          Comments     Threshold   RE: ridiculous By Solandri on
7/13/2009 10:17:19 PM , Rating: 3 I am coming from a small
European country, where around 2/3 of all the cars are running
on propain/methane. Convertors cost several hundred dollars and
bottle of the size of spare tire is used. This solution is
essentially twise more economical than gas.  Natural gas, on the
other hand, is not kept under extreme pressure, i.e
infrastructure builds would be inexpensive. It doesn't require
refining, like the oil does. 1000 q.feet, i.e. 230 gallons of
nat gas cost around 8 dollars ....:)...It seems I will be very
happy to have a car on natural gas.  Propane and natural gas are
very different for transportation applications.  Propane
liquefies at room temperature at about 12 atmospheres. You don't
need a very strong tank to contain it. The pressure is low
enough that you can just use a simple pump to fill it, and a
simple valve to release it. In its liquid state, it has an
energy density about equivalent to gasoline