engleski

Fuel biolubricants based on neopentyl glycol, trimethylpropane, and pentaerythritol

The rising environmental concerns have led researchers to a greener approach regarding the synthesis of fuel additives. In addition, due to necessary desulphurization of diesel fuel, which decreases its lubricity, nowadays researchers are aiming towards the development of bioadditives that could improve this application property. Here, bioadditives were synthesized using lauric acid alongside one of the branched alcohols (neopentyl glycol, trimethylolpropane, and pentaerythritol). Furthermore, their influence on the lubricity of diesel fuel was tested. Lauric acid is a saturated acid containing twelve carbon atoms derived from a renewable source, such as coconut oil and palm oil. On the other hand, neopentyl glycol, trimethylolpropane, and pentaerythritol are types of polyols, alcohols containing more than one hydroxyl group, obtained by aldol reaction from formaldehyde, a product of a cell metabolism, and 2-methylpropanale, n- butanal and acetaldehyde, respectively. Preliminary experiments resulted in the improvement of the fuel lubricity by 40 %, since the wear scar diameter was reduced from 571 μm for mineral diesel to 360 μm, after the addition of a bioadditive. The influence of these bioadditives on pour points of mineral diesel and biodiesels was also investigated, however the fuel pour points were not improved.

bioadditives ; lubricity ; diesel fuel

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