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Chemistry / Re: What is the difference between diesel fuel and petrol (gasoline)?
« on: 22/02/2007 18:47:11 »
UKmicky I don't deny diesel pollutes or that petrol pollutes or that they pollute differently.
But US research does not apply in the EU as many factors are different not least the quality of fuel. US diesel is dirty unrefined stuff and is not comparable to EU standard fuel in any way - especially bio-diesel and modern high-tech diesels like V-Power and Ultimate. Once again you are only referring to particulates from diesel - PM10s - petrol produces PM2.5s and PM5s why do you ignore these and their ill effects?
NOX yes diesel produces NOX but in very low concentrations and less now than ever dues to ever better EGR systems. But over all diesel produces less total emissions as it's greater efficiency burns less fuel in the first place.
If things are really so bad why is diesel overhaulling petrol hand over fist as the major motive fuel in the EU?
So
I am puzzled by the reference to benzene in diesel exhaust, where would that come from there is no benzene in diesel. It is added to petrol to improve octane ratings - diesel doesn't have or need an octane rating and the very reason it is added to petrol is why it WOULDN'T be added to diesel.
All your quotes relate to the USA and as such are a red herring as those conditions do not translate to the EU as very different circumstances apply and have done for a long time. In any case the EPA is well known for inflating it's case against diesel and totally ignoring the ill-effects of petrol.
OK so you prefer petrol engines, so do such paragons of logical thought as Jeremy Clarkson and Tiff Needell. I would be interested to know exactly which models of diesel car you have driven and how recently that was and when you last drove a petrol van as they are now an endangered species.
Ohh and Karen could you let me know EXACTLY what fraction of 1% of the CARS (not trucks, pick-ups or RVs)in LA are diesel powered? UKmicky states that less than 2% of ALL VEHICLES in the USA are diesel powered, so if you take out all the trucks pick-ups and RVs that cannot leave many % to be cars.
Perhaps the California Dept of Transportation could let you have the figure. I don't think it will take that long to add up.
If it is more than I think, I must say how impressed I am with the good sense of some of your countrypersons.
But US research does not apply in the EU as many factors are different not least the quality of fuel. US diesel is dirty unrefined stuff and is not comparable to EU standard fuel in any way - especially bio-diesel and modern high-tech diesels like V-Power and Ultimate. Once again you are only referring to particulates from diesel - PM10s - petrol produces PM2.5s and PM5s why do you ignore these and their ill effects?
NOX yes diesel produces NOX but in very low concentrations and less now than ever dues to ever better EGR systems. But over all diesel produces less total emissions as it's greater efficiency burns less fuel in the first place.
If things are really so bad why is diesel overhaulling petrol hand over fist as the major motive fuel in the EU?
So
Quote
diesel exhaust is a ‘likely human carcinogen’is it? Just what is the 1% benzene in petrol then?
I am puzzled by the reference to benzene in diesel exhaust, where would that come from there is no benzene in diesel. It is added to petrol to improve octane ratings - diesel doesn't have or need an octane rating and the very reason it is added to petrol is why it WOULDN'T be added to diesel.
All your quotes relate to the USA and as such are a red herring as those conditions do not translate to the EU as very different circumstances apply and have done for a long time. In any case the EPA is well known for inflating it's case against diesel and totally ignoring the ill-effects of petrol.
OK so you prefer petrol engines, so do such paragons of logical thought as Jeremy Clarkson and Tiff Needell. I would be interested to know exactly which models of diesel car you have driven and how recently that was and when you last drove a petrol van as they are now an endangered species.
Ohh and Karen could you let me know EXACTLY what fraction of 1% of the CARS (not trucks, pick-ups or RVs)in LA are diesel powered? UKmicky states that less than 2% of ALL VEHICLES in the USA are diesel powered, so if you take out all the trucks pick-ups and RVs that cannot leave many % to be cars.
Perhaps the California Dept of Transportation could let you have the figure. I don't think it will take that long to add up.
If it is more than I think, I must say how impressed I am with the good sense of some of your countrypersons.