Re: Off Topic - "An Inconvenient Truth"

In message <1146938756@xxxxxxxxx>, Wayne Throop <throopw@xxxxxxxxx>
writes

Except aiui gassified coal has none of the impurities that cause SO2
and radioactivity; they've necessarily been removed

The sulphur content of the coal gas may be reduced but some of it will
be released in the gasification process. Processing at the wellhead can
remove some (and hopefully nearly all) of it but it's an extra expense
and then the gas has to be disposed of anyway. Ditto for the radon gas
which is the major component of the release of radioactivity consequent
on coal-mining and coal-burning. The ppm concentrations of uranium and
thorium in coal tend to stay underground in in-situ coal gasification.

Coal gasification is very inefficient when applied to shallow
good-quality coal seams, but it can be cost-effective if the coal is
deep, fractured and low-quality. There just has to be enough of it in
one place to justify the capital expenditure in the drilling rigs and
process equipment installed to exploit it. Higher fuel costs mean more
marginal sources become worth exploiting, assuming the prices stay high.
--
To reply, my gmail address is nojay1 Robert Sneddon
.

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