India's Hydrogen Train: Innovation, Infrastructure and the Road to Net Zero

For nearly 170 years , Indian Railways has evolved from steam locomotives to diesel engines and, more recently, to one of the world's largest electrified rail networks . On Friday, Prime Minister Narendra Modi will flag off India's first hydrogen-powered passenger train between Jind and Sonipat in Haryana. More than the inauguration of another railway service, the event marks India's first attempt to harness hydrogen fuel-cell technology for passenger transport, placing the country among a select group of nations exploring hydrogen as the next frontier in sustainable mobility.

Yet, the significance of the project extends far beyond a single train or a new route. It represents the creation of an entirely new railway ecosystem from producing green hydrogen and building dedicated refuelling infrastructure to manufacturing indigenous fuel-cell technology and training railway personnel for a completely different propulsion system. At a time when India has already electrified more than 95% of its broad-gauge railway network , the hydrogen train is not designed to replace electric locomotives but to offer a cleaner alternative to diesel on routes where electrification remains technically difficult or economically unviable. Whether this pilot evolves into a transformative technology or remains a niche solution will depend on its operational success, economic viability and India's ability to build a robust hydrogen ecosystem in the years ahead.

How Hydrogen Powers a Train

Unlike conventional diesel locomotives that generate power by burning fossil fuels, or electric trains that rely on overhead power lines, the hydrogen-powered train produces electricity onboard through hydrogen fuel cells . The train carries compressed hydrogen in specially designed high-pressure cylinders. Inside the fuel-cell stack, hydrogen reacts with oxygen drawn from the atmosphere in an electrochemical process that generates electricity, water vapour and heat. Since there is no combustion, the train emits only water vapour , eliminating carbon dioxide, particulate matter, sulphur oxides and nitrogen oxides released by diesel locomotives.

The electricity generated by the fuel cells powers the train's electric traction motors, while onboard lithium-ion batteries provide additional energy during acceleration and steep gradients. These batteries also store electricity generated through regenerative braking, making the propulsion system highly efficient.

From Water to Wheels: The Green Hydrogen Cycle

The journey of hydrogen begins much before the train starts moving. Water ( H₂O ) is subjected to electrolysis , a process in which electricity is passed through water to split it into hydrogen (H₂) and oxygen (O₂) . The hydrogen gas is then collected, compressed to very high pressure and stored in specialised storage tanks. From there, it is transferred into the train's onboard cylinders through dedicated refuelling equipment. When renewable electricity generated from solar or wind energy is used for electrolysis, the resulting fuel is known as green hydrogen , making the entire energy cycle virtually carbon-free.

Once the hydrogen is filled into the train, it is supplied to the onboard fuel-cell stack, where it combines with oxygen from the atmosphere to generate electricity. This electricity powers the traction motors that drive the train, while the only direct emission is water vapour . The train carries approximately 440 kilograms of compressed hydrogen , enabling it to travel around 250 kilometres on a single refuelling . To support the pilot project, Indian Railways has established the country's first dedicated railway hydrogen production, storage and refuelling facility at Jind , equipped with hydrogen compressors, dispensing systems, leak detectors, flame sensors and automatic emergency shut-off mechanisms. The pilot's cabin and refuelling station have also been specially designed with multiple safety systems to ensure secure operations.

A Made-in-India Engineering Milestone

Designed, engineered and integrated entirely in India, the hydrogen-powered train reflects the country's growing capability in advanced railway technology under the Atmanirbhar Bharat initiative. It has been manufactured by the Integral Coach Factory (ICF), Chennai , while technical specifications have been developed with support from the Research Designs and Standards Organisation (RDSO), Lucknow .

The 10-coach trainset , powered by a 1,200-kilowatt hydrogen fuel-cell propulsion system and a 3,200 HP propulsion package , is among the longest and most powerful hydrogen-powered passenger trainsets developed anywhere in the world. It will operate at a maximum speed of 75 kmph on the 89-km Jind–Sonipat corridor, covering the journey in around two hours with 12 intermediate stations .

