炼焦煤中多环芳烃的分布特性研究

DISTRIBUTION CHARACTERISTIC OF POLYCYCLIC AROMATIC HYDROCARBONS IN COKING COAL

选取6种典型炼焦煤用二氯甲烷作萃取剂经索氏提取和K-D浓缩,采用硅胶柱层析纯化,利用高效液相色谱法(HPLC)对其中含有的16种多环芳烃(PAHs)进行测定,研究了不同煤种中PAHs的分布.结果表明,6种煤中PAHs主要以3环、4环和5环形式存在;此外还发现PAHs总量随煤化度提高而减少,随挥发分含量和氢碳摩尔比增大而增加;且PAHs含量与煤中碳含量和氧碳摩尔比也存在一定关系.

The distribution characteristics of 16 polycyclic aromatic hydrocarbons（PAHs） in 6 typical coking coals were investigated. The coal samples were extracted by the Soxhlet ex- tractor with methylene chloride, concentrated by the K-D concentrator, and purified by silica gel technique, then PAHs in the coal samples were analyzed by a high performance liquid chromato- graphic（HPLC）. Experimental results showed that most PAHs were present in the coal with 3- ring to 5-ring structure in the six coals; moreover, the higher coal rank is, the lower the total content of PAHs is. The coal with the high volatile content and H/C mole ratio contained higher PAHs. It was also discovered that there was correlation between PAHs content and carbon con- tent, O/C mole ratio in the six coals.