Abstract

Gas oils with different wax contents were tested via a developed differential thermal analysis (DTA) procedure and also according to standard test methods. From the DTA curves, the following parameters were measured: onset peak temperature, maximum peak temperature and peak area. The variations of these DTA parameters with the standard properties for the gas oils, e.g. cloud, pour and cold filter plugging points and wax contents, were examined and were found to give linear relationships. Correlation coefficients between these results were calculated according to the established equations, which were also used for prediction of the standard properties for other gas oil samples from their DTA curves. The precision limits for the developed DTA procedure were found to be satisfactory.

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