3 ms·
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. Met
by photochemsyn 3y ago
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.
- hannob 3y agoThat 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).
- photochemsyn 3y agoMethane 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/ 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."