Research Intelligence Brief — March 2026
Onboard Carbon Capture for Ships:
Promising Technology, Punishing Economics
~60 vessels now operate with some form of capture equipment. EU ETS hit 100% coverage in January 2026, creating €1–11M in annual compliance costs per vessel. The technology works. The economics don't — yet. This brief maps what we know, what's proven, and where the crossover lies.
The Core Thesis
Technology is proven
Wärtsilä demonstrated 70% capture at sea. Value Maritime has 24+ CCS installations running commercially. Five of the world's largest container lines commissioned DNV to study fleet-scale deployment. The “can it work?” question is answered.
Economics don't close — yet
Capture costs of $150–400/tCO₂ vs regulatory savings of ~€81/tCO₂. A 5-year payback requires an effective carbon value of ~€200+/tCO₂ — achievable only by stacking ETS avoidance, CII life extension, FuelEU credits, and green premiums simultaneously.
But OCCS may already pay for itself — through asset life extension
OCCS extends a vessel's CII C-rating by ~9 years, preserving ~$9.9M in charter value on a mid-life Capesize. This reframes the question: not “does carbon capture pay back?” but “does it keep my vessel commercially alive?” The window for CCS-ready specs and pilot experience is now — before the 2028–2030 inflection.
Gross ≠ Net — The methodological error that inflates every headline number
A system capturing 40% of exhaust CO₂ does NOT reduce total emissions by 40%. The capture process consumes additional fuel (energy penalty), generating more CO₂. After accounting for this plus value-chain emissions, only 0.77–0.84 tonnes are actually avoided per tonne captured. [7] Every economic model on this page uses the net figure. If a vendor quotes gross capture rates without this adjustment, their economics are overstated by 16–23%.
Economic Analysis Playground
The economics are brutal today but have a visible path to viability. Use the controls below to model different scenarios — start with “CII Life Extension” to see the strongest near-term case.
Model Inputs
CO₂ emission factor: 3.114 tCO₂/t fuel (LSFO)
Net/gross ratio: 0.84 (lifecycle adjustment)
Energy penalty: scales with capture rate (15% at 40%, 35% at 80%)
Negative return. At €85/tCO₂ with 40% capture, annual OPEX (€1.69M) exceeds ETS savings (€0.91M). The energy penalty consumes 22% more fuel, costing €1.44M/year. All-in capture cost: €163/tCO₂ — the gap to carbon price is 1.9×.
Where the Opportunity Lies
Three underappreciated plays that justify near-term investment — and one competitive dynamic that limits the strategic window.
CII Life Extension
The killer near-term value proposition
REMARCCABLE found OCCS extends a vessel's CII C-or-better rating by 9 additional years. A 15-year-old Capesize facing D/E rating can maintain a C rating — preserving charter eligibility that would otherwise be lost.
The math that matters:
A $3,000/day charter rate differential preserved for 9 years ≈ $9.9M in present value. That alone can justify €5–10M CAPEX on a mid-life vessel — regardless of carbon price savings.
Try the “CII Life Extension” scenario in the economic model above to see this case in action.
LNG Carriers — The First Viable Application
Economics close 3–5 years before conventional fuel vessels
Cleaner exhaust = less solvent degradation. Available cold energy from LNG regasification slashes CO₂ liquefaction costs (5.72 vs 33.28 MJ/kg). Lower energy penalty. LNG's lower carbon intensity stacks with capture.
Leading indicator:
Hanwha Ocean has an AiP for compact OCCS on GasLog LNG carriers targeting 75–80% emission reduction. This is likely the first vessel type where a 5-year payback becomes achievable.
Voluntary Carbon Removal Credits
$150–600/tonne from buyers like Microsoft and Stripe
Permanently stored CO₂ via Northern Lights qualifies as high-quality carbon removal. Companies buying CDR credits pay well above EU ETS levels. If captured CO₂ can be verified under credible standards, this revenue stream could exceed compliance savings.
