氯化铜-四氯乙烯复合脱除煤中有机硫的研究

通过正交实验确定了用氯化铜-四氯乙烯复合脱除煤中有机硫的最佳条件,研究了脱硫条件对有机硫脱除率的影响,考察了使用复合法脱硫对煤质的影响。研究结果表明：用氯化铜-四氯乙烯复合脱除煤中有机硫效果较好,反应条件温和;最佳脱硫条件是：用四氯乙烯为有机溶剂,煤的粒度为0.076 mm,反应时间为120 min,反应温度为120 ℃,煤浆浓度为0.067 g/mL,在此条件下,脱硫率最高达43%;有机硫脱除率随着煤的粒度的减小而增大,随着反应时间、反应温度、煤浆浓度的增加先增大,达到一定程度后,其变化不再明显,甚至降低;脱硫后,煤的结构基本未发生变化,发热量损失较少。

STUDY ON ORGANIC SULFUR REMOVAL FROM COAL BY COPPER CHLORIDE OXIDATION AND TETRACHLOROETHYLENE EXTRACTION

The optimum condition was determined for organic sulfur removal from coal by copper chloride oxidation and tetrachloroethylene extration through orthogonal testing. The effect of desulfurization conditions on organic sulfur removal was studied. At the same time, the influence of this desulfurization method on the quality of coal was inquired into. The results showed that this method was good and reaction condition was very mild. And the best desulfurization condition was that PCE as organic solvent, the size of coal was 0.076 mm, the concentration of coal was 0.067 g/mL, reaction time was 120 min and reaction temperature was 120 ℃. Under this condition, the highest organic sulfur removal reached 43%. It was obvious that the organic sulfur removal increased with the decrease in size of coal and it increased at first, and then changed little, even decreased with increasing reaction time, temperature and concentration of coal. The analysis of IR spectrum showed that the structure of coal wasn't destroyed. The loss of heating value of coal was less.