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Things take longer this time of year, and fake internet points never matter anyway.

Could be the time of day?

dupe: https://news.ycombinator.com/item?id=46368776

It didn't show any matching posts when I shared the URL.

ENH: HN: search for matching articles on debounced update to the submit URL field

Sure but if you attached a hydrogen burner would it be net positive?

Then wouldn’t you have a cleaner energy system then burning the methane directly?

The 75% and the 3:1 ratio are not related. Methane has the formula CH4, so for 12 grams of carbon you have 4 grams of hydrogen. If you successfully break down the molecule CH4 you get a carbon-hydrogen ratio of 3:1. Now, let's say you start with 5.33 kg of methane. Only 75% gets converted, so that's 4 kg. Of that, you get 3 kg of carbon and 1 kg of hydrogen.

That.. is the whole point of the reactor? It produces clean H2 to make it worthwhile as a clean fuel.

Currently H2 is clean only at the usage stage, not at the production stage. Just like electricity for EVs in Germany :)

It extremely depends on the exact reactions. I'm not a chemist but AFAIK carbon nanotube production doesn't like taking in non-carbon atoms.

Things like crystallization reactions will produce very pure products, some other reactions will absorb more contaminants.

It has nothing to do with clean energy, other than the downstream effects of cheap CNTs should the process be refined enough to scale and commercialize. The hydrogen is recycled in the process. The primary thing that it produces are CNT aerogels. However according to the paper catalyst efficiency is shit. Says less than 0.1% of catalyst particles actually grew CNTs. No wonder CNTs are currently ≥$200/kg. Needs improvement by either dramatically increasing catalyst efficiency or finding dirt cheap iron/sulfur sources.

Carbon fouling is also a major block to scale. 15-20% of carbon deposits as soot on reactor walls. At a 1MW scale thats 15-30 kg/h of crud degrading the catalytic heat transfer. Continuous cleaning or scheduled downtime would drive OPEX out of possible realities.

Hot hydrogen loops are a son-of-a-bitch and equal continuous embrittlement of pipes, valves, pumps. Seals that work at temperature. H2 Leak detection. Some real heavyweight process safety engineering here.

The reactor chemistry is solved. The paper proves it works.

The scale-up is where clean-tech startups go to burn money and die.

I'm a hardline no-fossi-fuels ever kind of guy and yes, this is clean energy.

If you collect the pollutants before emitting them and turn them into stable products, you aren't polluting.

Ergo, clean.

Not sure what's wrong here. They said clean, not renewable right?

It's clean, but it's still non-renewable. Oil companies have to keep finding ways to greenwash themselves.

Yes, did you read it? Hydrogen and solid carbon, so the result is no greenhouse gas emissions.