Macromolecular Aromatic Network Characteristics of Chinese Power Coal Analyzed by Synchronous Fluorescence and X-Ray Diffraction
YE Cui-ping1,2, FENG Jie1,2*, LI Wen-ying1,2
1. Key Laboratory of Coal Science and Technology for Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China 2. Training Base of State Key Laboratory of Coal Science and Technology Jointly Constructed by Shanxi Province and Ministry of Science and Technology, Taiyuan 030024, China
Abstract：Coal structure, especially the macromolecular aromatic skeleton structure, has a strong influence on coke reactivity and coal gasification, so it is the key to grasp the macromolecular aromatic skeleton coal structure for getting the reasonable high efficiency utilization of coal. However, it is difficult to acquire their information due to the complex compositions and structure of coal. It has been found that the macromolecular aromatic network coal structure would be most isolated if small molecular of coal was first extracted. Then the macromolecular aromatic skeleton coal structure would be clearly analyzed by instruments, such as X-ray diffraction (XRD), fluorescence spectroscopy with synchronous mode (Syn-F), Gel permeation chromatography (GPC) etc. Based on the previous results, according to the stepwise fractional liquid extraction, two Chinese typical power coals, PS and HDG, were extracted by silica gel as stationary phase and acetonitrile, tetrahydrofuran (THF), pyridine and 1-methyl-2-pyrollidinone (NMP) as a solvent group for sequential elution. GPC, Syn-F and XRD were applied to investigate molecular mass distribution, condensed aromatic structure and crystal characteristics. The results showed that the size of aromatic layers (La) is small(3～3.95 nm) and the stacking heights (Lc) are 0.8～1.2 nm. The molecular mass distribution of the macromolecular aromatic network structure is between 400 and 1 130 amu, with condensed aromatic numbers of 3～7 in the structure units.
Key words：Chinese power coal;Aromatic layer;Macromolecular network characteristics;Synchronous fluorescence spectroscopy;X-ray diffraction
叶翠平1,2，冯 杰1，2*，李文英1,2 . 同步荧光和X射线衍射法分析中国动力煤大分子芳香层片结构[J]. 光谱学与光谱分析, 2012, 32(07): 1979-1983.
YE Cui-ping1,2, FENG Jie1,2*, LI Wen-ying1,2 . Macromolecular Aromatic Network Characteristics of Chinese Power Coal Analyzed by Synchronous Fluorescence and X-Ray Diffraction . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(07): 1979-1983.
[1] Lu L, Sahajwalla V, Kong C, et al. Carbon, 2001, 39(12): 1821. [2] Erdenetsogt Bat-Orshikh, Lee Insung, Lee Sung Keun, et al. International Journal of Coal Geology, 2010, 82: 37. [3] Sun X G. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2005, 62(1-3): 557. [4] Li X, Cao D, Liu D. Mining Science and Technology (China), 2010, 20(6): 835. [5] Sonibare O O, Haeger T, Foley S F. Energy, 2010, 35(12): 5347. [6] XIE Ke-chang(谢克昌). Coal Structure and Its Reactivity(煤的结构与反应性). Beijing: Science Press(北京: 科学出版社), 2002. [7] YE Cui-ping，FENG Jie，LI Wen-ying，et al(叶翠平，冯 杰，李文英，等). Chinese J. Anal. Chem.(分析化学), 2004, 32(5): 622. [8] ZHANG Zhi-hong，YE Cui-ping，FENG Jie，et al(张志红，叶翠平，冯 杰，等). Chinese J. Anal. Chem.(分析化学), 2006, 34(2): 209. [9] LI Wen-ying，YE Cui-ping，FENG Jie，et al(李文英，叶翠平，冯 杰，等). Chinese J. Anal. Chem.(分析化学), 2006, 34(7): 905. [10] LI Yong-zhi，DENG Xian-liang，YU Wei-le(李勇志，邓先梁，俞帷乐). Journal of Fuel Chemistry and Technology(燃料化学学报), 1998, 26(3): 280. [11] Islas C A, Suelves I, Li W, et al. Fuel, 2003, 82(14): 1813. [12] ZHANG Xiao-dong，QIN Yong，SANG Shu-xun (张小东，秦 勇，桑树勋). Journal of China University of Mining＆Technology(中国矿业大学学报), 2007, 36(5): 647. [13] LUO Yun-fei，LI Wen-hua(罗陨飞，李文华). Journal of China Coal Society (煤炭学报), 2004, 29(3): 338. [14] CHEN Guo-zhen，HUANG Xian-zhi，ZHENG Zhu-zi，et al(陈国珍，黄贤智，郑朱梓，等). Fuorescence Analysis, 2nd ed.(荧光分析法, 第2版). Beijing: Science Press(北京: 科学出版社). 1990. 39. [15] WANG Zi-jun，LIANG Wen-jie，QUE Guo-he，et al (王子军，梁文杰，阙国和，等), Acta Petrolei Sinica·Petroleum Processing Section(石油学报·石油加工)，1999，15(4): 67. [16] Yang X P, Shi B F, Zhang Y H, et al. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2008，69(2): 400.
