwide in all port and coastal regions, regardless of regulatory requirements. The catalytic converters used reduce nitrogen oxide emissions to IMO Tier III levels.

The exhaust gas after-treatment system (AEP = Advanced Exhaust Gas Purification) used on the Mein Schiff® fleet (Mein Schiff 1 through Mein Schiff 6) combines a desulfurization unit (hybrid scrubber) with SCR (Selective Catalytic Reduction) catalysts.

The scrubber removes sulfur components and particulates from the exhaust gases. The resulting wash water is treated, while the separated residues are collected and transferred to shore-based disposal facilities. Depending on the sailing area, the system can be operated in either open-loop or closed-loop mode. In closed-loop operation, the wash water is collected on board and subsequently transferred to shore-based disposal facilities; in this mode, no wash water is discharged into the water.

Hybrid scrubber systems for exhaust gas cleaning are used worldwide on the Mein Schiff 1 through Mein Schiff 6 vessels. These systems are configured to reduce the sulfur content in the exhaust gas to a maximum of 0.1 percent—even outside designated Sulfur Emission Control Areas (SECAs). Outside of SECA zones, a global sulfur limit of 0.5 percent currently applies.

In the Baltic Sea as well as in port and coastal regions, the systems operate in closed-loop mode. The resulting wash water is collected on board in these areas and handed over to specialized onshore facilities for disposal.