Erfahrungen mit Biodiesel | Posts 16+

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By the way, biodiesel producers claim that the lower energy content of biodiesel is offset by a higher combustion efficiency.

... whoever believes that... how do they explain the sometimes significantly higher consumption? But who readily admits that their product is flawed?

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(at least, the higher NOx levels suggest a different combustion process)

... which doesn't mean it's better. What about CO2 emissions? Could it be that the "eco" product is more toxic/harmful to the environment (without considering the overall environmental impact - just what is released qualitatively and quantitatively from the exhaust) than the "conventional" fuel? Does anyone have any numbers?

R.M. wrote:

... which doesn't mean it's better. What about CO2 emissions? Could it be that the "eco" product is more toxic/harmful to the environment (without considering the overall environmental impact - just what is released qualitatively and quantitatively from the exhaust) than the "conventional" fuel? Does anyone have numbers?

RME has a carbon footprint that is 30% lower than that of conventional diesel.
I'm not entirely sure whether all aspects of the production process were actually included in this.
It is clear, however, that the greenhouse gas emissions from nitrous oxide, which is produced by the rapeseed plant during its growth, are not included in the calculation. Because nitrous oxide causes a much higher greenhouse effect than CO2.

In my opinion, Dino is still the best solution, as the world, millions of years ago when oil and coal were still CO2 in the atmosphere, apparently managed to cope with it.

The only thing that makes Pöl appealing to me is that Austrian farmers haven't blown themselves up yet, Pöl is cheaper, and it smells better.

Hello,

R.M. wrote:

Quote: (at least, the higher NOx levels suggest a different combustion process) ... which doesn't mean that it's better.

Higher NOx levels generally indicate a more efficient combustion process.

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How about the CO2 emissions? Could it be that the "eco" product is more toxic/harmful to the environment (without considering the overall environmental impact - just what is qualitatively AND quantitatively emitted from the exhaust) than the "dino juice"? Does anyone have numbers

?

Generally, the pure emissions of RME (rapeseed methyl ester) and heating oil are lower than those of diesel, with the exception of NOx, as long as the engine is operated appropriately (i.e., not idling excessively and not running with minimal load in a cold state). The famous "Panorama Study" did exactly that, attempting to discredit emissions from wood-burning stoves (those who have read the details of the study's sponsors know why).
Worn or carbon-fouled nozzles significantly worsen exhaust emissions (HC).
If you really want to know for sure, you can download the Swiss study (3MB): [url][/url]
All conceivable environmentally relevant factors were considered as the basis for the decisions regarding tax exemptions. Unfortunately, they didn't include the actual Pöl/Altpöl, only its methyl ester.

Best regards, Uli.http://www.news-service.admin.ch/NSBSubscriber/message/attachments/8514.pdf{MARKER}