The Leading Role of Barcelona Port in Maritime Energy Transition in the Mediterranean with Bio-LNG
The Port of Barcelona has taken a significant step towards maritime decarbonization by carrying out the first ship-to-ship (STS) bio-LNG supply operation in the Mediterranean. This initiative, in collaboration with Enagás, Knutsen Scale Gas, Shell, and TUI Cruises, positions the port as a leader in the adoption of low-carbon fuels and sets a precedent for ports worldwide.
This milestone in energy transition occurred on July 26, 2025, when the TUI Cruises’ vessel Mein Schiff Relax received 1,875 m³ of renewable liquid methane, marking a pivotal moment for the cruise industry and decarbonization efforts in the region. This operation highlights not only the port’s strategic capacity to lead the energy transition but also the importance of joint investments and collaborative partnerships for a sustainable and scalable maritime supply future.
- The first ship-to-ship bio-LNG supply operation in the Mediterranean
- Demonstrates viability of alternative fuels in large capacity cruises
- Potential for new job opportunities in the sector
- Implications on economic and legislative aspects
The Evolution of Fuel Supply: From Truck to STS
Prior bio-LNG supplies in the Port of Barcelona were carried out by tanker trucks. However, the use of the barge Haugesund Knutsen, operated by Knutsen Scale Gas and chartered by Shell Marine, has increased the supplied fuel volume by more than 15 times, as well as significantly streamlining the process. This transition to STS supply is vital for the cruise sector where volume and speed in supply are crucial to meet demanding operational schedules and promote the adoption of emissions-neutral fuels.
- Increased efficiency and operational effectiveness
- Successful transition to sustainable fuels
- Reduction in emissions throughout the supply chain
- Contribution to compliance with stricter environmental regulations
A Circular Fuel Model: “Zero-Kilometre” Bio-LNG
Bio-LNG, a “drop-in” fuel similar to fossil LNG, can be used in dual-fuel engines without modifications. What sets bio-LNG apart is its sustainable profile: derived entirely from organic waste, its use can reduce greenhouse gas emissions by 70-100% over its lifecycle. The production of bio-LNG at the Port of Barcelona follows a “zero-kilometre” model, where the Enagás regasification plant plays a crucial role. Certification by the International Sustainability and Carbon Certification (ISCC EU) ensures the fuel meets traceability and sustainability standards, paving the way for similar initiatives in other global ports.
- Sustainable production and local distribution model
- Replicable model for global adoption
- Contribution to a circular economy in the shipping sector
Towards Climate Neutrality: TUI Cruises’ Role
The Mein Schiff Relax supply operation is part of TUI Cruises’ climate protection roadmap, aiming to achieve climate neutrality by 2050. The company’s strategy is based on four fundamental pillars, including the adoption of alternative fuels, connection to shore power in ports, energy efficiency, and optimized travel planning. The Mein Schiff Relax, as the first vessel in the fleet powered almost exclusively by LNG, leads the way in this transition, while new vessels like the Mein Schiff 7 are preparing to use next-generation fuels such as green methanol.
- Commitment to sustainability in response to emerging regulations
- Positioning as an industry leader in innovation
- Setting standards for future environmental initiatives
A Collaborative Ecosystem: Role of Industry Leaders
The success of this operation results from the collaboration of multiple actors, each bringing their essential expertise to the process. Enagás, as the operator of the regasification plant, provides the physical and regulatory basis for the “zero-kilometre” model, certifying the sustainability and traceability of bio-LNG from origin to final destination on the vessel. Knutsen Scale Gas and Shell Marine play crucial roles in fuel logistics, operating the LNG bunkering barge and expanding offerings for low-carbon fuels respectively. TUI Cruises, as the end-user, drives demand and justifies investments in infrastructure through its commitment to bio-LNG and next-generation fuels.
- Public-private collaboration key to operation success
- Replicable model inspiring other ports and companies
- Advancing towards a more sustainable maritime future
Barcelona: A Replicable Model for Global Decarbonization
Barcelona’s strategic location and proactive investments in sustainable infrastructure create an ideal environment for testing emerging fuel technologies. This bio-LNG bunkering operation, supported by certification and public-private partnerships, offers a replicable model for ports worldwide. Facing pressures
