Navalyze · Chemical tanker · Ship

STENA IMPULSE

IMO: 9666089
Type: Chemical tanker
Average cargo carried: 35,961 t
Port of registry: Hellerup
Technical efficiency: EEXI 4.41 g CO₂/t·nm
Former names: STENAWECO IMPULSE

Report year

2023 at a glance

From the 2023 THETIS-MRV report. Carries about 35,961 t of cargo on average.

Fuel per mile

98.2 kg/nm

Chemical tanker median 81.9 kg/nm (+20%)

CO₂ per transport work (cargo)

8.63

g CO₂/t·nm · Chemical tanker median 16.23 (−47%)

Average speed

11.9 kn

Chemical tanker median 11.2 kn (+6%)

Fuel per day at sea

28.0 t/day

Fuel consumed

1,219 t

CO₂ emitted

3,853 t

Distance sailed

12,417 nm

CO₂ ÷ CO₂ per mile

Time at sea

1,045 h

44 days, 12% of the year

Within the chemical tanker fleet, 2023

Set against all 1,314 chemical tanker ships with a full-year 2023 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 per mileThis ship 98.2 kg/nm · median 81.9 (+20%)

55.0Ranks 980 of 1,314, lowest first114.9

Average speedThis ship 11.9 kn · median 11.2 (+6%)

9.1Faster than 72% of chemical tanker ships12.7

CO₂ per transport work (cargo)This ship 8.63 g CO₂/t·nm · median 16.23 (−47%)

9.07Ranks 101 of 1,314, lowest first43.80

Middle 80% of shipsMiddle 50%Chemical tanker medianThis ship

Where the emissions happen, 2023

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 ports5%
From the EU25%
Into the EU60%
At berth in the EU10%

Fuel burned laden

–

Not reported

CO₂ at berth

10.1%

Alongside in EU ports

Methane (CH₄)

–

Mainly from LNG; small for oil

CO₂eq ÷ CO₂

–

Uplift from CH₄ and N₂O, counted in full from 2026

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 per mile, kg/nm

STENA IMPULSE
Chemical tanker median

80.090.0100.0110.0120.0

’182018’192019’202020’212021’222022’232023

Average speed, kn

STENA IMPULSE
Chemical tanker median

10.010.511.011.512.0

’182018’192019’202020’212021’222022’232023

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

STENA IMPULSE
Chemical tanker median

0.010.020.030.040.0

’182018’192019’202020’212021’222022’232023

Year on year

Year	Speed	Fuel per mile	Fuel per day	Distance	CO₂ per TW	Reading
2022→2023	+0.1 kn	−16%	−15%	−5%	−29%	Same speed, fuel per mile down 16%; better than speed alone explains (hull, engine or trade).
2021→2022	+0.4 kn	+43%	+48%	+128%	−67%	0.4 kn faster, fuel per mile up 43%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+0.8 kn	−26%	−21%	−83%	+302%	0.8 kn faster, fuel per mile down 26%; better than speed alone explains (hull, engine or trade).
2019→2020	+0.2 kn	+28%	+30%	+273%	+0%	Same speed, fuel per mile up 28%; worse than speed alone explains (fouling, weather, loading or trade).
2018→2019	−1.4 kn	−14%	−24%	−62%	+9%	1.4 kn slower, fuel per mile down 14%; worse than speed alone explains (fouling, weather, loading or trade).

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	At sea h	Speed kn	Fuel kg/nm	CO₂ g/t·nm	Laden fuel
2023	not published	1,219	3,853	12,417	1,045	11.9	98.2	8.63	–
2022	not published	1,525	4,816	13,051	1,110	11.8	116.9	12.17	–
2021	not published	467	1,463	5,736	503	11.4	81.5	36.37	–
2020	not published	3,717	11,631	33,734	3,171	10.6	110.2	9.05	–
2019	not published	780	2,447	9,042	869	10.4	86.3	9.04	–
2018	not published	2,381	7,474	23,634	2,004	11.8	100.8	8.27	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Chemical tanker median	vs Chemical tanker	Rank	Verifier	Methods
2023	not published	8.63	16.23	−47%	101 of 1,314	DNV	B
2022	not published	12.17	16.06	−24%	417 of 1,409	DNV	B
2021	not published	36.37	16.69	+118%	1,147 of 1,343	DNV	B
2020	not published	9.05	16.16	−44%	118 of 1,312	DNV	B
2019	not published	9.04	17.32	−48%	115 of 1,321	Lloyd's Register	B
2018	not published	8.27	17.14	−52%	62 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.