Green ammonia and how it relates to concentrated solar power

ammonia as CSP heat storage
Schematic diagram of an ammonia thermochemical storage system using high-temperature solar concentrators. Source: Keith Lovegrove, Adrienne Lavine, Hamarz, Aryafar and Chen Chen: Leveraging the Ammonia Industry for Solar Energy Storage.

By Xavier Lara

Green ammonia: if you haven’t heard of it yet, then pay attention. It could play a key role in the energy transition. And it could be important for CSP in several ways. This is a big deal because ammonia today is the world’s second largest chemical commodity, used primarily to create fertilizer.

Global production capacity of the colorless, pungent gas is expected to expand from around 235 million metric tons in 2019 to almost 290 million metric tons by 2030. But its production today, via a chemical pathway called the Haber-Bosch process, is very carbon intensive.

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