关键词:

高硫石油焦, 固硫率, 燃烧

Abstract: The characteristics of desulfuration of high-sulfur petroleum coke are investigated with a pulse-differential fix bed reactor. The combustion tests are carried out with one representative coke with particle size of 60—70 μm between 830 ℃ and 950 ℃. In the experiment, sulfur is captured by calcium oxide addition, and then yields stable calcium sulfide. Through the tests, five important factors affecting desulfuration are found: temperature, Ca/S molar ratio, oxygen pressure, velocity of gas and intensity of SO₂ emission. Burning in air, the optimum Ca/S molar ratio is 2, and the optimum temperature ranges from 850 ℃ to 890 ℃. Intensity of SO₂ emission is related with temperature and velocity of gas. Velocity of gas and intensity of SO₂ emission have negative effect to desulfuration. Another important finding from the results on high-sulpher petroleum coke is that under the most optimum conditions, the desulfuration ratio in air is higher than that in pure oxygen.

Key words:

高硫石油焦, 固硫率, 燃烧