ICODOS
3D engineering model of the POSEIDON demonstration plant
Demonstration Plant · EU-Funded

POSEIDON

ICODOS' demonstration-scale plant — a roughly 15× scale-up of the Mannheim pilot that turns biogenic CO₂ into certified green e-methanol for shipping, within a Horizon Europe project preparing maritime fuel value chains.

POSEIDON is ICODOS' demonstration-scale e-methanol plant and the centerpiece of a Horizon Europe project of the same name. It is being built at the Mannheim wastewater treatment plant, capturing biogenic CO₂ from the site's biogas and converting it — with renewable electricity and green hydrogen — into e-methanol. Scaling the patented hybrid process roughly 15× beyond the Mannheim pilot, it produces e-methanol for real-world tests in marine engines and prepares local value chains as a shipping fuel for the ports of Valencia and Thessaloniki — bridging the gap between pilot and full commercial deployment with Plant S.

≈ €10M
Horizon Europe co-funding
19 partners
Across 7 countries
~15×
Scale-up of the Mannheim pilot
Project at a Glance

Key Facts

  • Programme

    Horizon Europe

  • Grant agreement

    No. 101117616

  • Budget

    ≈ €10M co-funded

  • Timeline

    Sep 2023 – Aug 2027

  • Consortium

    19 partners · 7 countries

  • Location

    Mannheim WWTP, Germany

  • Scale

    ≈ 15× the Mannheim pilot

  • Methanol output

    ≈ 150 t/yr

  • CO₂ capture

    >99%

FundingCo-funded by the European Union
What ICODOS Brings

The demonstration plant, end to end

ICODOS is the technology provider and delivers the POSEIDON demonstration plant end to end — supplying the integrated CO₂-capture-plus-e-methanol-synthesis technology and handling design, engineering, procurement, construction and operation, including dynamic, automated operation with remote monitoring. The plant captures biogenic CO₂ and produces roughly 150 t/yr of e-methanol for engine and pilot-boat fuel tests.

  • Integrated CO₂ capture and e-methanol synthesis in one modular plant

  • Full-scope delivery: design, engineering, procurement, construction and operation

  • Dynamic, automated operation with remote monitoring

  • Modular, containerized plant design (multiple process modules)

The Design

POSEIDON in 3D

3D engineering model of the POSEIDON demonstration plant
3D engineering model of the POSEIDON demonstration plant — alternate view
Why It Matters

Why POSEIDON

  1. 01

    Roughly 15× scale-up of the validated Mannheim 001 process, bridging pilot and commercial scale

  2. 02

    Demonstrates e-methanol as a drop-in fuel for shipping, tested in real marine engines

  3. 03

    Prepares local e-methanol value chains for the ports of Valencia and Thessaloniki

The Consortium

A European maritime-fuel collaboration

POSEIDON brings together 19 partners across seven countries — from research institutes to shipbuilders, engine makers and ports — coordinated by EIFER.

  • EIFER
  • ICODOS
  • EDF
  • Fincantieri
  • Isotta Fraschini Motori
  • WinGD
  • Global Omnium
  • CAO Hellas
  • KIT
  • Aristotle University of Thessaloniki
  • CERTH
  • CNR-STEMS
  • Fundación Valenciaport
  • Port of Thessaloniki
  • RINA
  • Steinbeis Europa Zentrum
  • AVEBIOM
  • Swedish Maritime Administration
  • Inventors

Funded by the European Union (Horizon Europe, Grant Agreement No. 101117616). Views and opinions expressed are those of the author(s) only and do not necessarily reflect those of the European Union or the granting authority. Neither the European Union nor the granting authority can be held responsible for them.

Want to learn more about POSEIDON?

Visit project-poseidon.eu ↗Start a Conversation
POSEIDON — Demonstration Plant — ICODOS