4 ms·
The critical point is at 7.4 MPa (74 bars) and 304 K (30 C) - there the density is 470 kg/m^3. Here's the phase diagram. http://www.wolframalpha.com/input/?i=c
by Gravityloss 14y ago
The critical point is at 7.4 MPa (74 bars) and 304 K (30 C) - there the density is 470 kg/m^3.
Here's the phase diagram.
http://www.wolframalpha.com/input/?i=co2+critical+point&a=*MC.~-_*Thermodynamic- http://www.wolframalpha.com/input/?i=co2+critical+point&...
According to this http://web.anl.gov/PCS/acsfuel/preprint%20archive/Files/45_4_WASHINGTON%20DC_08-00_0726.pdf http://web.anl.gov/PCS/acsfuel/preprint%20archive/Files/45_4... the pressures in depleted natural gas wells are 20-40 bars so it's not as bad as I expected.
Never seen any numbers so had to go look.
- nitrogen 14y agoI think once you consider the water vapor that is also generated from burning natural gas, storing the resultant CO2 in the same space might actually be possible. I suppose I could do an actual calculation based on the molecular weight of H20 and reading up on the combustion stoichiometry of methane et al., but I'm not a chemist by any stretch of the word, and I've got other things to do :).
- Gravityloss 14y ago1 CH_4 + 2 O_2 -> 1 CO_2 + 2H_2O So the amount of CH4 and CO2 is the same in number of molecules, which also means they are the same volume of gas (at low pressures). Of course the mass of CO2 is about three fold but that doesn't mean much.