Otto Aviation Group LLC Celera 500L

Nicknick

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since ozone is a greenhouse gas in the troposphere but the opposite in the stratospere, it would be useful to fly as high as the Celera. But I highly doubt that NOx or Ozone will remain in any athosphere for 100 years, there is way to much mixing going on.

NOx and Ozone at the ground have a very short life expactation of several hours to a couple of days, no way that any of them will remain in the athmosphere for 100 years!
 

Nicknick

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there is no doubt that CO2 can rise up from the ground level to stratosphere otherwise it wouldn’t affect the Klima. Also, FCKW and other refrigerants can rise up from the ground level to the stratosphere, but Ozone, NO, NO2 and N2O will always stay in the same height for decades??? This is ridiculos!
 

riggerrob

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No, that's not correct. The combustion process of a Diesel is much more complete thant that of a gazoline engine due to the fast burn rate (high compression ratio) and surplus Air. Otto engines have higher combustion temperatures due to the (in most cases) almost stiochiometric combustion. There is a NOx peak at Lambda 1,1 (10 % exess air) which is about the ratio gazoline aircraft engines are operated for max. efficiency (leaning). Diesel engines are operated at much leaner Lambda in cruise flight which reduces NOx emissions.

In a car, the conventional catalyst will emininate almost all NOx as long as Lambda is </= 1, with lean burn, it will be much more effort (by using Urea, of NOx trap with periodical regeneration).

I don't know the situation in the US, but in Europe the suphur content of Diesel fuel is equal to Otto fuel, it depends on the regulation, not on the engine parameters.

Do you have any quatation about NOx affecting the Ozone layer?

Similar in Canada where most diesel trucks are placarded: "Low-sulphur diesel fuel only." This is not an issue at filling stations because Canadian stations are only allowed to stock low-sulphur or no-sulphur diesel fuel.
 

TomcatViP

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The problem with Europe is that the devil has already done his deed.
It's 20 years ago that Europe should have banned diesel engines for personal transportation and controlled diesel quality. Instead they ramped it up full speed (some countries with weak automotive prospects leading the charge) just to shield their industry from foreign imports. *

Now, it's too late... And we have passed over our murderous fleet of dusty vehicles to Africa and they thanks us through global air mass circulation. Something that would stand for the next couple of decades, probably.

*France is still allowing heavy duty fuel from the cheapest grade into the shipping industry, a major contributor of Nox emissions through that usage of low grade fuel. Very few countries still allow that.
 

Nicknick

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The air in Europe is as clean as never before! Since about 1990 the NOx, Soot, HC and Co emissions went down continously and are just a fraction of everything meassured before. Of course, we never meassured the pollution of the 19 th century or the medial age, but it was shurly worse than in the late 20 th century with all its fires (backeries, blacksmith, cooking etc. in every house.
 
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