Re:A Baking Soda Solution for Clean Hydrogen Storage
by photochemsyn on Tuesday June 13, 2023 @04:39PM
(#36316847)
It's not a greenhouse gas if you make it from atmospheric CO2, that's the whole point. Also, sending methane through a pipeline is pretty straightforward. Methanol is an option on the liquid side, but if you can make methanol from atmospheric CO2 and water, you can also make jet fuel, which will be needed as jet travel isn't really electrifiable.
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Re:A Baking Soda Solution for Clean Hydrogen Storage
by hannob on Wednesday June 14, 2023 @08:08AM
(#36324629)
That makes no sense. Methane has a global warming potential of around 28 over 100 years, meaning it causes 28x as much warming over that timeframe. It does not matter where the CO2 comes from.
What you likely mean is that when taking atmospheric CO2, burning methane does not cause additional CO2 emissions. However, that is orthogonal to the problem of methane itself as a greenhouse gas when it leaks (which by all experience it does regularly).
Re:A Baking Soda Solution for Clean Hydrogen Storage
by photochemsyn on Wednesday June 14, 2023 @11:53AM
(#36327824)
Methane is oxidized to CO2 in the atmosphere with a half-life of about 10 years, and if you're making it from atmospheric CO2 at high cost, you have strong incentives to use leakless-infrastructure to transport it - and hydrogen is more likely to have leak issues than methane, and it has a GWP issue as well:
https://acp.copernicus.org/articles/22/9349/2022/
> "It is, however, very likely that hydrogen is emitted throughout the value chain, but it is unclear – given lack of data – which components contribute most and least to emissions."