Citation: PAN Chun-xiu, LIU Hua-long, ZHU Wan-wan, LI Hai-ping, LIU Jin-run, WEI Xian-yong, SHUI Heng-fu, WANG Zhi-cai. Characterization of the thermal dissolution products of a subbituminous coal at different temperatures[J]. Journal of Fuel Chemistry and Technology, ;2015, 43(4): 416-421. shu

Characterization of the thermal dissolution products of a subbituminous coal at different temperatures

1.
1. School of Chemistry & Chemical Engineering, Anhui University of Technology, Anhui Key Laboratory of Clean Coal Conversion & Utilization, Ma'anshan 243002, China;

Corresponding author: SHUI Heng-fu,
Received Date: 14 October 2014

Fund Project: 国家重点基础研究发展规划(973计划,2011CB201302) (973计划,2011CB201302)国家自然科学基金(U1261208,21476003,21306001,21176001,51174254) (U1261208,21476003,21306001,21176001,51174254)科技部中日战略合作专项(2013DFG60060) (2013DFG60060)安徽省SRTP项目(201410360160)。 (201410360160)

The thermal extracts and residues of Shenfu subbituminous coal (SC) obtained from thermal dissolution in 1-methylnaphthalene (1-MN) at different temperatures were characterized by FT-IR, thermo-gravimetric (TG) analysis, GPC and synchronous fluorescence spectrometry. The results show that the thermal extracts contain more amounts of aliphatic compounds than residues. Almost all of the ash is transferred into the residue. TG analysis shows that there exists a significant difference between SC and its residues. With the thermal dissolution temperature increasing from 300 to 360 ℃, the number-average molecular weight of thermal extract increases; however, it decreases at 380 ℃. The condensed aromatic ring number of thermal extract increases with the thermal dissolution temperature rising. When the thermal dissolution of SC was carried out at temperature below initial pyrolysis temperature of SC, the thermal dissolution is dominated by the solvation of 1-MN with coal to break the non-covalent bonds in SC. The light components such as ketone and ester are easy to be released at this temperature. For thermal dissolution carried out above the initial pyrolysis temperature of SC, the pyrolysis of side chains and bridged bonds in SC and condensation reactions of free radicals take place, resulting in an increase of three-fused ring structure in thermal extract.
- subbituminous coal,
- thermal dissolution,
- characterization
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沈阳化工大学材料科学与工程学院沈阳 110142