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Energia pulita, la Cina collega alla rete il nuovo generatore a CO2 supercritica

Clean energy, China connects new supercritical CO2 generator to the grid

DigiTech.News | Local Language | News | Nov. 28, 2025 | UndeterminedEnergy Prices

China has connected the world’s first commercial supercritical carbon dioxide (CO₂) generator to the power grid at a steel plant in Guizhou province. The system utilizes waste heat from steel production to generate electricity more efficiently than traditional steam plants. It features two 15-megawatt units offering efficiency above 50%, compared to the 40% typical for high-temperature steam plants, by transferring heat using supercritical CO₂ rather than steam.

The technology relies on maintaining CO₂ in a supercritical state, with both liquid and gas properties, under high pressure and temperature, allowing for a more compact design. This compactness makes the generator suitable for applications in confined spaces such as mobile nuclear reactors, spacecraft, solar plants, and naval installations. The generator’s higher density CO₂ cycle permits smaller plant designs without sacrificing power output, making it an attractive option for industrial, nuclear, and space sectors.

Internationally, similar developments are underway. The U.S. completed a 10 MW Supercritical Transformational Electric Power (STEP) pilot project in Texas in 2023, operating initially at 500°C and producing 4 megawatts, aiming to achieve 10 MW at temperatures above 700°C. China’s achievement, backed by its Nuclear Power Institute’s long-term work, represents a significant advancement in clean energy, potentially replacing steam turbines and expanding supercritical CO₂ technology’s use worldwide.

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