Measurement of sulfur-dioxide emissions from ocean-going vessels in Belgium using novel techniques

Van Roy, W.; Van Nieuwenhove, A.; Scheldeman, K.; Van Roozendael, B.; Schallier, R.; Mellqvist, J.; Maes, F.

doi:/10.3390/atmos13111756

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Measurement of sulfur-dioxide emissions from ocean-going vessels in Belgium using novel techniques

Van Roy, W.; Van Nieuwenhove, A.; Scheldeman, K.; Van Roozendael, B.; Schallier, R.; Mellqvist, J.; Maes, F. (2022). Measurement of sulfur-dioxide emissions from ocean-going vessels in Belgium using novel techniques. Atmosphere 13(11): 1756. https://dx.doi.org/10.3390/atmos13111756

In: Atmosphere. MDPI AG: Basel. ISSN 2073-4433; e-ISSN 2073-4433

Available in	Authors
VLIZ: Open access 384758 [ download pdf ]

Keyword

Marine/Coastal

Author keywords

airborne compliance monitoring; MARPOL Annex VI; SECA; scrubbers; sulfur-dioxide

Authors		Top
Van Roy, W. Van Nieuwenhove, A. Scheldeman, K. Van Roozendael, B.	Schallier, R. Mellqvist, J. Maes, F.

Abstract

Air pollutants emitted by ocean-going vessels (OGVs) cause numerous environmental and human health problems. In 2016, the Belgian Coastguard aircraft was equipped with a sniffer sensor to monitor compliance with MARPOL Annex VI Regulation 14. However, the sensor was susceptible to NO and Volatile Organic Compounds (VOCs), which had a negative impact on the measurement uncertainty. The elimination of measurement errors was achieved by modifying the sensor, including among others the addition of a NO_x sensor and a custom-designed hydrocarbon kicker. This resulted in a substantial improvement in the measurement quality and uncertainty of the derived Fuel Sulfur Content (FSC). As a direct result of this, the reporting thresholds for non-compliance drastically improved. The data analysis of sampled OGVs showed that compliance levels notably improved between 2019 and 2020 (from 95.9% to 97.3%), coinciding with the implementation of the Global Sulfur Cap. Findings in this study have also demonstrated that OGVs equipped with emission abatement technology (scrubbers) are more susceptible to non-compliance with Regulation 14 of MARPOL Annex VI. Given these results, this article provides an answer to the question of how to monitor effective implementation of NO emissions from OGVs.

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