煤中有机氮热演化规律研究  

Study on Evolution Laws of Organic Nitrogen in Coal

作　　者：林中月 郑启明[2] 

机构地区：[1]神华地质勘查有限责任公司,北京100081 [2]河南工程学院资源与环境学院,河南郑州451191

出　　处：《中州煤炭》2015年第10期109-113,119,共6页Zhongzhou Coal

基　　金：山西省煤层气联合研究基金资助项目(2013012005);国家自然基金资助项目(41072119);河南省教育厅科学技术研究重点项目(13A170011)

摘　　要：氮是煤中主要的元素之一,目前研究较少。采用半微量开氏定氮法和X射线光电子能谱法对黑龙江东部地区不同煤化程度的煤中有机氮含量及类型进行研究,结果表明黑龙江东部煤中有机氮含量平均为0.44%,其中吡啶氮(N-6)占27%,吡咯氮(N-5)占49%,季氮(N-Q)占24%。随着煤化程度逐渐增高,总有机氮以及不同类型有机氮的绝对含量均具有先升高后降低的趋势,这是煤中有机氮具有一定的热稳定性所致。3种类型有机氮起始分解温度TN-5=120℃、TN-6=125℃、TN-Q=130℃,依此可以判断不同形态有机氮热稳定性程度依次为N-Q>N-6>N-5。相对含量比值PN-5/(PN-6+PN-Q)和PN-Q/(PN-5+PN-6)对煤化作用程度具有一定的指示作用。Nitrogen is a major element in coal,but relevant study is very limited. Kjeldahl method and X-ray photoelectron spectroscopy were used to determine the content of organic nitrogen and identify organic nitrogen types in coals of different coalification degrees collected from East Heilongjiang Province. Results indicate that the content of organic nitrogen of Heilongjiang coals has an average of0. 44%,which is composed of 27% pyridine（ N-6）,49% pyrrole（ N-5） and 49% quaternary（ N-Q）. The content of total organic nitrogen in coal has a first increasing and then decreasing trend with coalification,resulting from the thermal stability of organic nitrogen.The starting liberation temperatures of organic nitrogen are 120 ℃,125 ℃ and 130 ℃ for N-5,N-6 and N-Q,respectively,and this indicates that different types of organic nitrogen have different thermal stabilities and are listed in order as follows： N-Q〉 N-6 〉N-5. The ratios of PN-5/（ PN-6＋ PN-Q） and PN-Q/（ PN-5＋ PN-6） can act as an indicator of coalification.

关 键 词：黑龙江东部 煤 有机氮 煤化作用 

分 类 号：P618.11[天文地球—矿床学]