Re: purge a oil tank for safty

On Fri, 26 Sep 2008 20:46:48 -0700 (PDT), John Martin
<jmartin957@xxxxxxx> wrote:
On Sep 26, 9:48 pm, Winston <Wins...@xxxxxxxxxxxxxx> wrote:

Flue gas has almost no CO (70 - 160 ppm) It is a mixture of about
94% nitrogen and carbon dioxide and a little oxygen.

I'm a bit curious as to how the combustion process has increased the
nitrogen percentage, from about 80% in the air going in to the 94% of
the flue gas.

You use all the oxygen in the air for combustion, and don't generate
all that much carbon dioxide in return. And you generate water vapor
(H2O), that doesn't count as a gas. That's how the nitrogen content
increases, because the other stuff decreases or converts.

Now note that the "flue gas" they are using is from a Diesel engine,
NOT Gasoline. Or they could be burning bunker oil in a big Wartsilla
bazillion-CID marine diesel if they preheat it first.

Gasoline engines built pre-catalyst can have significant CO in the
exhaust (not to mention some unburned gasoline ftrom incomplete
combustion at idle) and that's what has everyone here worried enough
to NOT use it as a blanket suggested method of purging a tank.

--<< Bruce >>--

.

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