Japan is taking an important step in the energy transition with the first commercial large gas engine capable of generating electricity by burning a fuel blend containing up to 30% hydrogen and natural gas. The engine was developed by Kawasaki Heavy Industries and is part of the KG series. It is designed for distributed power plants in the 8 MW class. Sales began after 11 months of testing at the Kobe Works, which started in October 2024 and examined how the system performs under real-world conditions, not only in a laboratory.
The main idea is to enable the transition to lower emissions without fully replacing existing infrastructure. With a fuel blend containing up to 30% hydrogen, part of the carbon emissions per kilowatt-hour produced can be reduced, especially if the hydrogen is produced through a low-carbon route. According to Kawasaki, many of the older KG series engines, with more than 240 orders worldwide since 2011, can be upgraded to operate with the same hydrogen blend. This allows existing gas-fired power assets to extend their service life and gradually reduce their emissions, instead of being replaced entirely.
Image showing a hydrogen-ready gas engine representing Japan’s new commercial system for generating electricity with fuel blends containing up to 30% hydrogen.
Safety is a key part of the development, because hydrogen is more difficult to control than methane: its molecules are very small, it can pass through seals, and it ignites across a wider range of mixtures with air. For this reason, the engine includes hydrogen leak sensors along the fuel path and a nitrogen purging system for startup, shutdown, or fault conditions. The development is also linked to Japan’s broader approach to the hydrogen economy — from engines for power plants to marine engines, liquid hydrogen terminals, and future supply chains. The main condition remains the availability of enough clean hydrogen: the engines may be ready before the fuel itself is available in large quantities.
Source: https://www.ecoticias.com/en/2026-japan-will-launch-the-first-commercial-engine-that-generates-electricity-by-burning-a-mixture-containing-up-to-30-hydrogen-with-a-warranty-and-upgrade-option-after-11-months-of-testing-in-k/29391/
Images: https://www.ecoticias.com
