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CriticalUnit t1_ivf1l6y wrote

Reply to comment by The_RealKeyserSoze in Dutch pilot project for hydrogen heated homes allowed to begin by alex20_202020

> And when you burn it you get water not CO2.

But you do still get NOx emissions....

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The_RealKeyserSoze t1_ivh9z09 wrote

That’s true, but its still a massive improvement compared to what we currently use (oil and gas). Heat pumps would be ideal.

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CriticalUnit t1_ivj33ow wrote

Sure green hydrogen is better than what we currently use in terms of emissions. The problem is that it's not the best option available to replace what we currently use.

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Omateido t1_ivfay6m wrote

From burning H2?

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realityChemist t1_ivfg3ij wrote

Yes.

If you burn hydrogen in pure oxygen you won't get any, but typically we burn things in air. Air is about 78% nitrogen, and even though N2 is pretty damn unreactive when you have so much of it hanging around in a hot flame, some of it will get oxidized. The hotter the flame, the more you get (and hydrogen burns very hot).

My understanding is that you can burn H2 with about 2x the theoretically required amount of air to reduce the amount of NOx emitted to basically nothing, but that's also going to reduce the efficiency of your boiler, so it's a tradeoff.

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MilkshakeBoy78 t1_ivfc0aq wrote

h2o, is 2 hydrogens and one oxygen. doesn't h2o becoming hydrogen just split the hydrogen and oxygen. how is nitrogen or no emitted?

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