Envision Energy completes world’s first green ammonia bunkering at Dalian Port, accelerating zero-carbon shipping

Envision Energy has completed the world’s first marine green ammonia bunkering operation, marking a major breakthrough for sustainable maritime fuel. The event took place on July 25, 2025, at COSCO Shipping Heavy Industry’s terminal in Dalian, China, where a port vessel was successfully fueled with green ammonia produced by Envision’s Chifeng Green Hydrogen-Ammonia Project. The operation, carried out by China Shipping & Sinopec Suppliers Co., Ltd., is being hailed as the first complete deployment of green ammonia—from production to bunkering and application—anywhere in the world.

This milestone is considered a significant advancement in the decarbonization of global shipping, one of the most difficult sectors to decarbonize due to its reliance on fossil-based marine fuels. Envision Energy, headquartered in Shanghai and known for its renewables-integrated smart energy systems, is positioning this achievement as a turning point in the global energy transition toward carbon-neutral maritime operations.

What happened at Dalian Port?

At the heart of the breakthrough was the fueling of a 5,500-horsepower ammonia-powered tugboat, equipped with a proprietary dual-fuel ammonia engine and specialized supply systems. The bunkering operation at COSCO’s terminal was enabled by green ammonia produced in Chifeng, Inner Mongolia, where Envision Energy operates the world’s largest green hydrogen and ammonia facility.

According to statements released by Envision, the port tugboat is capable of running on up to 91% ammonia, drastically reducing the need for conventional marine diesel. This high substitution rate significantly lowers greenhouse gas (GHG) emissions and sets a precedent for zero-carbon operations in coastal and port environments.

The vessel has already received official classification as an “Ammonia Fuel Tug” from the China Classification Society, confirming its compliance with safety and environmental performance benchmarks. With this development, Dalian Port has become the first port globally to offer bunkering for a wide range of alternative fuels—biofuel, green methanol, LNG, and now green ammonia—consolidating its role as a future-ready hub for clean maritime logistics in Northeast Asia.

How the Chifeng project enables commercial green ammonia bunkering

The green ammonia supplied for this landmark bunkering operation was generated by Envision’s Chifeng Green Hydrogen-Ammonia Project. The facility integrates large-scale wind and solar power with energy storage systems and proprietary electrolysis and ammonia synthesis technologies. This enables what Envision describes as “dynamic coupling” of renewable energy generation and green molecule production.

The project has received multiple third-party certifications, including ISCC PLUS verification and renewable ammonia certification from Bureau Veritas. These designations confirm that the ammonia is produced through 100% renewable inputs and meets stringent GHG reduction standards. ISCC PLUS is one of the leading voluntary certification schemes for bio-based and circular economy products, while Bureau Veritas is an international classification society known for its strict environmental standards.

Envision Energy emphasized that this certification-backed process enables traceability and sustainability at industrial scale, addressing concerns from global shipping regulators and fuel buyers who are demanding verifiable low-emission alternatives. The project is reported to be the world’s largest and most cost-efficient green ammonia production system to date, setting a benchmark for future facilities across Europe, Asia, and the Americas.

Significance for maritime decarbonization and global fuel supply chains

The International Maritime Organization (IMO) has committed to achieving net-zero GHG emissions from international shipping around 2050, with an interim goal to cut emissions by at least 40% by 2030. Achieving these goals requires the immediate deployment of zero-carbon fuels at commercial scale—something the Envision-led operation now demonstrates is technically and logistically feasible.

Green ammonia, derived from water electrolysis and nitrogen synthesis powered by renewables, is seen as a strong contender to replace heavy fuel oil (HFO) in long-haul maritime applications. Its advantages include high energy density, lower volatility compared to hydrogen, and compatibility with existing fuel infrastructure when properly retrofitted. However, commercial bunkering operations had until now remained theoretical due to concerns over toxicity, storage, and supply chain fragmentation.

By delivering an end-to-end ammonia fuel supply—from renewable power input to port-side bunkering and engine compatibility—Envision Energy is helping bridge the gap between pilot trials and operational deployment. Frank Yu, Senior Vice President of Envision Energy, stated that this success “redefines what’s possible for the broader industrial transition,” adding that the company remains committed to enabling net zero solutions for hard-to-abate sectors such as maritime transport.

Why Dalian Port matters in the global green fuel transition

Dalian’s designation as the first port worldwide to offer bunkering of green ammonia alongside LNG, methanol, and biofuels reflects broader efforts by Chinese authorities to position the country as a leader in next-generation marine energy infrastructure. Located on China’s northeast coast, Dalian is a strategic maritime gateway for Asia-Pacific shipping lanes and container traffic.

Chinese energy and shipping regulators have identified green ammonia as a key enabler of China’s dual carbon goals—peaking emissions before 2030 and achieving carbon neutrality by 2060. Dalian’s port facilities, upgraded in recent years with storage and fuel handling systems for alternative fuels, provide an ideal proving ground for international vessel operators looking to meet IMO and EU emissions rules.

Officials involved in the bunkering confirmed that this event fills a critical gap in green marine fuel supply chains, particularly for Asia-Europe shipping routes. The vessel bunkered at Dalian is expected to be used for regular operations in and around port terminals, offering a real-world use case to study safety, emissions, and logistics performance in coming months.

Potential industry impact and scaling roadmap

The successful bunkering of a fully classified ammonia-fueled vessel paves the way for scaled-up deployment of green ammonia across coastal, inland, and eventually transoceanic shipping routes. Maritime engine developers, including MAN Energy Solutions and Wärtsilä, are already testing ammonia-compatible engine technologies for cargo and container vessels.

Industry analysts have noted that Envision’s model—combining centralized green ammonia production with distributed port bunkering—offers a replicable structure for national and regional fuel supply chains. This structure could play a foundational role in enabling zero-carbon shipping corridors, especially if port-to-port ammonia supply routes are coordinated between hubs in Asia, Europe, and the Middle East.

The project is also likely to accelerate collaboration between shipbuilders, port authorities, and energy providers in integrating dual-fuel engines and retrofitting bunkering terminals. In this context, China’s leadership in deploying real-world systems could give it a competitive edge in shaping global marine fuel standards.

What this means for the global energy transition

The Envision-led ammonia bunkering operation is being framed by stakeholders as a vital building block in the broader decarbonization of industrial energy systems. As global sectors face intensifying scrutiny over emissions, particularly in logistics and manufacturing, green ammonia is emerging as a viable carrier for renewable energy that can be transported and stored more easily than hydrogen.

Analysts following the energy transition note that ammonia, unlike other green fuels, has the infrastructure compatibility and global trade precedent necessary for accelerated adoption. With regulatory mechanisms such as the EU Emissions Trading System (EU ETS) and carbon intensity indexing under development, market-ready green fuels like ammonia could soon benefit from both compliance incentives and market premiums.

Envision’s milestone could also spur more investment into upstream electrolysis capacity and renewable infrastructure, as demand for green molecules expands beyond shipping into fertilizers, power generation, and industrial hydrogen blending. With cost parity projected within the decade for green ammonia versus gray or fossil-based ammonia, commercial scale-ups like this offer tangible pathways for systemic change.