A Pilot, Not a Replacement for Electric Trains

Experts caution against viewing hydrogen as the future of all railway transportation. More than 95% of India's broad-gauge railway network has already been electrified , making electric traction the most efficient and economical solution for high-density corridors. Hydrogen trains are therefore expected to complement, rather than replace, electric trains by serving routes where overhead electrification is technically difficult or financially impractical. These include heritage railways, mountain railways, remote branch lines and low-density regional corridors.

The current Jind–Sonipat service is a pilot project intended to evaluate fuel efficiency, maintenance costs, reliability, passenger acceptance and operational safety before wider deployment. The project, estimated to cost around ₹136 crore , is expected to provide valuable operational data that will determine whether hydrogen-powered trains can become commercially viable under Indian conditions.

Where Will Hydrogen Trains Run Next?

Indian Railways has earlier announced plans to introduce 35 hydrogen-powered trains under its "Hydrogen for Heritage" initiative. Although only the Jind–Sonipat corridor has been officially launched so far, routes such as the Kalka–Shimla Railway , Darjeeling Himalayan Railway , Nilgiri Mountain Railway , Kangra Valley Railway and Matheran Hill Railway have been discussed during the planning stage as potential candidates because electrifying these heritage and hill sections would be technically challenging and economically expensive.

Building an Entire Hydrogen Ecosystem

Expanding hydrogen rail operations requires much more than manufacturing additional trains. India will need large-scale green hydrogen production plants , electrolysers, renewable energy integration, hydrogen storage terminals, compression stations, dedicated refuelling depots, specialised maintenance workshops and a domestic manufacturing ecosystem capable of producing fuel-cell stacks, hydrogen cylinders, compressors and power electronics.

Railway stations designated as hydrogen hubs will require backend modifications, including storage tanks, dispensing equipment, leak detection systems, fire suppression mechanisms and specialised maintenance depots. Extensive training programmes for loco pilots, engineers, maintenance staff and emergency responders will also be essential, as operating hydrogen-powered trains involves handling high-pressure gas systems, fuel-cell technology and sophisticated electrical equipment.

What the World Can Teach India

Globally, India joins countries such as Germany, France, Japan, China, Italy, South Korea and the United States in exploring hydrogen-powered rail transportation. Germany pioneered the world's first commercial hydrogen passenger train in 2018 , demonstrating that hydrogen can successfully replace diesel on selected regional routes where electrification is difficult. International experience, however, shows that widespread deployment depends on affordable green hydrogen, reliable refuelling infrastructure and carefully selected routes.

Research also highlights the challenges ahead. A 2024 study published in the journal Joule by researchers at the University of Michigan found that battery-electric transport is generally three to eight times more energy efficient than hydrogen-powered systems in many applications. Nevertheless, hydrogen remains particularly attractive for heavy-duty sectors such as railways, freight transport, shipping and aviation, where batteries face limitations in payload, range and charging time.

The Road Ahead

According to India's latest Biennial Update Report submitted to the United Nations, the transport sector contributes more than 13% of the country's energy-sector emissions. While road transport accounts for about 94% of these emissions, railways contribute only around 1% , making Indian Railways one of India's cleanest transport systems. Even so, replacing the remaining diesel-powered operations with hydrogen on suitable routes could further strengthen the railway's environmental credentials while reducing dependence on imported fossil fuels.

Railway Minister Ashwini Vaishnaw has consistently described hydrogen-powered trains as an important element of Indian Railways' long-term decarbonisation strategy. Rather than competing with electrification, hydrogen is expected to complement it by offering a zero-emission solution wherever extending overhead electric lines is not practical. At the same time, the project supports the National Green Hydrogen Mission , strengthens the Make in India initiative and builds domestic expertise in one of the world's fastest-growing clean-energy technologies.

Ultimately, the success of India's first hydrogen-powered train will not be measured by its inaugural journey alone. It will depend on whether Indian Railways can produce affordable green hydrogen, develop indigenous manufacturing capabilities, build a nationwide refuelling network and demonstrate that hydrogen-powered trains are safe, reliable and economically viable. If those goals are achieved, the train departing from Jind will be remembered not merely as India's first hydrogen-powered passenger service, but as the moment Indian Railways began laying the foundation for the next generation of sustainable mobility.