CHARACTERISTICS OF SULFUR ABSORPTION OF HIGH-SULFUR PETROLEUM COKE
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 SO 2 emission. Burning in air, the optimum Ca/S molar ratio is 2, and the optimum temperature ranges from 850?℃ to 890?℃. Intensity of SO 2 emission is related with temperature and velocity of gas. Velocity of gas and intensity of SO 2 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.