煤炭转化2025，Vol.48Issue(3)：30-37,8.DOI:10.19726/j.cnki.ebcc.202503004
不同馏分段溶剂对神东补连塔煤直接液化性能的影响
Effect of different distillation fraction solvents on direct liquefaction performance of Shendong Bulianta coal
赵润泽 1谢晶 1蔺聪福 1单贤根 1王洪学 1高山松 1段晓军1
作者信息
- 1. 煤炭直接液化国家工程研究中心,201108 上海||国能基石化工科技(上海)有限公司,201108 上海
- 折叠
摘要
Abstract
In order to investigate the role of different narrow fractions of circulating solvents in the process of direct coal liquefaction,explore the key components to alleviate the pressure of lique-faction reaction,and guide the preparation of high-performance solvents via the optimization of solvent components,the properties and composition of the narrow fractions of medium temperature solvent(distillation range temperature is 210℃-350℃)and the high temperature solvent(distillation range temperature is>350℃)obtained from the 0.18 t/d coal direct liquefaction continuous unit using Shendong Bulianta coal were analyzed.The effect of narrow fractions on the viscosity of oil-coal slurry and liquefaction performance of Shendong Bulianta coal under mild conditions(6.0 MPa)and severe conditions(10.0 MPa)were discussed.The results show that as the distillation range tempera-ture of the narrow fractions increases,the solvent density increases and the n(H)/n(C)gradually decreases.Adding different narrow fractions of medium temperature solvents to the coal-oil slurry can reduce its viscosity,however,adding high-temperature solvents increases the viscosity.The liquefac-tion performance of Shendong Bulianta coal is associated with the solvent composition of different narrow fractions.Within the distillation range temperature of 210℃-270℃,the main components of the narrow fractions are cycloalkanes and monocyclic aromatic hydrocarbons,and the liquefaction con-version and oil yield of Shendong Bulianta coal are relatively low.As the distillation range tempera-ture further increases to above 270℃,the content of bicyclic aromatic hydrocarbons gradually increases,and the liquefaction conversion and oil yield significantly increase.In addition,as the initial hydrogen pressure decreases from 10.0 MPa to 6.0 MPa,the initial temperature of the distillation fractions that promote the coal liquefaction performance increases from 250℃to 270℃,indicating that relatively high-temperature distillation fractions in medium temperature solvent are conducive to the alleviation of liquefaction reaction conditions.关键词
中温溶剂/窄馏分/降黏作用/液化性能/供氢溶剂制备Key words
medium temperature solvent/narrow fraction/viscosity reduction effect/lique-faction performance/preparation of hydrogen donor solvent分类
化学化工引用本文复制引用
赵润泽,谢晶,蔺聪福,单贤根,王洪学,高山松,段晓军..不同馏分段溶剂对神东补连塔煤直接液化性能的影响[J].煤炭转化,2025,48(3):30-37,8.
