Emission monitoring

ABB has the right gas analyzer portfolio to allow vessels to stay compliant with current and upcoming regulations.

Emission monitoring for clean air on oceans brings maritime air pollution control closely in line with shore-based power plants, cement works and oil refineries, where continuous emissions monitoring systems (CEMS) have been used for decades. As from the 1 January 2020, the low sulphur emission limits in the IMO regulations became effective worldwide.

The measurement requirement The International Maritime Organization (IMO) set out the MARPOL Annex VI regulations aiming to control the main air pollutants emitted by vessels. These regulations focus on the control and reduction of sulphur oxides (SOx) and nitrous oxide (NOx) emissions:
• Regulation 14 for control and monitoring of SOx emitted by the combustion of heavy fuel oil (HFO) engines
• Regulation 13 for control of NOx emitted by the combustion of diesel engines SOx control guidelines are specified in the MEPC.259 (68). They apply in all Emission Control Areas (ECAs) starting January 1, 2015 on and have started in 2020 globally.

In order to control the efficiency of exhaust gas cleaning systems (EGCS) and following MEPC.259 (68), measurement of SOx/CO₂ ratio is required. The NOx Technical Code (NTC) 2008 specifies the measurement performance of a CEMS on board of a vessel. The currently measured gases are:

• nitrogen oxides (NOx)
• sulphur oxides (SOx)
• carbon dioxide (CO₂)



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