Leigh, it is NOT CNG either. It is just natural gas, the same as
what comes out of your kitchen stove under (less) pressure. It is
pressurized to push it through the pipe, but "compressed" as in CNG
is different. CNG = "compressed natural gas" is pressurized -- at a
much higher pressure than at your kitchen stove -- into a tank, such
as a small tank on a pick-up truck, which would be ignited to drive
the truck engine. Compressing it makes it take up less space.
LNG is liquified natrual gas -- liquified by being cooled to
something like minus 150 degrees Celcius.
You've got the terminus end backward. LNG, transported by tanker,
is liquified at the source and gasified at the terminus, not
liquified. It is then put into a regular pipeline to be delivered to
your kitchen stove.
As far as commenting on the article you forwarded, I have no idea of
the condition of the bottom of the Baltic sea. I suspect the dispute
is more about the route of the pipeline and the attendant advantage
or disadvantage to one country or another.
Gene Coyle
On Aug 25, 2006, at 11:25 AM, Leigh Meyers wrote:
Eugene Coyle wrote:
It is NOT an LNG pipeline. It is a natural gas pipeline. LNG is not
transported by pipe.
Gene Coyle
.
So, the headline stands corrected, it's CNG which I believe DOES
liquify
the gas. It just doesn't have the other advantages of LNG stated
below,
and anyway, the CNG will be most likely converted to LNG once it
reaches
it pipline terminus.
Advantages:
.
LNG can be very useful, particularly for the transportation of
natural
gas, since LNG takes up about one six hundredth the volume of gaseous
natural gas.
.
Further, it's safer to transport and many of the impurities are
removed
(why transport waste material?).
.
LNG, when vaporized to gaseous form, will only burn in concentrations
of between 5 and 15 percent mixed with air. In addition, LNG, or any
vapor associated with LNG, will not explode in an unconfined
environment. Thus, in the unlikely event of an LNG spill, the natural
gas has little chance of igniting an explosion. Liquification also
has
the advantage of removing oxygen, carbon dioxide, sulfur, and water
from the natural gas, resulting in LNG that is almost pure methane.
http://www.naturalgas.org/lng/lng.asp
Other than harping on a mis-statement in the subject line, any comment
on the content of the article?
Leigh
http://leighm.net/
