Abstract: By using chemical desulfurizer A to desulfurize Jinling high sulfur petroleum coke, the effects of reaction temperature, reaction time and agent coke ratio on the desulfurization effect of high sulfur petroleum coke are investigated respectively. High sulfur pet coke with sulfur content of 8.72% can be reduced to less than 3% or even lower by varying desulfurization process. Further investigate the effect of low agent coke ratio on desulfurization effect. When the experimental conditions are: reaction temperature is 900 ℃, reaction time is 20 min and agent coke ratio is 0.5, the sulfur content in petroleum coke can be reduced to 2.38%. After desulfurization, the specific surface area of petroleum coke is 295.45 m²/g and pore volume is 0.15 cm³/g, and the pore structure is not particularly developed. After desulfurization, the metal content of petroleum coke decreases to a certain extent, and the removal rates of calcium, iron, nickel, vanadium and sodium are 70.15%, 77.12%, 15.20%, 57.64% and 47.65% respectively, which will significantly improve the air and carbon dioxide reactivity of petroleum coke as prebaked anode, and then significantly reduce the carbon dioxide emission of electrolytic aluminum industry. The solid product generated after the reaction between desulfurizer A and petroleum coke contains desulfurized petroleum coke and some salts generated during the reaction.

Key words: high sulfur petroleum coke, desulfurization, prebaked anodes, metal content

摘要： 使用化学脱硫剂A对金陵高硫石油焦进行脱硫，分别考察反应温度、反应时间及剂焦比对高硫石油焦脱硫效果的影响。通过脱硫工艺的调整，可以将高硫石油焦中总硫质量分数从8.72%降至3%以下，甚至更低。进一步考察低剂焦比对脱硫效果的影响，当实验条件为反应温度900 ℃、反应时间20 min及剂焦比0.5时，可将石油焦中硫质量分数降至2.38%，脱硫后石油焦的比表面积为295.45 m²/g、孔体积为0.15 cm³/g，孔隙结构不是特别发达。脱硫后石油焦的金属含量呈一定程度下降，Ca,Fe,Ni,V,Na的脱除率分别为70.15%，77.12%，15.20%，57.64%及47.65%，明显改善石油焦作为预焙阳极的空气及二氧化碳反应性，进而明显降低电解铝行业的二氧化碳排放量。脱硫剂A与石油焦反应后生成的固相产物中包含脱硫石油焦及反应过程中生成的一些盐类。

关键词: 高硫石油焦, 脱硫, 预焙阳极, 金属含量