Most Emission-Efficient Chemical Tankers

Ships ranked by AER (Annual Efficiency Ratio) — grams of CO₂ emitted per tonne of deadweight carried one nautical mile (g CO₂/dwt·nm), the IMO carbon-intensity metric behind the CII rating — from official EU MRV emissions data for reporting year 2024. Lower is greener. Pick a segment and size class to see the greenest vessels first.

Segment rank (2024)

#501 of 1,350 chemical tankers

CO₂ intensity

7.5 g CO₂/dwt·nm

vs segment average (9.91)

-25% greener

Bulk Carrier Container Ship Oil Tanker Chemical Tanker Gas Carrier LNG Carrier General Cargo Vehicle Carrier Refrigerated Cargo Ro-Ro Cargo

Sort 🌱 Greenest first 🔧 Least efficient first — retrofit candidates

Size (DWT)

All sizes < 25,000 DWT 25k – 60k DWT 60k – 100k DWT 100k – 200k DWT > 200,000 DWT

Year

2025 2024

1,378

vessels ranked

3.64

greenest (g CO₂/t·nm)

8.79

segment median

#	Vessel	Size (DWT)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
501	STOLT EBONY IMO 9744908	32,786	2017	185 m	Jiangsu Antai Power Co. Ltd. 5G50ME-B9	7.5	B
502	BRAVE IMO 9335068	45,953	2008	183 m	MAN - 6S50MC-C	7.5	B
503	GREAT EASTERN IMO 9298739	37,515	2005	183 m	Hyundai - 6S50MC-C	7.5	B
507	CHEM SPARK IMO 9731743	25,196	2016	160 m	MAKITA - 5S46ME-B8	7.5	B
506	CHEMROAD QUEST IMO 9451288	34,832	2010	174 m	Mitsubishi - 6UEC50LSII	7.5	B
505	TARANGER IMO 9524762	45,372	2011	183 m	Hyundai - 6S50MC-C	7.5	B
504	STOLT VIRTUE IMO 9274317	25,230	2004	159 m	Akasaka - 6UEC52LS	7.5	B
511	INTERMEZZO IMO 9804825	37,328	2019	180 m	MAKITA - 6S46ME-B8	7.5	B
510	GLOBAL GLORY IMO 9821859	39,787	2019	183 m	MAN - 6S50ME-C9	7.5	B
509	GELIBOLU IMO 9314832	37,311	2006	183 m	MAN - 6S50MC-C	7.5	B
508	NCC MAHA IMO 9387683	46,265	2009	183 m	Hyundai - 6S50MC-C	7.5	B
513	BOW HARMONY IMO 9379909	33,619	2008	170 m	Akasaka - 6UEC52LS	7.5	B
512	STOLT SAGALAND IMO 9352200	44,044	2008	183 m	Kawasaki - 7S50MC-C	7.5	B
515	WECO MADELEINE IMO 9693824	49,708	2016	184 m	BRODOSPLIT - 6S50ME-B9	7.5	B
514	MTM DUBLIN IMO 9335824	33,682	2007	170 m	Akasaka - 6UEC52LS	7.5	B
516	ALDEBARAN IMO 9723007	37,887	2014	183 m	MAN - 5S50ME-B9.2 Tier II	7.5	B
517	HAFNIA ADAMITE IMO 9727546	38,506	2015	184 m	HHI - 6S50ME-B9.3	7.5	B
518	SEA STRATUS IMO 9724556	39,999	2017	183 m	Hyundai - 6S50ME-B9	7.5	B
521	ARS ET LABOUR IMO 9396385	40,416	2008	180 m	STX - 6 S 50 MC-C	7.5	B
520	RED GARNET IMO 9694359	49,999	2015	183 m	MAN - 6G50ME-B9	7.5	B
519	BOW COMPASS IMO 9412737	33,609	2009	170 m	Akasaka - 6UEC52LS	7.5	B
522	KRITI SAILOR IMO 9335135	37,448	2007	184 m	MAN - 6S50MC-C	7.6	B
523	MALBEC LEGACY IMO 9732826	37,596	2016	184 m	Hyundai - 6S50ME-B9	7.6	B
524	RED DIAMOND IMO 9583665	51,034	2012	183 m	STX - 6 S 50 MC-C	7.6	B
525	STOLT ARGON IMO 9739288	27,579	2016	165 m	Yichang - 5S50ME-B9	7.6	B
528	UACC SHAMIYA IMO 9458858	45,479	2011	183 m	HHI - 6S50MC-C7	7.6	B
