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Effect of dissolved oxygen concentration on coke deposition of kerosene
- Pei, Xin-yan, Hou, Ling-yun
- Fuel processing technology 2016 v.142 pp. 86-91
- cooling, dissolved oxygen, heat transfer, kerosene, oxidation, temperature
- Coke deposition is an obstacle to the application of fuel cooling. The effect of dissolved oxygen concentration at the supercritical pressure on the thermal oxidative coking deposition of Chinese RP-3 kerosene was investigated using thermal fluid experiments. Tests were conducted in a small-diameter, indirectly electrically heated, single-pass straight tube covering the temperature range of the thermal oxidation reaction. The amount of coke deposition was measured by weighting. The results of the experiments for high-dissolved-oxygen, air-saturated, and deoxygenated fuels were compared at the supercritical pressure of 3MPa and a fuel outlet temperature of 410 °C. In comparison with the air-saturated fuel, the high-dissolved-oxygen fuel experienced a sharp rise in deposits, while the deoxygenated fuel had the lowest deposition quantity. The consumption fraction of the dissolved oxygen increased notably above 200 °C and fitted a pseudo-first-order reaction. The entrance effect, inducing high depositions, was interpreted by the temperature gradient and the boundary layer. Finally the relationship between thermal oxidative deposition and heat transfer was examined.