3 ms·
Quick search says 1.2kg/kWh theoretical max: https://www.sciencedirect.com/science/article/abs/pii/S0042207X1830366X https://www.sciencedirect.com/science/artic
by opportune 3y ago
Quick search says 1.2kg/kWh theoretical max: https://www.sciencedirect.com/science/article/abs/pii/S0042207X1830366X https://www.sciencedirect.com/science/article/abs/pii/S00422...
Each ozone molecule at 48g/mol I think will map to 2/3 of an ammonia molecule at 17g/mol. So you’d get 0.23kg NH3/kWh. And I found a link saying the actual Haber Bosch energy usage requires 26GJ/ton which is 3.6kWh/kg or 0.27kg NH3/kWh: https://www.sciencedirect.com/topics/engineering/haber-bosch-process https://www.sciencedirect.com/topics/engineering/haber-bosch...
Anybody feel free to check my math. Worth noting actual Ozone yields are supposedly much lower than theoretical maxes at around 12% efficiency (which may require cryo temps and pure oxygen under pressure) bringing yield down to 0.03kg NH3/kWh. Doesn’t seem to take lower electricity in practice considering this is only one energy requirement vs the haber Bosch process counting the full energy input, though maybe it’s less capital intensive. I guess Ozone is deceptively hard to make because the little ozone generators we use as disinfectants require very little actual ozone to do their job.
- duped 3y agoThe interesting part isn't whether it's more or less energy efficient to me but whether it can be done entirely with renewables.
- tourmalinetaco 3y agoThat could be a decent take if not for the fact that “green” energy is incredibly inefficient, and most of the world is anti-nuclear. At the end of the day its not even about how renewable or energy efficient something is, it’s about what’s cheap. And multibillion dollar companies will always go for what’s cheap, regardless of the environmental impact.