Speculative but worth monitoring. Ship-based capture into geological storage is the kind of permanent, measurable removal that premium buyers seek.
The Competition: Alternative Fuels
The dynamic every OCCS analysis misses
Ship owners evaluating OCCS are simultaneously evaluating methanol dual-fuel, ammonia-ready designs, and LNG. A ship owner who just spent $180M on a methanol dual-fuel newbuild isn't layering on $5–15M of OCCS.
OCCS still has value in an alternative-fuel future (ammonia engines produce CO₂ from pilot fuel, methanol is carbon-containing). But on fossil-fueled vessels it may be transitional. The strategic window is finite.
Strategic Recommendation
Do Now (2026)
1. Specify “CCS-ready” on all newbuild orders. Minimal incremental cost, maximum option value.
2. Pilot a modular system (Value Maritime or Seabound) on one EU-trading tanker to build operational experience and data.
3. Monitor EU ETS prices and IMO CII/FuelEU crediting decisions quarterly.
Scale Triggers (2028–2030)
Trigger 1: EU ETS crosses €120–150/tCO₂.
Trigger 2: OCCS gets credited under CII and FuelEU Maritime.
Trigger 3: Capture costs reach €80–120/tCO₂ through scale and learning.
Regulatory Landscape & Timeline
EU ETS is the only regulation that directly credits OCCS today. CII and FuelEU Maritime do not — yet.
The CII Paradox — The Single Biggest Commercial Blocker
Under current IMO rules, running OCCS worsens your CII rating. The energy penalty increases reported fuel consumption, pushing the vessel toward D/E ratings — even though actual emissions are lower. Flagged since MEPC 79 (2022), repeatedly deferred. Until CII credits OCCS (expected ~2028), ship owners face a direct conflict: reduce real-world emissions or maintain the paper metric that determines charter eligibility. [6]
EU ETS
STATUS: ACTIVE — CREDITS OCCS
100% coverage from Jan 2026. Ships ≥5,000 GT: 100% intra-EU, 50% EU↔non-EU. Each tonne permanently stored = one fewer EUA surrendered (~€81 today). The strongest incentive available.
IMO CII
DOES NOT CREDIT OCCS
CII integration expected ~2028. Reduction factors tighten to 21.5% by 2030. See CII Paradox above.
FuelEU Maritime
DOES NOT RECOGNIZE OCCS
EC FAQ (March 2026): “CCS is not accounted for.” Article 30.2(i) allows future inclusion. If credited, OCCS could let fossil-fueled ships meet GHG intensity requirements until 2044.
Political Risk
EU ETS prices are politically managed and have crashed before (~€81 today, down from >€100 in 2023). The IMO Net-Zero Framework was already delayed from April to October 2026 due to US opposition. Any business case requiring €150+ carbon prices should be stress-tested against a scenario where that never arrives.
Capture Technology Landscape
Seven distinct approaches, converging on amine scrubbing as the workhorse. Each trades maturity for a specific advantage.
| Technology | TRL | Capture Rate | Energy Penalty | Key Advantage | Sea-Proven? |
|---|---|---|---|---|---|
Amine Scrubbing MEA, KS-1, OASE blue | 7–8 | 50–90% | 5–15% fuel | Most proven; highest maturity; multiple full-scale installations | Yes |
Calcium Looping Seabound | 5–7 | Up to 95% | Near-zero onboard | Solid storage (limestone); cement feedstock; no pressure vessels | Pilot |
Centrifugal (RPB) Carbon Ridge | 5–6 | Up to 90% | Similar to amine | 75–90% smaller footprint; 400–600 RPM rotating packed beds | Pilot |
NaOH Absorption Langh Tech | 6–7 | >80% | Moderate | Valuable sodium carbonate byproduct offsets OPEX | Yes |
Cryogenic LNG synergy | 4–6 | 85–95% | High (low w/ LNG) | CO₂ already liquefied; ideal for LNG carriers using cold energy | Lab |
Membrane TRL 2–4 | 2–4 | 70–85% (lab) | Moderate electrical | Compact, no liquid chemicals; needs EGR to boost CO₂ concentration | No |
Solid Sorbent (TSA) TRL 3–5 | 3–5 | 70–90% (lab) | ~40% less than amine | No liquid solvents; temperature swing adsorption | No |
Process Flow Diagrams
Deploy now. TRL 7–8, multiple vendors. The workhorse — imperfect but proven.
