What is the energy penalty for separating, liquifying (by compression
and cooling), and injecting the liquid CO2 into a suitable permanent
storage medium? There's also ash, sulfur and mercury and other
pollutants to deal with (some of the ash constituents might be of
marginal commercial value--it's said the uranium content of some coals
has more energy than the coal itself).
Still seems like it's just sweeping the problem under the rug, almost
literally. A rupture to the surface of a storage facility could flood
large areas with CO2; this has occured naturally with hundreds or
thousands of deaths.
Posted by hhc314 on September 14, 2008, 6:34 pm
Wouldn't it make greener sense to sell the liquified CO2 to a fire
extinguisher manufacturer or two anyther industry that uses it in a
manufacturing process (say a ceramics firm that is producing certain
type products or a soda water firm or beer producer?)
I sort of like the fire extinguisher idea, because the CO2 is then
used to knock down fires that otherwise would produce more CO2 than
that used in extinguishing the fire.
Just a crazy thought, because CO2 has so many valuable in uses in
industry and agriculture (greenhouse farming for example).
Posted by Russ in San Diego on September 16, 2008, 5:15 am
On Sep 14, 11:34am, hhc...@yahoo.com wrote:
Probably not. First of all, it's pretty easy to acquire CO2. Second,
the quantity of CO2 used in industry (culinary and otherwise) is tiny
compared to the amount that would have to be sequestered if you really
were trying to combust what is relatively close to pure carbon
(coal). I'd like to see the energy budget on combustion of coal while
Frankly, I'm more concerned about the danger associated with vast
quantities of concentrated CO2 than I would be about nuclear fission
byproducts. CO2 is inherently very mobile stuff if it escapes
containment. And it stays low to the ground, displacing oxygen until
and unless dispersed by wind. Not benign stuff in quantity.
Posted by Fred Kasner on September 19, 2008, 3:57 am
I fear any such thing as CO2 storage underground. I see it eventually
leading to a disaster similar to, but on a larger scale, the event of
release from a lake bottom of CO2 in Camaroon that killed many people.