WU Daishe1*, LEI Jie1, ZHENG Baoshan2, TANG Xiuyi3, WANG Mingshi2, HU Jun2, LI Shehong2, WANG Binbin2, and Finkelman R.B.4
(1. Key Lab. of Poyang Lake Ecology and Bio-resource Utilization, Ministry of Education, College of Environmental Science and Engineering;
2.Nanchang University, Nanchang 330029, China;
3. Institute of Geochemistry, CAS, Guiyang 550002, China;
4. Anhui University of Science and Technology, Huainan 232001, China;
5. U.S. Geological Survey, Mail Stop 956, VA 20192, USA)
Abstract 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.
Key words coal; nitrogen; distribution
* Corresponding author, E-mail: dswu@ncu.edu.cn
CHINESE JOURNAL OF GEOCHEMISTRY Vol. 30, No. 2, 2011, page 248-254
© Science Press and Institute of Geochemistry, CAS and Springer-Verlag Berlin Heidelberg 2011
