Methane has a much lower boiling point (-182 C) than propane (-42 C), so liquefy...

sliverstorm · on Nov 23, 2012

Can you not simply roughly double the pressure you store it at? Or is LPG already stored at borderline risky pressures.

DaniFong · on Nov 23, 2012

Vapor pressure is exponentially related to temperature; you really need to keep it cold.

surrealize · on Nov 23, 2012

If you really want to produce a liquid transportation fuel from methane, the usual approach is F-T synthesis:

http://en.wikipedia.org/wiki/Fischer%E2%80%93Tropsch_process

Generally, it hasn't been very economical to do so, although I wonder what the numbers are now that we've got so much natural gas production in the US.