Integrated Annual Report 2024

Our advances

ENERGY TRANSITION

In Rotterdam, a CO2 Transportation and Storage Project to decarbonize European industry

The Porthos project is a public-private infrastructure initiative designed for CO2 reduction in the largest industrial port in Europe and to set a standard for other industrial hubs to follow. Air Liquide is one of four industrial launching customers for this project. Its goal: substantially reduce the site’s CO2 emissions thanks to an ambitious carbon capture and storage (CCS) solution.

This image shows the CO₂ capture, transport and sequestration scheme. CO₂ capture and sequestration objective (Air Liquide)

Key figures:

  • 2.5 million tonnes of CO₂ captured and delivered annually from 2026 onwards
  • 10 million tonnes of CO₂ transported annually
  • 37 million tonnes of CO₂ stored

Steps in the process illustrated:

  1. Capture: The CO₂ is captured directly at the source at local industrial sites.
  2. Compression: The captured CO₂ is sent to a compression station to be prepared for long-distance transport.
  3. Transport: Dual modality possible: Underground pipeline or Maritime transport (via specialised vessels)
  4. Storage: The CO₂ is transported to an offshore platform and Injection into deep geological strata via suitable wells.
  5. Sequestration (Storage location): The CO₂ is permanently trapped in an impermeable rock formation under the sea (saline aquifer or old deposit type).