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.
| # | Vessel | Size (DWT) | Built | Carbon intensity — AER (g CO₂/dwt·nm) | Grade |
|---|---|---|---|---|---|
| 651 |
SEA NIMBUS
IMO 9724544
|
39,999 | 2016 |
8.5
|
C |
| 652 |
MH FUTURE
IMO 9986001
|
19,727 | 2024 |
8.5
|
C |
| 653 |
STOLT MERCURY
IMO 9739329
|
27,578 | 2017 |
8.5
|
C |
| 654 |
SOLAR SUZANNE
IMO 9877638
|
25,039 | 2020 |
8.5
|
C |
| 655 |
HAFNIA SOYA
IMO 9729271
|
39,067 | 2015 |
8.5
|
C |
| 656 |
BOW NEON
IMO 9777369
|
27,601 | 2017 |
8.5
|
C |
| 657 |
SAGAMI
IMO 9379911
|
33,614 | 2008 |
8.5
|
C |
| 658 |
LADY RINA
IMO 9631383
|
39,310 | 2012 |
8.5
|
C |
| 659 |
EASTERLY LIME GALAXY
IMO 9380972
|
19,992 | 2008 |
8.5
|
C |
| 660 |
ANGI
IMO 9253246
|
37,211 | 2003 |
8.5
|
C |
| 661 |
RAMIRA
IMO 9890599
|
17,999 | 2021 |
8.6
|
C |
| 662 |
OTTO H
IMO 9749374
|
25,161 | 2016 |
8.6
|
C |
| 663 |
CAROLINE
IMO 9262091
|
45,999 | 2002 |
8.6
|
C |
| 664 |
FAIRCHEM KATANA
IMO 9749685
|
19,980 | 2016 |
8.6
|
C |
| 665 |
TWIST
IMO 9422639
|
37,791 | 2009 |
8.6
|
C |
| 666 |
CLOTILDE
IMO 9448310
|
38,375 | 2008 |
8.7
|
C |
| 667 |
BOW LEOPARD
IMO 9952165
|
26,004 | 2023 |
8.7
|
C |
| 668 |
WECO AMELIE
IMO 9693812
|
49,708 | 2015 |
8.7
|
C |
| 669 |
MTM HAMBURG
IMO 9379844
|
20,564 | 2008 |
8.7
|
C |
| 670 |
VALDERICE
IMO 9587843
|
37,583 | 2011 |
8.7
|
C |
| 671 |
PRABHU LAL
IMO 9416044
|
19,859 | 2008 |
8.7
|
C |
| 672 |
KRITI CAPTAIN
IMO 9335147
|
37,434 | 2007 |
8.7
|
C |
| 673 |
UACC RIYADH
IMO 9458834
|
45,444 | 2011 |
8.7
|
C |
| 674 |
SOLAR SHERIDAN
IMO 9877652
|
25,039 | 2021 |
8.7
|
C |
| 675 |
UACC MANSOURIA
IMO 9489089
|
45,293 | 2013 |
8.7
|
C |
| 676 |
ULUC KA
IMO 9228801
|
37,272 | 2001 |
8.7
|
C |
| 677 |
UOG ANDROS
IMO 9480162
|
45,562 | 2014 |
8.7
|
C |
| 678 |
ATLAS STAR
IMO 9376828
|
38,289 | 2008 |
8.7
|
C |
| 679 |
STOLT VANGUARD
IMO 9274305
|
25,261 | 2004 |
8.7
|
C |
| 680 |
AQUA RAY
IMO 9973676
|
21,950 | 2023 |
8.7
|
C |
| 681 |
RUI FU SHENG
IMO 9379129
|
46,846 | 2007 |
8.7
|
C |
| 682 |
LOUIS P
IMO 9749336
|
25,161 | 2016 |
8.8
|
C |
| 683 |
GOLD TRADER
IMO 9907005
|
33,293 | 2022 |
8.8
|
C |
| 684 |
SAANA
IMO 9739836
|
17,991 | 2018 |
8.8
|
C |
| 685 |
RAMELIA
IMO 9818280
|
17,994 | 2019 |
8.8
|
C |
| 686 |
ANTIOCHIA KA
IMO 9311751
|
36,993 | 2006 |
8.8
|
C |
| 687 |
FAIRCHEM PROTEA
IMO 9908346
|
19,959 | 2021 |
8.8
|
C |
| 688 |
AMBER RAY
IMO 9973664
|
21,945 | 2023 |
8.8
|
C |
| 689 |
SUNRISE RAY
IMO 9829679
|
19,976 | 2018 |
8.8
|
C |
| 690 |
STOLT SINCERITY
IMO 9680085
|
38,850 | 2016 |
8.8
|
C |
| 691 |
GINGA HAMMERHEAD
IMO 9829760
|
25,179 | 2019 |
8.8
|
C |
| 692 |
TERN FORS
IMO 9909651
|
15,034 | 2022 |
8.8
|
C |
| 693 |
EK-RIVER
IMO 9808259
|
19,884 | 2018 |
8.8
|
C |
| 694 |
PEONIA
IMO 9313436
|
28,987 | 2005 |
8.8
|
C |
| 695 |
MONAX
IMO 9311256
|
20,645 | 2005 |
8.8
|
C |
| 696 |
STOLT BOBCAT
IMO 9511167
|
23,432 | 2009 |
8.8
|
C |
| 697 |
CARIA KA
IMO 9327360
|
37,067 | 2006 |
8.8
|
C |
| 698 |
MINERVA TYCHI
IMO 9723291
|
39,070 | 2016 |
8.9
|
C |
| 699 |
FAIRCHEM LOYALTY
IMO 9791183
|
22,322 | 2019 |
8.9
|
C |
| 700 |
LIBERA
IMO 9293973
|
40,102 | 2006 |
8.9
|
C |
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.
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.