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by cranky908canuck 971 days ago
>> ... would this method result in less CO2 emissions using regular grid >> electricity, or would it need to be 100% low-carbon electricity? ...

Who cares? This is about electricity to ammonia.

Given: a very efficient way to make ammonia (as an energy store) using electricity, this becomes a storage mechanism. So then, make ammonia and money whenever the grid is in a 'pay to take power' state, and (up to a point) even if you have to pay. End source is irrelevant.

Alternate process: run a solar farm, produce ammonia whenever that's cheaper than paying someone to take the power (or curtail), then sell the stored power when prices are high. Or, sell the ammonia directly.