Characterization of Field Deterioration in V-Based SCR Catalysts Retrieved from an Operating Marine Vessel
- 1Automotive and Environmental Catalyst Development Team, Heesung Catalysts Corporation, Siheung 15088, Republic of Korea
- 2Division of Coast Guard, Mokpo National Maritime University, Mokpo 58628, Republic of Korea
Abstract
Marine selective catalytic reduction (SCR) systems are widely used to comply with stringent NOx emission limits, yet the long-term deterioration of catalysts under traceable real-world ship operation remains insufficiently documented. In this study, V-based SCR catalysts were recovered from the generator-engine SCR system of the training ship T/S SEGERO after approximately 1000 and 3600 h of actual vessel operation and compared with a fresh reference. The field-aged catalysts were evaluated by visual inspection, pressure-drop measurements, SEM–EDS, ICP-OES, N2 physisorption, and laboratory NH3-SCR activity testing. After 3600 h, localized carbonaceous and inorganic deposits were observed together with an approximately 9–18% increase in pressure drop relative to the fresh catalyst. Ca, P, and Zn accumulation increased with field exposure, while Ca and S showed spatial co-localization at the catalyst surface. The BET surface area decreased by approximately 10% after 1000 h and 35% after 3600 h. Relative DeNOx activity remained close to that of the corresponding fresh reference after 1000 h but was lower after 3600 h, with mean reductions of 8.3–13.3% in the first layer and 2.0–5.9% in the second layer across 300–400 °C. These results demonstrate the value of a training vessel as a traceable longitudinal platform for linking marine operating history with catalyst deterioration.
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BibTeX
@article{kim2026characterization,
title = {{Characterization of Field Deterioration in V-Based SCR Catalysts Retrieved from an Operating Marine Vessel}},
author = {Daekun Kim and Woo-Seok Jeon},
journal = {Catalysts},
year = {2026},
month = oct,
doi = {10.3390/catal16110973},
url = {https://www.mdpi.com/2073-4344/16/11/973},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Characterization of Field Deterioration in V-Based SCR Catalysts Retrieved from an Operating Marine Vessel
AU - Daekun Kim
AU - Woo-Seok Jeon
PY - 2026
DA - 2026/10/31
JO - Catalysts
DO - 10.3390/catal16110973
UR - https://www.mdpi.com/2073-4344/16/11/973
AB - Marine selective catalytic reduction (SCR) systems are widely used to comply with stringent NOx emission limits, yet the long-term deterioration of catalysts under traceable real-world ship operation remains insufficiently documented. In this study, V-based SCR catalysts were recovered from the generator-engine SCR system of the training ship T/S SEGERO after approximately 1000 and 3600 h of actual vessel operation and compared with a fresh reference. The field-aged catalysts were evaluated by visual inspection, pressure-drop measurements, SEM–EDS, ICP-OES, N2 physisorption, and laboratory NH3-SCR activity testing. After 3600 h, localized carbonaceous and inorganic deposits were observed together with an approximately 9–18% increase in pressure drop relative to the fresh catalyst. Ca, P, and Zn accumulation increased with field exposure, while Ca and S showed spatial co-localization at the catalyst surface. The BET surface area decreased by approximately 10% after 1000 h and 35% after 3600 h. Relative DeNOx activity remained close to that of the corresponding fresh reference after 1000 h but was lower after 3600 h, with mean reductions of 8.3–13.3% in the first layer and 2.0–5.9% in the second layer across 300–400 °C. These results demonstrate the value of a training vessel as a traceable longitudinal platform for linking marine operating history with catalyst deterioration.
SN - 2073-4344
ER -