The main components and relative contents of tars obtained in multi-stage hydropyrolysis(M-HyPy) of Xianfeng lignite were analyzed by GC-MS and compared with those in traditional single-stage hydropyrolysis (HyPy).

• 采用色 -质联用技术分析了先锋褐煤多段加氢热解过程中所得焦油的主要组分及其相对含量 ；并与单段加氢热解过程的结果进行了比较 ；从中分析了焦油轻质化的机理 .