Process Engineering Reality Check
Energy penalty is not a fixed number. Real ships cycle through load profiles constantly — a vessel at 50% MCR has fundamentally different exhaust conditions than at 85% MCR. The reboiler duty curve steepens sharply above ~60% capture rate.
Solvent degradation is understated. SOx forms heat-stable salts; NO₂ causes oxidative degradation at 3.5–4 kg MEA/tCO₂. Onshore plants have dedicated reclaiming units. Ships have marine engineers with existing full workloads.
Ship motion affects column hydraulics. Rolling and pitching disrupt liquid distribution in packed absorption columns. North Atlantic winter conditions are a different proposition than the Singapore Strait.
The LNG carrier advantage is real. Cleaner exhaust, available cold energy for CO₂ liquefaction (5.72 vs 33.28 MJ/kg), lower energy penalty, and lower carbon intensity all stack.
Market Pioneers — Ranked Assessment
15 companies racing to commercialize. No single winner — each leads on a different dimension. The radar chart compares the top four on five engineering-weighted criteria.
Assessment Summary
Value Maritime — Best near-term bet for operators who need to act in 2026. Wins on operational simplicity and market penetration, not capture efficiency.
Scored 0–10 on: Technology Readiness Level, commercial availability, projected economics at scale, crew operational burden, and fleet deployment infrastructure. Scores reflect our assessment as of March 2026.
Value Maritime
Netherlands — Modular amine "Filtree"
Twenty-four CCS installations across tankers, feeders, and bulk carriers. Plug-and-play, installable in 10–17 days without drydocking. CO₂ stored in swappable "Battery" containers.
Verdict: Best near-term bet for operators who need to act in 2026. Wins on operational simplicity and market penetration, not capture efficiency.
~40% of exhaust CO₂
10–17 days, no drydock
Eastern Pacific, MOL, Ardmore, Berge Bulk
Buy, lease, or full savings arrangement
Why they're winning: They turned a continuous chemistry problem into a logistics problem. No onboard liquefaction, no pressure vessels, no solvent management by crew. Ship operators understand container swaps. That operational simplicity is why they have 24 installations while others have 1.
Wärtsilä
Finland — Full amine CCS system
Commercially launched May 2025. Seventy percent capture proven on Solvang's Clipper Eris. Five-stage system leveraging scrubber market leadership. Claims €50–70/tCO₂ all-in cost.
Verdict: Strongest fleet-scale play. Scrubber upgrade path gives 10,000+ existing customers a low-commitment entry point. Unverified cost claims need scrutiny.
70% proven at sea
€50–70/tCO₂ (unverified)
CCS-ready scrubber upgrade path
16+ feasibility studies; Solvang 7 newbuilds
Caveat: The €50–70/tCO₂ claim is suspiciously close to current ETS price and has not been independently verified. Until DNV or an academic study confirms this at sustained operation, treat it as aspirational. Their real strength is the scrubber upgrade path — lowest-commitment entry point for owners already in the Wärtsilä ecosystem.
Seabound
UK — Calcium looping
Seventy-eight percent capture efficiency piloted on 3,200 TEU container ship. Near-zero onboard energy penalty. CO₂ stored as limestone (no pressure vessels). First full-scale commercial units completed Feb 2026.
