Synfuel stability

In some applications, thermal degradation can be more of a concern than storage stability. Table 6 presents data on several middle distillate synfuels as compared to a petroleum-based fuel. The tube deposits from the Jet Fuel Thermal Oxidation Test (ASTM D3241) are significantly higher for the synfuels, but the pressure buildup is normal except for one case. This indicates either rapid reactions at the hot surface or slow agglomeration. In either case, the deposit level is of concern and may dictate further upgrading. 

All information published to date implies that the production of stable synfuels is possible but will require refining processes altered from those now required for petroleum. Stability research is currently focussing on both basic and applied considerations, and the results are encouraging. By continuing these efforts, it is hoped that stability will not be the limiting factor in providing adequate future fuel supplies. 

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