8th International Congress on Science and Technology of Ironmaking - ICSTI 2018

Abstract: In order to effectively use of low rank coal and biomass, the co-liquefied product was extracted from two kinds of low-rank coals and biomass by N-2-methyl-2-purrolidinone(NMP) at high temperature and high pressure. The structures of the co-liquefied product 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 co-liquefied product were studied, respectively. Moreover, the extraction mechanism of the co-liquefied product at mild conditions is proposed. The results show that the ash contents of the co-liquefied product from two raw coals and biomass are significantly lower than that of raw coals, and the volatile contents and H/C are significantly improved. For GD coal, with the increase of temperature, the extraction yield of GD is improved evidently from 20％ to 51.25％ and the ash content is decreased from 0.68％ to 0.33％at 360 ℃.