[1] [1] Xiang J H, Zeng F G, Liang H Z, et al. Journal of Fuel Chemistry and Technology, 2011, 39(7): 481.

[2] [2] Chen C G, Gu M, Xian X F. Coal Conversion, 2003, 26(4): 5.

[3] [3] Wang M J, Fu C H, Chang L P, et al. Journal of Fuel Chemistry and Technology, 2012, 40(8): 906.

[4] [4] Mathews J P, Chaffee A L. Fuel, 2012, 96: 1.

[5] [5] Jia J B, Zeng F G, Sun B L. Journal of Fuel Chemistry and Technology, 2011, 39(9): 652.

[6] [6] Li W, Zhu Y M, Chen S B, et al. Fuel, 2013, 107: 647.

[7] [7] Zheng Q R, Zeng F G, Zhang S T. Journal of China Coal Society, 2011, 36(3): 481.

[8] [8] Chen B, Wei X Y, Zong Z M, et al. Appl. Energy, 2012, 88: 4570.

[9] [9] Petersen H I, Rosenberg P, Nytoft H P. International Journal of Coal Geology, 2008, 74: 93.

[10] [10] Gezici O, Demir I, Demircan A, et al. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2012, 96: 63.

[11] [11] Castro-Marcano F, Lobodin V V, Rodgers R P, et al. Fuel, 2012, 95: 35.

[12] [12] Wang B J, Zhang Y G. Xie K C. Journal of Chemical Industry and Engineering, 2003, 54(14): 477.

[13] [13] Sun Q L, Li W, Chen H C, et al. Journal of Fuel Chemistry and Technology, 2004, 32(3): 282.

[14] [14] Mathews J P, Van Duin A C T, Chaffee A L. Fuel Processing Technology, 2011, 92: 718.

[15] [15] Boycheva S, Zgureva D, Vassilev V. Fuel, 2013, 108: 639.

[16] [16] Niekerk D V, Matews J P. Fuel Processing Technology, 2011, 92: 729.

[17] [17] Xu S C. Organic Chemistry. Beijing: Higher Education Press, 2000: 123, 253, 279, 306.