【摘要】 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 .结果表明 :煤的多段加氢热解过程所得油品与传统的单段加氢热解油品相比 ,含有更丰富的高经济价值组分 ,如苯、甲苯、二甲苯和酚、甲酚、二甲酚及萘 ,这主要是因为氢气在峰温处的停留促进了自由基的氢化饱和及抑制了其再聚合的反应 .通过调整反应条件 (如增加反应压力、增大氢气流量 )可使多段加氢热解过程中所得焦油进一步轻质化 .最后 ,还对合成气气氛下多段热解的油品进行了分析更多还原

【Abstract】 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).The mechanism of formation of light-end products during M-HyPy was discussed.The results indicated that higher concentration and yields of BTX,PCX and naphthalene were found in M-HyPy as compared to HyPy,which is resulted from promoting hydrogenation and inhibiting repolymerization of free radicals due to the retention of hydrogen in M-HyPy.More light oil was obtained through regulating the reaction conditions,such as increasing pressure and gas flow.The tars produced in multi-stage pyrolysis under syngas were also analyzed.更多还原