Chemical tanker · Liberia flag · built 2017
CTG MERCURY: CO₂ emissions 2018–2025
IMO 9739329 EU ETS8 reporting years
- CO₂ reported 2025
- 13,934 t
- Fuel burned
- 4,471 t
- Distance
- 55,613 nm
- Time at sea
- 4,628 h
- Emitted at berth
- 5% of total
- Share of year under way
- 53%
- Gross tonnage
- 17,139
CTG MERCURY against its type
Built in 2017, it is 7 years newer than the median chemical tanker on this register, which was built in 2010 (1,951 vessels with a known build year). At 17,139 gross tonnage it is smaller than 59% of the other 1,899 chemical tankers with a recorded tonnage. It is one of 402 chemical tankers here under the Liberia flag, 17.2% of the 2,344 on the register. The same builder is recorded for 40 other vessels here, 32 of them chemical tankers. Its MRV returns name it CTG MERCURY for 2018–2019 and STOLT MERCURY for 2020–2025. The reported port of registry changed: Majuro (2018–2019), then MONROVIA (2020–2025).
Its 13,934 t of CO₂ for 2025 is 2.5 times the median of 5,531 t among the 1,484 chemical tankers on this register that reported for 2025. Per nautical mile it emitted 250.6 kg CO₂, close to the type median of 250.2 kg. It logged 4,628 hours at sea against a median of 2,106 hours for its type that year. 4.7% of its 2025 emissions were at berth; the median for chemical tankers was 6.6%. Across 8 years with reported emissions, the highest was 2025 (13,934 t) and the lowest 2022 (2,149 t). Its efficiency percentile within the type went from 36 in 2018 to 39 in 2025 (lower is more efficient). Of the 8 sister ships listed below with a 2025 return, 8 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2018–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 13,934 | 4,471 | 55,613 | 4,628 | 659 | 250.6 | 12.5 | 39 |
| 2024 | 9,056 | 2,890 | 38,580 | 3,199 | 597 | 234.7 | 12.9 | 38 |
| 2023 | 7,195 | 2,295 | 29,393 | 2,412 | 605 | 244.8 | 15.0 | 48 |
| 2022 | 2,149 | 688 | 9,590 | 928 | 60 | 224.1 | 20.9 | 69 |
| 2021 | 5,613 | 1,796 | 25,281 | 2,180 | 327 | 222.0 | 10.6 | 18 |
| 2020 | 6,761 | 2,137 | 26,393 | 2,232 | 503 | 256.1 | 17.4 | 59 |
| 2019 | 5,823 | 1,858 | 21,127 | 1,929 | 165 | 275.6 | 19.6 | 64 |
| 2018 | 3,915 | 1,252 | 15,816 | 1,339 | 190 | 247.6 | 13.7 | 36 |
Vessel particulars
- IMO number
- 9739329
- Previously reported as
- STOLT MERCURY
- Ship type
- Chemical tanker
- Gross tonnage
- 17,139
- Length overall
- 165.1 m
- Year built
- 2017
- Flag state
- Liberia per EU MRV 2025
Sources disagree: Wikidata/AIS (undated) list Marshall Islands. The flag shown is from the newest official source, the EU MRV return for 2025. - Builder
- AVIC Dingheng Shipbuilding
- Port of registry
- Monrovia MRV 2025
- Technical efficiency (design)
- EEXI (6.17 gCO₂/t·nm)
- Verifier
- DNV, Germany
- Accreditation
- VS-16026-01
- Compliance document issued
- 2026-02-18
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 525 of 1,348 qualifying chemical tankers by EEOI, at the 39th percentile. The dashed line is the type median, 14.4; this vessel reported 12.5.
EEOI divides emissions by transport work, which for this vessel and year was 1,118,281,701 tonne-miles over 55,613 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 255.9% higher than in 2018, for EU/EEA voyages only.
From 2024 to 2025, emissions rose 53.9% while distance sailed rose 44.1%and CO₂ per nautical mile rose 6.7%.That points mainly to how much the vessel sailed, rather than the other.
Where the 2025 emissions occurred
Methane, nitrous oxide and EU ETS2025
- Total CO₂ equivalent
- 14,153 t
- Methane (CH₄)
- 0.22 t
- Nitrous oxide (N₂O)
- 0.80 t
- Under EU ETS
- 7,324 t, 53% of total
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2018 | AMERICAN BUREAU OF SHIPPING HELLENIC SINGLE MEMBER LIMITED LIABILITY COMPANY (ABS HELLENIC S.M. LTD) | Greece |
| 2021 | DNV | Germany |
A change of verifier is not in itself a sign of anything being wrong.
Sources and how to read this
- Emissions: EU MRV publication (THETIS-MRV), reporting years 2018–2025, published by the European Commission.
- Vessel particulars: Wikidata (CC0).
This page draws on 8 MRV reporting years, an efficiency ranking, 5 of 5 vessel particulars and a name history. Not found in the sources for this vessel: AIS movements in Norwegian waters, a licensed photograph, a sanctions listing and US port state inspections.
Empty means unreported, never zero. How EEOI, distance, percentiles and sister ships are handled is explained under reading a vessel page. Something wrong? See corrections.