Exhaust of 3,000 Litres of Diesel Replaced with Just Water Vapours: The Story of India's Hydrogen Train

📌 Summary:

• India's first Hydrogen Train was flagged off between Jind and Sonipat (near Delhi) on 17 July 2026; it has since run over 1,200 km, saving more than 3,200 litres of diesel
• It generates electricity onboard through a chemical reaction between hydrogen and oxygen (fuel cells), emitting only water vapour — no smoke and no tailpipe carbon emissions, making it the cleanest form of rail propulsion currently available
• Indigenous effort led by Indian Railways: 10-coach train with two Hydrogen Driving Power Cars delivering 2,400 kW total, backed by lithium iron phosphate batteries and hydrogen cylinders
• Green hydrogen stored at up to 500 bar and dispensed at 350 bar, with ~3,000 kg storage at Jind — Railways' first dedicated hydrogen storage facility
• Multiple independent safety systems (leak/heat/flame/smoke detection, automatic shut-off, continuous ventilation) meet international standards; trials on the Delhi route to begin soon

🎯 UPSC Relevance: GS3 Science & Technology / Environment — hydrogen fuel cells, green hydrogen, decarbonising transport and India's clean-energy transition.

📝 Prelims Facts:

• First hydrogen train route: Jind–Sonipat, flagged off 17 July 2026
• Power: 2,400 kW from two power cars; batteries = lithium iron phosphate
• Green hydrogen: stored up to 500 bar, dispensed at 350 bar; ~3,000 kg storage at Jind
• By-product: only water vapour

🔑 Key Term: Green hydrogen — hydrogen produced using renewable energy; in a fuel cell it reacts with oxygen to produce electricity, emitting only water.