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Significantly enhances caking index of long‐flame coal under tetralin‐glycerol/H 2 system
Author(s) -
Liu Shoujun,
Wang Zhao,
Yang Song,
Chang Zhiwei,
Zhang Kaixia
Publication year - 2019
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.2353
Subject(s) - tetralin , caking , coal , chemistry , solvent , anthracene , plasticizer , glycerol , chemical engineering , bituminous coal , organic chemistry , engineering
For alleviating of the shortage of coking coal resource and efficient cleaning and utilization of low‐rank coal, hydro‐plasticization of low‐rank coal was carried out. However, the caking property of low‐rank coal cannot be obviously improved under mild conditions in the traditional tetralin‐H 2 system. This study is to investigate the feasibility of mixed tetralin‐glycerol as a solvent in the process of low‐rank coal hydro‐plasticization. The solvent ratios of tetralin‐glycerol, reaction pressure, and atmosphere were varied to evaluate their effects on hydro‐plasticization. The results show that the caking index (G RI ) of long‐flame coal increases from 0 to 78 at mild conditions, and the hydrogen transfer mechanism might be directly from H 2 to coal rather than through hydrogen‐donor solvents in the mixed solvent case. The solvent extraction and the G RI of modified coals were measured and found that the G RI of modified coal has a good linear relationship with PAA yield, and its R 2 is .985.