Ship Emissions Monitoring

Container ship

The tightening of the environmental regulations has generated a need for cost-effective ship emissions monitoring. Since January 2015, the ships have been forced to use low sulphur content fuel (< 0.10% m/m) in Sulphur Emission Control Areas (SECAs), which include the Baltic Sea, the North Sea, most of US and Canadian coasts and coastal waters of Puerto Rico and US Virgin Islands. In other sea areas, a 0.50% m/m limit in the sulphur content of the fuel will be introduced in January 2020. A typical cargo ship can save up to 12 000 euros per day by using illegal high sulphur fuel, which gives a competitive disadvantage for companies obeying the law. In addition to sulphur oxides (SOx), more components are needed in the future including oxides of nitrogen (NOx), ammonia and methane.

Currently, the emissions monitoring is done by authorities by taking a sample from the fuel tank and sending it to a lab for analysis. Real-time, comprehensive and reliable emissions monitoring solutions are required for functioning ship emissions control instead of collecting fuel samples. However, the current regulative emission monitoring technologies are not simultaneously sensitive and cost-effective enough to be used in remote sensing of the emissions nearby seaways as every gas component requires a separate analyzer.

In order to calculate the sulphur content in the fuel used by a ship, the carbon dioxide (CO2) and sulphur dioxide (SO2) levels from the ship’s emissions have to be detected accurately. From these detected levels, the ratio of the gases is calculated, which can be used to finally determine the sulphur content in the fuel used by the ship using a formula stated in MARPOL Annex VI. GASERA ONE multi-gas analyzer is a cost-effective and sensitive way to analyze SO2 and CO2 levels simultaneously from the ship emissions accurately and multiple units can be stacked for synchronized measurement of further required gas compounds.