527	BOW HERCULES IMO 9752046	40,847	2017	183 m	STX - 6S50ME-B9	7.6	B
526	VELOS TOPAZ IMO 9360441	39,808	2007	182 m	Akasaka - 6UEC52LS	7.6	B
529	BOW FORTUNE IMO 9168635	37,395	1999	183 m	MAN - 6 L 60 MC	7.6	B
530	BOW ENGINEER IMO 9317860	30,086	2006	170 m	Akasaka - 6UEC52LS	7.6	B
531	CHIP IMO 9353101	37,293	2008	184 m	MAN - 6S50MC-C	7.6	B
532	HUANG SHAN 16 IMO 9967940	19,985	2023	153 m	6S35ME-C9	7.6	B
533	STOLT NORLAND IMO 9414060	43,593	2009	183 m	Kawasaki - 7S50MC-C	7.6	B
534	KRITI CORAL IMO 9417220	49,499	2006	183 m	STX - 6 S 50 MC-C	7.6	B
537	HORIZON THETIS IMO 9407380	50,266	2006	183 m	MAN - 6S50MC-C	7.7	B
536	GALLOP IMO 9799678	37,250	2019	180 m	MAN - 6S46ME-B8	7.7	B
535	ARGOLIS IMO 9326524	40,083	2007	175 m	STX - STX-MAN B&AMP;W 6S50MC	7.7	B
538	SAKHARA LOTUS IMO 9400382	32,107	2009	170 m	Akasaka - 6UEC50LSII	7.7	B
539	CHEM HELEN IMO 9340116	38,396	2007	183 m	DALIAN MARINE - 6S50MC-C	7.7	B
540	BOW FAITH IMO 9114232	37,479	1997	183 m	6L60MC	7.7	B
541	STOLT ISLAND IMO 9414058	43,593	2009	183 m	Kawasaki - 7S50MC-C	7.7	B
543	BRITISH ENGINEER IMO 9724702	45,999	2017	180 m	Hyundai - 6G50ME-B9	7.7	C
542	CHEMTRANS MOBILE IMO 9732802	37,596	2016	184 m	MAN - 6S50ME-B9	7.7	C
545	HAFNIA MALACCA IMO 9725627	39,067	2015	184 m	MAN - 6S50ME-B9	7.7	C
544	AMIF IMO 9396373	40,429	2008	180 m	MAN - 6S50MC-C	7.7	C
548	STI WEMBLEY IMO 9691735	38,734	2014	184 m	MAN - 6S50ME-B9	7.8	C
547	BOCHEM ROTTERDAM IMO 9955478	26,599	2021	159 m	MAN - 5S50ME-C9	7.8	C
546	BOW FLORA IMO 9143207	37,369	1998	183 m	6L60MC	7.8	C
549	CHEMSTAR RIVER IMO 9758026	22,407	2017	150 m	Mitsubishi - 6UEC45LSE	7.8	C
550	JIPRO NEFTIS IMO 9459292	34,858	2011	174 m	Mitsubishi - 6UEC50LSII	7.8	C

Page 11 of 27 — 1,350 vessels

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Engine intelligence

Which engines power the greenest fleets?

The main engine is the single largest CO₂ source on board — typically well over 80% of a ship's emissions come from propulsion. We aggregated this ranking the other way around: every engine design is scored by the measured carbon intensity of the vessels carrying it, licensee-built units merged under their design brand. The verdict from the 2024 data — modern dual-fuel designs like MAN B&W's ME-GI and WinGD's X-DF families, together with EGR/SCR-abated and ultra-long-stroke G-type engines, consistently power the most emission-friendly ships in service.

Emission-friendly engine ranking

AER (Annual Efficiency Ratio) = annual CO₂ emissions ÷ (deadweight × distance sailed), the IMO carbon-intensity metric used for CII ratings. It is built only from measured CO₂, distance and deadweight — not the self-reported cargo transport-work figure, which is unreliable. Implausible outliers (top 2% per segment) are excluded. Grade A–E reflects each vessel's rank within its segment. Source: EMSA THETIS-MRV.