Verdict: Best long-run economics trajectory if calcium looping scales. Near-zero energy penalty is a step-change. Scale-up from pilot to fleet is the core risk.
~$150/tCO₂ at scale
Heidelberg Materials, NYK Line, thyssenkrupp
>£8.5M (YC, Lowercarbon, EPS)
Five 20-ft containers on deck
Scale-up risk: Going from 1 tonne CO₂/day prototype to 50–100+ tonnes/day is not linear. Limestone handling logistics (abrasive, dusty, heavy) and reactor throughput are genuinely hard engineering. The Heidelberg partnership is smart — guaranteed cement industry offtake. But be cautious on their timeline.
Carbon Ridge
US — Centrifugal RPB capture
First maritime centrifugal OCCS deployed July 2025 on Scorpio Tankers' STI Spiga. Claims 90%+ CO₂ reduction. 75–90% smaller footprint than conventional columns.
Verdict: Interesting footprint advantage (75–90% smaller). Unverified claims and single-vessel pilot. Watch, don't invest.
90%+ CO₂, >99% PM/NOx/SOx
>$20M (Katapult, Berge Bulk, Grantham)
Note: 90%+ claims await independent verification. Scorpio is both customer and investor — not arm's length validation. Interesting for space-constrained vessels but unproven at scale.
Mitsubishi Shipbuilding
Japan — Adapted Petra Nova technology
World's first marine CCS demonstration (Aug 2021) on "K" Line's 88,000-tonne coal carrier. CO₂ purity exceeded 99.9%. ClassNK AiP for commercial design April 2025.
Verdict: Petra Nova pedigree and Japanese shipping ecosystem backing. Strong on paper; limited maritime operational data to date.
Adapted from their 4,776 tCO₂/day Petra Nova onshore system. Building a dedicated LCO₂ demonstration carrier. Strong pedigree in large-scale amine capture, but maritime-specific operational data remains limited.
Langh Tech
Finland — NaOH-based capture
Four bulk carrier installations via Damen Shipyards (early 2025). NaOH reacts with CO₂ to produce sodium carbonate — an industrial commodity that partially offsets OPEX.
Verdict: Niche byproduct-revenue model. Economics depend on sodium carbonate market — works in the right conditions, not universal.
Targets 60% CO₂ reduction. The byproduct revenue model is interesting but depends on sodium carbonate market prices. Achieves >80% capture from treated exhaust with 20–30% net emission reductions overall.
The Signal That Matters Most
In late 2025, CMA CGM, Evergreen, Hapag-Lloyd, Maersk, and MSC — representing ~60% of global container capacity — jointly commissioned DNV to model OCCS deployment on the North Europe–Asia corridor. Their modeling shows potential for 6 million tonnes CO₂ abated annually by 2040. When 60% of container capacity is collectively evaluating a technology, fleet-scale deployment planning is happening even if individual investment decisions haven't been made.
Five Bottlenecks to Fleet-Scale Deployment
Each has a resolution pathway — but infrastructure will take longest.
Only Northern Lights (1.5 Mtpa, fully booked) and under-construction Porthos (2.5 Mtpa) offer relevant capacity. Total global infrastructure could handle ~4 Mtpa by 2028 — against potential demand of tens of millions of tonnes. No standardized custody transfer protocols, CO₂ quality specs, or metering standards exist for ship-to-shore transfer.
Resolution paths: Northern Lights Phase 2 (5 Mtpa by 2028), Porthos, Aramis, Delta Rhine Corridor. Value Maritime sidesteps this entirely with containerized CO₂-rich amine. Hub-and-spoke model with dedicated CO₂ shuttle vessels collecting at anchor is more realistic than port-by-port buildout.
The curve steepens non-linearly: at 70–82% capture, fuel penalty hits 30–42%, partially offsetting gains (see Gross ≠ Net above). Waste heat recovery can offset up to 58.5% of thermal energy needed; heat pump integration reduces fuel consumption by 43% vs steam boilers.
