化工学报2018，Vol.69Issue(6)：2672-2680,9.DOI:10.11949/j.issn.0438-1157.20171345
温度梯度与产物流动对先锋褐煤热解产物分布的影响
Effects of temperature gradient and product flow on distribution of pyrolysis products of Xianfeng lignite
摘要
Abstract
The processes of coal pyrolysis and secondary reactions were separated by using two-stage fixed bed reactor to simulate the product flow and the interactions among reaction particles for coal pyrolysis in the traditional indirect heating reactor and indirect heating reactor with internals, and to investigate the effects of different temperature char on the distribution and quality of pyrolysis products of Xianfeng lignite. The results showed that the drastic secondary reactions occurred when tar flowed through the 500—900 ℃ char layer, the yield of pyrolysis gas increased, the tar yield and atomic H/C ratio were lower than those of blank control experiment, and the quality of oil decreased. Under the action of 100—400 ℃ char layer, the slight secondary reaction of the tar occurred, the yield of pyrolysis gas increased slightly, the tar yield had a little decrease, the atomic H/C ratio was higher than that of blank control, and the oil quality increased. The results verified the conclusion that the tar with indirect heating reactor with internals produced higher yield and better quality.关键词
煤热解/温度/半焦/二次反应Key words
coal pyrolysis/temperature/char/secondary reactions分类
化学化工引用本文复制引用
周国江,刘竹涛,战金辉,赖登国,刘晓星..温度梯度与产物流动对先锋褐煤热解产物分布的影响[J].化工学报,2018,69(6):2672-2680,9.基金项目
国家重点研发计划项目(2016YFB0600304) （2016YFB0600304）
国家自然科学基金项目(91534125).supported by National Key Research and Development Program of China (2016YFB0600304) and the National Natural Science Foundation of China (91534125). （91534125）
