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PPO mix met ethyl-alcohol

edited November 2005 in Olieen
Iemand al geprobeerd PPO te mengen met alcohol?

PPO zou dezelfde eigenschappen hebben als diesel wanneer er 9% ethyl-alcohol (95°) in vermengd is, bij een temperatuur van 80° C.

Zonder alcohol zou een temperatuur van 150° C nodig zijn om dezelfde verbranding te krijgen als diesel.

Ombouw met warmtewisselaar zou dus nog steeds nodig zijn...

Verder iemand ervaring met Aceton als additief bij PPO?


  • edited November 2005

    Experiments were carried out in order to compare the atomisation quality of rapeseed oil and rapeseed oil/alcohol with that of a conventional fossil fuel such as diesel oil and to compare performances in terms of soot formation and burnout along the flames for all fuels. First of all the stability of the rapeseed oil with the temperature was checked by thermogravimetry analysis and it comes out that this oil is very stable up to 300°C in inert conditions and up to 200°C under an oxidative atmosphere. Due to this stability with the temperature it is possible to preheat the oil up to 150°C where it attains the same viscosity as the diesel oil. Atomisation tests showed that at 150°C the performance of the rapeseed oil are comparable with that of the diesel oil.

    The overall combustion performance of the rapeseed oil are very satisfactory in comparison with the diesel fuel while the rapeseed oil produces almost 40 % less soot than diesel fuel. The different volatility of this fuel respect to the diesel fuel is responsible of the different behaviour of the sampled gas concentrations in the base of the flames while at the end of the flames, both attain almost the same values. It has been established that an addition of 9 % of ethyl alcohol (95 %) bring a great benefit regarding the pre-heating oil temperature. In fact, the presence of alcohol allows a reduction in the inlet oil temperature from 150 °C to 80 °C. Moreover, the combustion of the emulsion produces less soot and, at the exhaust, the amount is almost one half less than that produced by the combustion of rapeseed oil. It should be interesting to investigate more carefully the morphology of the rapeseed oil soot because of its higher reactivity toward oxidation shown by using TG analysis that can be correlated to higher hydrogen content.
  • browniebrownie Livin' and Breathin' PPO
    edited November 2005
    wannes said:

    Verder iemand ervaring met Aceton als additief bij PPO?
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