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Old 03-19-2005, 02:01   #1 (permalink)
Some ga
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I got it ! I've figured it out.... The answer is........... An Orgy in Alberta

And for $100.00 the question was...........

If the name change is indicative of a future event, what future event
is predicted by the name change to "3 dog nite"?


What do I win Alex? I'm not too familiar with the game show formats.


WRT our resident troll:
It appears that he needs to know what temperature NOx forms at. That
would be 1,500 Celsius / 2,732F or 1773 K

Now for a bit of background to help hiim understand "the why" of the
big three.

Natural sources of nitrogen oxides NOx include volcanoes, lightening
strikes and biological decay. Aprox 20 million and 90 million tons
per year of NOx are released from natural sources, compared to around
24 million tons from human activity.

On to Carbon Dioxide it has been suggested that carbon dioxide from
power generation be bubbled into ponds to grow algae that could then
be converted into biodiesel fuel. High level of carbon dioxide in the
atmosphere effectively exterminate many pests. Greenhouses often
raise the level of CO2 to 10,000 ppm (1%) for several hours to
eliminate pests such as whitefly, spider mites, and others. Volcanic
activity now releases about 130 to 230 teragrams (145 million to 255
million short tons) of carbon dioxide each year. Burning fossil
fuels such as coal and petroleum is believed to be the leading cause
of increased MAN MADE CO2; deforestation the second major cause

The exhaust of an engine, when burning a carbon-based fuel contains
carbon monoxide, especially when the temperature is too low to effect
complete oxidation of the hydrocarbons in the fuel to water and CO2,
because the time available in the combustion chamber is too short, or
because there is insufficient oxygen present. Usually, it is more
difficult to design and operate a combustion for very low CO than for
very low unburned hydrocarbons.

Toxic car gases such as unburned hydrocarbon (UHC) and carbon monoxide
(CO) would not exist if the fuel to energy conversion in the engine
were perfect.

A three-way catalytic converter has three simultaneous tasks:

oxidation of carbon monoxide to carbon dioxide: 2CO + O2 ---> 2CO2
reduction of nitrogen oxides to nitrogen: NOx ---> O2 + N2
oxidation of hydrocarbons (unburnt fuel) to carbon dioxide and water:
CxHy + O2 ---> xCO2 + H2O
These three reactions are most balanced at the stoichiometric point,
where there is a balanced amount of oxygen to fuel in the engine. When
there is more oxygen than required, then the system is said to be
running lean, and the system is in oxidizing conditions. The above two
oxidizing reactions (oxidation of CO and hydrocarbons) are favoured.
When there is more fuel than oxygen (stoichiometrically), then the
engine is running rich. The reduction of NOx is favoured.

So now you have a bit of a background into the chemicals that a "cat"
controls some temperatures

Now back to those "sky is falling sciensticians". If "mother" nature
fluctuates by 70 million tons per year of NOx emisions, perhaps we're
looking at the global warming picture from the wrong angle..... Just
my take.

As there was the talk of Cat Meltdowns & as you won't believe anything
that I'd write, check this link:
http://www.ultimategarage.com/catalyst.html

Catalytic Converter Meltdown - under certain conditions, the catalytic
converter can be overheated to the point of ceramic meltdown or
starting a fire. There is nothing in a catalytic converter that is
combustible...construction is ceramic and stainless steel. What causes
the excessive heat (which can approach 2000F) is raw fuel being dumped
into the converter because of leaky injectors, faulty O2 sensor,
ignition problems, etc....if your engine is developing a steady
misfire, DO NOT CONTINUE DRIVING THE CAR!!! Converter or engine
failure could be eminent.

When a converter overheats, the heat shields will become extremely hot
and could ignite any combustibles touching it or within close
proximity (eg, an out of place fuel hose or leaves on the road).
Eventually, the ceramic will melt and puddle near the cat inlet
blocking the exhaust flow....the engine will stop running due to the
excessive back pressure.

BMW does a nice job of engineering their catalytic converters to
minimize fire risk by surrounding the catalyst with heat shields
(DEC's shielding is not quite as extensive), often installing shields
on the underbody of the car as well. BMW's (and all other cars) are
now (96-on) required to have 2 oxygen sensors... one before and one
after the cat. Significant temperature variances between the two will
trigger a check engine light on the dash. (Note, early 80's Ferrari's
had an exhaust temp probe to monitor exhaust temperatures).

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Old 03-19-2005, 05:01   #2 (permalink)
Backyard Mechanic
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as it happens. re: pollution.....


As to CO2:

http://tinyurl.com/58pnu
"Even if people stopped pumping out carbon dioxide and other pollutants
tomorrow, global warming would still get worse, two teams of researchers
reported on Thursday."

BUT!!!

Greenhouses use additional CO2 to promote growth

http://tinyurl.com/4fcpf

So... Alberta needs global warming so as to grow more lettuce


--
- Yes, I'm a crusty old geezer curmudgeon.. deal with it! -
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