(1) Evaluation of thermal stability in the aspect of material
The coking degree of marine fuel oil was evaluated from the aspect of the material. Metallic pieces formed of iron, copper and aluminum were immersed in marine fuel oil, heated (at 130℃) and left. Then, they were evaluated by the scanning electronic microscope (SEM) and the X-ray micro analyzer (EPMA) to find that the coking ease is in the order of iron＞＞copper＞aluminum (Photo 1).
5. Conclusion
The combustibility and product stability of marine fuel oil are reported including the latest examples. Though the combustibility and stability are quality items difficult to numerically express, interesting data can be obtained if the analysis by equipment or the like is best utilized. In future, the grasping of the relationship such as that between the fuel composition and the property of the exhaust gas will be challenged. It is an important role for a petroleum supplier to give an appropriate advice on various problems in marine fuel oil, and the data of this kind will also be collected in future. The comments and requests of those concerned will be greatly appreciated.
References:
(1) Hatori, “The 63th Report of Ship Research Institute Ministry of Transport.” (1994. 6), pp99-102.
(2) “Controlling Compatibility of Residual Fuel Oil M. G. Griffth and C. W. Siegmund, Exxon's Paper
(3) J. H. Hildebrand, J. M. Prausnitts, R. L. Scott, “Regular and Related Solutions”
(4) J. J. Heithaus JIP, 48(458), 45(1962)
(5) Nomura, Seizan-do's “Hakuyonenryo-no-Kagaku” p118.
