用高温水解-离子色谱法研究贵州煤中氟质量分数

Research on fluorine concentration in coals from Guizhou province by pyrohydrolytic-ion chromatograpy

应用高温水解-离子色谱方法对贵州省11个煤样中的氟质量分数进行了测定;与目前被广泛使用的高温水解-氟离子选择电极法进行了对比;并根据氟与灰分、砷、汞和氯元素质量分数的相关性,探讨了氟在煤中的赋存形态.结果显示贵州省特别是贵州西南部煤中氟的质量分数普遍高于我国其他地区煤中氟质量分数的平均值,属高氟煤区;高温水解-离子色谱法具有方便、快速、结果准确、实用性强的特点,是测量煤中氟质量分数的一种有效方法;贵州煤中的氟质量分数与灰分无明显相关关系,可以认为贵州煤中的氟并不是以无机形态赋存为主;贵州煤中的氟质量分数与氯、砷、汞质量分数之间也无明显的相关关系.

The concentration of 11 coal samples from Guizhou province were determined by pyrohydrolytic-ion chromatograpy. Pyrohydrolytic-ion chromatograpy method was compared with fluorine ion selective electrode method. The correlation of fluorine with ash, arsenic, and mercury and chlorine concentration and their probable mode of occurrence in coals from Guizhou province was quantitatively analyzed and discussed respectively. The results show that. the fluorine concentration in the coals is very high, especially southwest of this province, which are generally higher than the average of fluorine concentration in Chinese coals; the pyrohydrolytic-ion chromatograpy method is simple, rapid, accurate and applicable to determining fluorine in the coals; the fluorine concentration is independent of the ash content, and the inorganic species is not the primary form of fluorine existence in the coals~ there is no the correlation of the fluorine with arsenic, mercury and chlorine concentration.