中国部分煤种二氯甲烷萃取液中极性和烃类有机物分布特性研究

DISTRIBUTION OF ORGANIC COMPOUNDS IN CH_2Cl_2 EXTRACTED SOLUTION OF RAW COAL

利用高分辨气相色谱 低分辨质谱联用仪 (HRGC/LRMS)检测原煤二氯甲烷萃取液中极性有机物和烃类有机物 (脂肪烃和芳香烃 )的浓度分布 ,研究了萃取液中这两类有机物和煤种、煤种成分 (固定碳、挥发分、灰分、水分 )之间的联系。研究发现萃取液中的有机物浓度和固定碳、挥发分关系密切 ;极性有机物分布较集中 ,主要为酯类和醇类 ;芳香烃以菲、二苯并蒽和苯并 北艹 为主 ,烟煤和贫煤多环芳烃含量和毒性当量 (TEQ)相对较高 ,并发现煤的碳化程度越高 ,芳香化程度越大。本文的结果为将来进一步研究燃煤过程中有机污染物形成机理提供依据。

The distribution of organic compounds in CH 2Cl 2 extraction solution of raw coal was studied with HRGC-LRMS system. The relationships among the distribution of organic compounds (including aliphatic hydrocarbon, polar compound and aromatic compound), coal types and coal ingredients were deduced. The results show that the concentration of organic compounds has great relevancy to fixed carbon, volatile component of coal. Ester and alcohol species are two main kinds of polar compounds; Phenanthrene, Dibenzanthracene and Benzoperylene are main kinds of aromatic hydrocarbon in raw coal, especially bifuminous coal and lean coal with relatively high PAHs concentration and toxicity equivalency quantity(TEQ). In addition, the concentration of PAHs increases with the ratio of hydrogen to carbon in coal.