Step-changes: Calcium looping (near-zero onboard penalty), concentrated piperazine solvents (150°C operation, better thermal stability), ZEIOCC concept (LNG cold + waste heat + ORC integration achieved 28% carbon reduction with minimal energy input).
Without CII or FuelEU credit, two major compliance incentives are absent (see CII Paradox in Regulatory section). Resolution depends on IMO MEPC decisions (175 member states, glacial pace). EU is more likely to move first on FuelEU amendment ~2027.
Container ships face up to 10% cargo capacity loss. VLCCs fare best — CO₂ tanks on deck, no cargo volume loss, only 3–4% deadweight decrease. But 3,000 m³ of liquid CO₂ at −50°C creates free surface effects that affect vessel stability in beam seas. Naval architecture implications are manageable for newbuilds with proper baffling but are a genuine constraint for retrofits. Compact technologies (Carbon Ridge at 75% smaller, Carbon Clean CycloneCC at 50%) will help.
SOx → heat-stable salts. NO₂ → oxidative degradation at 3.5–4 kg MEA/tCO₂. Upstream SOx scrubbing and SCR/deNOx are essential but add cost. Mitsubishi's KS-1, concentrated piperazine, and MDEA/PZ blends resist degradation significantly better than MEA. Value Maritime's container swap model avoids crew solvent management entirely. Calcium looping and NaOH systems eliminate solvent issues by design.
- Wärtsilä, "Wärtsilä successfully tests carbon capture on Solvang's Clipper Eris — 70% capture rate achieved," press release, May 2025.
- Value Maritime, "Filtree System — Commercial Installations," company data, March 2026. 24 installations confirmed across multiple vessel types.
- DNV, "Joint industry study on OCCS deployment: North Europe–Asia corridor," commissioned by CMA CGM, Evergreen, Hapag-Lloyd, Maersk, and MSC, late 2025.
- EU ETS Maritime — Directive 2023/959 amending Directive 2003/87/EC. 100% coverage for shipping from January 2026, including CH₄ and N₂O.
- Faber et al., "Fourth IMO GHG Study 2020," International Maritime Organization, MEPC 75/7/15.
- REMARCCABLE Consortium, "Retrofitting Carbon Capture — Fleet Impact Assessment," EU Horizon Europe deliverable, 2024. CII life extension of 9 years for Capesize with OCCS.
- Long et al., "Towards Net Zero: Lifecycle assessment of onboard carbon capture," Marine Policy, 2024. Net/gross avoidance ratio of 0.77–0.84 tCO₂ avoided per tonne captured.
- Seabound, "Calcium looping pilot results: 78% capture on 3,200 TEU container vessel," company technical report, 2025.
- Northern Lights JV, "Phase 1 capacity: 1.5 Mtpa — fully subscribed," Equinor/Shell/TotalEnergies, 2025 annual report.
- Carbon Ridge, "First maritime centrifugal OCCS deployed on Scorpio Tankers' STI Spiga," press release, July 2025.
- Mitsubishi Shipbuilding, "World's first marine CCS demonstration on CC Ocean," August 2021. ClassNK AiP for commercial design, April 2025.
- European Commission, "FuelEU Maritime FAQ — CCS treatment," DG MOVE, March 2026. "CCS is not accounted for" under current framework; Article 30.2(i) allows future inclusion.
- Hanwha Ocean, "Approval in Principle for compact OCCS on GasLog LNG carriers targeting 75–80% emission reduction," Lloyd's Register, 2025.
- Langh Tech / Damen Shipyards, "NaOH-based carbon capture — four bulk carrier installations," press release, early 2025.
- IMO MEPC 82, "Net-Zero Framework adoption deferred from April to October 2026 due to member state objections," session notes, 2025.
All data as of March 2026. Where vendor claims are cited, independent verification status is noted inline. Economic model assumptions are documented in the playground tooltips.