[2] Wang Xiaoxiao, Wang Yingchun, Xue Yongbing[D]. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 39, 1(2017).

[3] Khanna Rita, Li Kejiang, Zhang Jianliang et al[D]. Energy & Fuels, 29, 7178(2015).

[8] Painter P C, Snyder R W, Starsinic M et al[D]. Applied Spectroscopy, 35, 475(1981).

[9] Garangelo R M, Solomon P R[D]. Fuel, 61, 663(1982).

[10] Bassilakis R, Carangelo R M, Wójtowicz M A[D]. Fuel, 80, 1765(2001).

[11] Fredericks P M[D]. Coal Science and Technology, 41, 327(1987).

[12] Ibarra J V, Moliner R, Munoz E[D]. Organic Geochemistry, 24, 725(1996).

[13] Geng W, Nakajima T, Takanashi H et al[D]. Fuel, 88, 139(2009).

[14] Chen Yanyan, Mastalerz M, Schimmelmann A[D]. International Journal of Coal Geology, 104, 22(2012).

[15] Painter P A, Sobkowiak M[D]. Energy and Fuels, 9, 359(1995).

[16] Glasser D, Glover G, Walt T J et al[D]. Fuel, 74, 1216(1995).

[17] Coin C, Kahraman H, Thomasson J et al[D]. Fuel, 79, 685(2000).

[18] Liu G, Sun R, Wu D et al[D]. Energy Fuels, 27, 23(2013).

[19] Liu G, Song H, Zhang J et al[D]. Fuel Process Technol., 156, 454(2017).

[20] Cabanzo R, Mejía-Ospino E, Orrego-Ruiz J A[D]. International Journal of Coal Geology, 85, 307(2011).

[21] Behera D, Bhattacharya S, Nandi B K[D]. International Journal of Coal Preparation and Utilization, 1(2020).

[22] Wei Hongyi, Zhao Hongru, Zhu Hongqing et al[D]. Combustion and Flame, 216, 354(2020).

[23] Jing Zhenhua, Rodrigues S, Strounina E et al[D]. International Journal of Coal Geology, 201, 1(2018).

[24] Green P D, Johnson C A, Thomas K M[D]. Fuel, 62, 1013(1983).

[25] Chem J, Koenig J L, Tuinstra F[D]. Phys., 53, 1129(1970).

[26] Carlson G L, Friedel R A[D]. Fuel, 51, 194(1971).

[27] Johnson C A, Patrick J W, Thomas K M[D]. Fuel, 65, 1284(1986).

[28] Johnson C A, Thomas K M[D]. Fuel, 66, 17(1987).

[29] Dou H, Kister J[D]. Fuel Process Technology, 12, 19(1986).

[30] Bonal L, Quirico E, Rouzaud J N et al[D]. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 61, 2368(2005).

[31] Ferrari A C, Robertson J[D]. Physical Review B, 61, 14095(2000).

[32] Dietrich D, Nestler K, Witke K et al[D]. Journal of Molecular Structure, 661-662, 357(2003).

[33] Flores D, Marques M, Suarez-Ruiz I et al[D]. International Journal of Coal Geology, 77, 377(2009).

[34] Brown M T, Hinrichs R, Vasconcellos M A Z et al[D]. International Journal of Coal Geology, 136, 52(2014).

[35] Maledi N, Potgieter-Vermaak S, Wagner N et al[D]. Journal of Raman spectroscopy, 42, 123(2009).

[36] Liu Jiawei, Xiang Jun, Xu Jun et al[C]. Proceedings of the Combustion Institute, 37, 3053(2019).

[37] Havelcová M, Machovič V, Sykorová I et al[D]. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 246, 1(2020).

[38] Hu Jianzhi, Solum M S, Taylor C M V et al[D]. Energy & Fuels, 15, 14(2001).

[39] Michael A W, Ronald J P[D]. Trends in Analytical Chemistry, 3, 144(1984).

[40] Pugmire R J, Sarofim A F, Solum M S et al[D]. Energy & Fuels, 15, 961(2001).

[41] Gordon J K, Kanmi M, Stacey M A et al[D]. Energy & Fuels, 26, 4405(2012).

[42] Mroue K H, Ramamoorthy A, Zhang R C[D]. Journal of Magnetic Resonance, 266, 59(2016).

[43] Ciavatta C, Francioso O, Montecchio D et al[D]. Bioresource Technology, 88, 189(2003).

[44] Maciel G E, Xiong Jincheng[D]. Energy & Fuels, 16, 791(2002).

[45] Dickinson W W, Suggate R P[D]. International Journal of Coal Geology, 57, 1(2004).

[46] Liu Jiaxun, Luo Lei, Ma Junfang et al[D]. Energy & Fuels, 30, 6321(2016).

[47] Liu Shimin, Sun Yingfeng, Zhao Yixin et al[D]. Fuel, 190, 359(2017).

[48] Hata Y, Okushita K, Sugimoto Y et al[D]. Energy & Fuels, 33, 1(2019).