高硫石油焦燃烧固硫特性

CHARACTERISTICS OF SULFUR ABSORPTION OF HIGH-SULFUR PETROLEUM COKE

以固定床微分反应器脉冲进气的方法对高硫石油焦的燃烧固硫特性进行了研究 .实验中以CaO为固硫剂 ,高硫焦在高温下燃烧释放的SO2 与其反应生成稳定的CaSO4.通过对实验结果进行分析 ,确定了

The characteristics of desulfuration of high-sulfur petroleum coke are investigated with a pulse-differential fixed bed reactor. The combustion tests are carried out with one representative coke with particle size of 60-70 μm between 830°C and 950°C. 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°C to 890°C. Intensity of SO2 emission is related with temperature and velocity of gas. Velocity of gas and intensity of SO2 emission have negative effect to the desulfuration. Another important finding from the results on high-sulfur petroleum coke is that under the most optimum conditions, the desulfuration ratio in air is higher than that in pure oxygen.