Topsoe has agreed to supply an initial 500 MW of industrial-scale, solid oxide electrolyser cells (SOEC) to First Ammonia, a US company aiming to produce green ammonia for transportation fuel, power storage and generation, as well as fertilizer, at sites in northern Germany and the southwestern United States. The companies envisage that over the lifetime of the agreement some 5 GW of SOEC electrolysers will be supplied, potentially replacing almost 5 bcm of natural gas and eliminating the emission of 13 million t/a of CO 2 emissions. The facility to manufacture the electrolyser cells will be built in Herning, Denmark, and has recently received a final investment decisions from Topsoe’s board.