Chemical tanker · Liberia flag
BW SILICON: CO₂ emissions 2019–2025
IMO 9829681 EU ETS7 reporting years
- CO₂ reported 2025
- 5,458 t
- Fuel burned
- 1,746 t
- Distance
- 26,681 nm
- Time at sea
- 2,379 h
- Emitted at berth
- 12% of total
- Share of year under way
- 27%
BW SILICON against its type
It is one of 402 chemical tankers here under the Liberia flag, 17.2% of the 2,344 on the register. Its MRV returns name it BW SILICON for 2019 and CHEM SILICON for 2020–2025. The returns for 2020–2025 all give Monrovia as port of registry.
Its 5,458 t of CO₂ for 2025 is close to the median of 5,531 t among the 1,484 chemical tankers on this register that reported for 2025. Per nautical mile it emitted 204.6 kg CO₂, 18% below the type median of 250.2 kg. It logged 2,379 hours at sea against a median of 2,106 hours for its type that year. 11.7% of its 2025 emissions were at berth; the median for chemical tankers was 6.6%. Across 7 years with reported emissions, the highest was 2022 (8,599 t) and the lowest 2020 (3,983 t). Its efficiency percentile within the type went from 26 in 2019 to 46 in 2025 (lower is more efficient). Of the 6 comparable vessels listed below with a 2025 return, 0 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2019–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 5,458 | 1,746 | 26,681 | 2,379 | 639 | 204.6 | 13.7 | 46 |
| 2024 | 5,842 | 1,858 | 30,329 | 2,566 | 287 | 192.6 | 13.3 | 39 |
| 2023 | 6,225 | 1,974 | 32,409 | 3,318 | 562 | 192.1 | 14.0 | 42 |
| 2022 | 8,599 | 2,740 | 45,684 | 4,060 | 320 | 188.2 | 12.6 | 34 |
| 2021 | 7,569 | 2,418 | 39,496 | 3,397 | 286 | 191.6 | 14.2 | 39 |
| 2020 | 3,983 | 1,252 | 19,140 | 1,713 | 438 | 208.1 | 16.2 | 53 |
| 2019 | 5,248 | 1,677 | 31,856 | 3,136 | 315 | 164.7 | 12.2 | 26 |
Vessel particulars
- IMO number
- 9829681
- Previously reported as
- CHEM SILICON
- Ship type
- Chemical tanker
- Flag state
- Liberia per EU MRV 2025
- Port of registry
- Monrovia MRV 2025
- Home port
- Monrovia
- Technical efficiency (design)
- EIV (8.07 gCO₂/t·nm)
- Verifier
- NORMEC VERIFAVIA SAS, France
- Accreditation
- 3-2127
- Compliance document issued
- 2026-03-17
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 619 of 1,348 qualifying chemical tankers by EEOI, at the 46th percentile. The dashed line is the type median, 14.4; this vessel reported 13.7.
EEOI divides emissions by transport work, which for this vessel and year was 398,962,719 tonne-miles over 26,681 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 4.0% higher than in 2019, for EU/EEA voyages only.
From 2024 to 2025, emissions fell 6.6% while distance sailed fell 12.0%and CO₂ per nautical mile rose 6.2%.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
- 5,544 t
- Methane (CH₄)
- 0.09 t
- Nitrous oxide (N₂O)
- 0.31 t
- Under EU ETS
- 3,020 t, 55% of total
Verifier history
| From reporting year | Verifier | Accredited in |
|---|---|---|
| 2019 | AMERICAN BUREAU OF SHIPPING HELLENIC SINGLE MEMBER LIMITED LIABILITY COMPANY (ABS HELLENIC S.M. LTD) | Greece |
| 2020 | NORMEC VERIFAVIA SAS | France |
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 2019–2025, published by the European Commission.
This page draws on 7 MRV reporting years, an efficiency ranking, 1 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.