|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Stored Renewable Energy in Coal
||Extraction and Thermal Dissolution of Low-rank Coal by N-methyl-2-pyrrolidinone
||Jun Zhao, Haibin Zuo, Siyang Long, Jingsong Wang, Qingguo Xue
|On-Site Speaker (Planned)
Abstract: In order to effective use of low rank coal, the thermal dissolution coal (TDC) was extracted from four kinds of low-rank coals by N-2-methyl-2-purrolidinone(NMP) at high temperature and high pressure. The structures of thermal dissolution coal and residues were characterized by element analysis, FT-IR spectra. The effects of temperatures, coal rank, solid-liquid ratio and extraction time on the extraction yields of TDC were studied, respectively. Moreover, the extraction mechanism of TDC at mild conditions is proposed. The result shows that the ash contents of TDCs from four raw coals are significantly lower than that of raw coals, and the volatile contents and H/C are significantly improved. For KL coal, with the increase of temperature, the extraction yield of KL-TDC is improved evidently to 56.25％ and the ash content is decreased to 0.49％at 350 ℃.