Navalyze · Chemical tanker · Ship

STOLT SUN

IMO: 9149512
Type: Chemical tanker
Average cargo carried: 14,603 t
Flag (estimated): Cayman Islands
Port of registry: George Town
Fuel (estimated): Oil blended with biofuel or another alternative fuel

ISM company (DoC holder) in 2025: Stolt Tankers BV

Report year

2018 at a glance

From the 2018 THETIS-MRV report. Carries about 13,304 t of cargo on average.

Fuel kg/nm

94.5

Chemical tanker median 90.2 kg/nm (+5%)

CO₂ per transport work (cargo)

22.2

g CO₂/t·nm · Chemical tanker median 17.1 (+30%)

Average speed

12.1 kn

Chemical tanker median 10.1 kn (+20%)

Fuel per day at sea

27.4 t/day

Fuel consumed

3,016 t

CO₂ emitted

9,449 t

Distance sailed

31,934 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,637 h

110 days, 30% of the year

Within the chemical tanker fleet, 2025

Set against all 1,460 chemical tanker ships with a full-year 2025 report. Bigger ships burn more per mile but less per tonne of cargo, so read fuel per mile with the ship's size in mind.

Fuel kg/nmThis ship 81.5 kg/nm · median 79.7 (+2%)

52.8Ranks 780 of 1,460, lowest first111

Average speedThis ship 11.8 kn · median 11.1 (+6%)

8.8Faster than 73% of chemical tanker ships12.4

CO₂ per transport work (cargo)This ship 17.2 g CO₂/t·nm · median 15.0 (+14%)

7.93Ranks 826 of 1,460, lowest first40.2

Middle 80% of shipsMiddle 50%Chemical tanker medianThis ship

Where the emissions happen, 2018

THETIS splits each ship's CO₂ by voyage type. The split sets how much falls under the EU ETS: all of it within the EU and at berth, half of it on voyages into or out of the EU.

Between EU ports18%
From the EU23%
Into the EU50%
At berth in the EU9%

Fuel burned laden

–

Not reported

CO₂ at berth

880 t

9.3% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

–

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

–

CO₂eq on top of CO₂ alone, from CH₄ and N₂O

Over the years

Full-year reports only. The Chemical tanker median is the middle ship of all chemical tanker ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel kg/nm

STOLT SUN
Chemical tanker median

70.080.090.0100.0110.0

’182018’192019’202020’212021’222022’232023’242024’252025

Average speed, kn

STOLT SUN
Chemical tanker median

9.010.011.012.013.0

’182018’192019’202020’212021’222022’232023’242024’252025

CO₂ per transport work (cargo), g CO₂/t·nm

STOLT SUN
Chemical tanker median

15.020.025.030.0

’182018’192019’202020’212021’222022’232023’242024’252025

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	−0.1 kn	−4%	−5%	−27%	−25%	Same speed, fuel per mile down 4%; in line with the speed change.
2023→2024	−0.4 kn	−5%	−8%	+512%	+40%	0.4 kn slower, fuel per mile down 5%; in line with the speed change.
2022→2023	+2.9 kn	−5%	+25%	−86%	−37%	2.9 kn faster, fuel per mile down 5%; better than speed alone explains (hull, engine or trade).
2021→2022	−1.7 kn	−7%	−21%	−33%	+19%	1.7 kn slower, fuel per mile down 7%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	−1.4 kn	+5%	−7%	−6%	−4%	1.4 kn slower, fuel per mile up 5%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+0.4 kn	−0%	+3%	+5%	+0%	0.4 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2018→2019	+0.0 kn	+2%	+2%	+67%	+3%	Same speed, fuel per mile up 2%; in line with the speed change.

Fuel per mile rises roughly with the square of speed for a given ship, so a change in speed explains much of a change in fuel per mile.

Every reporting year

One row per THETIS-MRV report. A ship that changed operator during a year has a part-year report for each.

Operation

Year	ISM company	Fuel t	CO₂ t	Distance nm	Hours at seah	Average speedknots at sea	Fuel kg/nmthis ship	CO₂ per transport work (cargo)g/t·nm, this ship	Laden fuel
2025Bio blend	Stolt Tankers BV	1,754	5,404	21,529	1,828	11.8	81.5	17.2	–
2024	Stolt Tankers BV	2,522	7,876	29,658	2,490	11.9	85.0	22.9	–
2023	not published	434	1,357	4,847	394	12.3	89.6	16.4	–
2022	not published	3,303	10,358	35,105	3,738	9.4	94.1	26.1	–
2021	not published	5,341	16,776	52,525	4,741	11.1	102	22.0	–
2020	not published	5,426	17,020	56,137	4,504	12.5	96.7	23.0	–
2019	not published	5,150	16,135	53,228	4,407	12.1	96.8	22.9	–
2018	not published	3,016	9,449	31,934	2,637	12.1	94.5	22.2	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Chemical tanker median	vs Chemical tanker	Rank	Verifier	Methods
2025Bio blend	Stolt Tankers BV	17.2	15.0	+14%	826 of 1,460	DNV	B
2024	Stolt Tankers BV	22.9	16.7	+37%	848 of 1,274	DNV	B
2023	not published	16.4	16.2	+1%	662 of 1,314	DNV	B
2022	not published	26.1	16.1	+62%	1,064 of 1,409	DNV	B
2021	not published	22.0	16.7	+32%	911 of 1,343	DNV	B
2020	not published	23.0	16.2	+42%	925 of 1,312	Lloyd's Register	B
2019	not published	22.9	17.3	+32%	896 of 1,321	Lloyd's Register	B
2018	not published	22.2	17.1	+30%	877 of 1,294	Lloyd's Register	B

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Chemical tanker ships are benchmarked on CO₂ per transport work (cargo) (TW), in g CO₂/t·nm. CO₂eq adds methane and nitrous oxide and is in the public files from 2024. Rank counts from the lowest figure among that year's chemical tanker ships. Methods: A delivery notes, B tank monitoring, C flow meters, D direct measurement. FuelEU GHG intensity is not shown: it needs fuel types, which the public file does not carry. Operators are named only from 2024, the first year the public files carry them; earlier years belong to the ship, not to any company.