Semi-volatile and volatile compounds formed by degradation of triglycerides in a pressurized reactor
Knothe, G. | Bagby, M.O. | Ryan, T.W. III. | Wheeler, H.G. | Callahan, T.J.
The products formed during precombustion reactions of several saturated and unsaturated triglycerides upon their injection into a reactor, simulating conditions that exist in a diesel engine, were collected. Two traps were employed in order to distinguish between volatile and semi-volatile components. The resulting samples were analyzed with gas chromatography-mass spectrometry techniques. Various aliphatic and aromatic hydrocarbons were detected as major degradation products. Oxygenated degradation products were found in smaller numbers. Differences observed in the samples compared to previous work are attributed to the higher temperature used in the present study (450°C vs. 400°C). The environment (air or nitrogen) had considerable influence on product formation. The number of components was less for samples of tripalmitin, tristearin and triolein reacted under nitrogen than under air; but more components were formed from trilinolein and trilinolenin under nitrogen atmosphere than under air.
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