Diesel trains have been rattling down tracks for so long that most of us stopped thinking about what comes out of their exhaust. Now there's a quieter alternative showing up on a handful of railway lines around the world, one that runs on hydrogen instead of diesel and leaves behind nothing but water vapour. With India rolling out its first hydrogen train, the question a lot of people are suddenly asking is a fair one: how many countries actually have these things?Given how much buzz hydrogen gets as the fuel of the future, you'd think half the world would be running these trains by now. They're not. Most countries are still stuck in the testing phase, running the numbers, or trying to figure out where the refuelling stations would even go.
So what's actually different about a hydrogen train?
A diesel engine burns fuel. A hydrogen train doesn't burn anything at all. It carries hydrogen onboard, and inside a fuel cell, that hydrogen reacts with oxygen from the air to produce electricity, which then drives the motors the same way a battery would. What comes out the other end is water vapour and a little warmth, nothing else."In a sense, the train once again carries its own source of power, as steam and diesel locomotives once did. But instead of burning traditional fuels such as coal or diesel, hydrogen generates electricity inside the train using oxygen from the atmosphere, eliminating combustion and dependence on an external power supply. As electricity is generated onboard through clean hydrogen technology, the train represents the greenest form of rail propulsion, powering the future of sustainable mobility. To complement this advanced propulsion system, India has equipped the train with multi-layer safety systems capable of detecting hydrogen leaks, heat, flames and smoke. With an operational speed of 75 kmph on the Jind–Sonipat section and a design speed of 110 kmph, the train is not only safer but also faster on this 89 km route," the Centre said on Friday.
Only a few countries have actually gone all in
People have been talking about hydrogen trains for close to a decade now. As per Reuters, India joins a select group of countries, including Germany, Japan, China and the United States, with such trains. Hydrogen-powered trains are still at a nascent stage globally. Germany became the first country to introduce commercial hydrogen passenger trains, while France, Italy, China, Japan and a few other countries are pursuing pilot projects or limited deployments.Germany's the one country that's genuinely moved past the trial stage. It was first to put hydrogen trains into regular commercial passenger service, and it's kept expanding that fleet across its regional network ever since.
Where India fits into this
India's first hydrogen train just entered that small club, launching on the Jind-Sonipat section in Haryana under the Ministry of Railways. It's part of a much larger effort to cut emissions across a railway network that's genuinely massive, one of the biggest in the world by any measure.That scale is what makes this launch worth watching beyond India's own borders. If hydrogen tech holds up here, on a network this size and this varied, it could shape how other countries with sprawling, partly unelectrified rail systems decide to approach the same problem down the line.