Nitrogen in Chinese coals  

作　　者：Finkelman R.B. 

机构地区：[1]U.S.Geological Survey,Mail Stop 956,VA 20192,USA

出　　处：《Chinese Journal Of Geochemistry》2011年第2期248-254,共7页中国地球化学学报

基　　金：supported by the National Natural Science Foundation of China (Grant No. 40133010)

摘　　要：Three hundred and six coal samples were taken from main coal mines of twenty-six provinces,autonomous regions,and municipalities in China,according to the resource distribution and coal-forming periods as well as the coal ranks and coal yields.Nitrogen was determined by using the Kjeldahl method at U.S.Geological Survey(USGS),which exhibit a normal frequency distribution.The nitrogen contents of over 90% Chinese coal vary from 0.52% to 1.41% and the average nitrogen content is recommended to be 0.98%.Nitrogen in coal exists primarily in organic form.There is a slight positive relationship between nitrogen content and coal ranking.Three hundred and six coal samples were taken from main coal mines of twenty-six provinces,autonomous regions,and municipalities in China,according to the resource distribution and coal-forming periods as well as the coal ranks and coal yields.Nitrogen was determined by using the Kjeldahl method at U.S.Geological Survey(USGS),which exhibit a normal frequency distribution.The nitrogen contents of over 90% Chinese coal vary from 0.52% to 1.41% and the average nitrogen content is recommended to be 0.98%.Nitrogen in coal exists primarily in organic form.There is a slight positive relationship between nitrogen content and coal ranking.

关 键 词：COAL NITROGEN DISTRIBUTION 

分 类 号：X703[环境科学与工程—环境工程]