shouldn't the real alternative be in here?
http://www.energy.iastate.edu/becon/downloadNH3/AmmoniaMtg07.html

Very nice link. The solid state method of ammonia production looks very useful. I looked at another low pressure method here, which is thermal so that solar energy can be used without conversion. Might be cheaper that using electricity but the energy reduction reported in your link looks quite good.

Chris

SSAS only need part of its energy input in electricity, the rest is in heat.

Yes, I saw that in the last slide. Seems clever.