低阶煤与浒苔低温共热解过程分析及动力学.pdfVIP

学兔兔 化 工 进 展 2014年第33卷第11期 CHEMICAL INDUSTRY AND ENGINEERING PROGRESS ·2899· 低阶煤与浒苔低温共热解过程分析及动力学 王春霞，何选明，敖福禄，冯东征，曾宪灿，张杜 (湖北省煤转化与新型碳材料重点实验室，武汉科技大学化学工程与技术学院，湖北 武汉430081) 摘要：采用自行设计低温干馏装置对不同配比的低阶煤 (LRC)和浒苔 (EN)进行低温干馏实验，发现在浒苔 配入量为30％时，焦油的产率达到最大值 11．39％，比煤单独热解提高了28．61％，比理论加权值提高了8．87％。 对低阶煤、浒苔及浒苔配入量为30％的混合样进行热重分析，发现低阶煤与浒苔共热解时在240--750~C段存在 明显的协同效应，且其相对最大值达18．5％。动力学分析表明，混合热解时活化能与指前因子之间存在补偿效应， 两者混合使反应活性增大，反应速率降低，协同作用主要表现在使共热解反应活性增大。 关键词：低阶煤；浒苔；共热解；动力学；协同作用 中图分类号：TK 6；TQ 523 文献标志码：A 文章编号：1000—6613(2014)11—2899～06 DoI：10．3969~．issn．1000—6613．2014．11．013 Process analysis and kinetics during co-pyrolysis of low rank coal and enteromorpha WANG Chunxia，HEXuanming，AO Fulu，FENG Dongzheng，ZENGXiancan，ZHANG Du (Hubei Coal Conversion and New Carbon Materials Key Laboratory，Wuhan University ofScience and Technology， Wuhan 430081，Hubei，China) Abstract：The pyrolysis experiments of low rank coal(LRC)，enteromorpha(EN)and their blends were performed in a special prolysis equipment．The maximum tar yield of blends was 1 1．39％with a EN ratio of 30％，which was increased by 28．61％ compared to LRC pyrolysis alone and by 8．87％ compared to calculated value．Thermogravimetric analysis(TGA)of LRC，EN and their blends indicated significant synergistic effect in the co-pyrolysis process of LRC and EN at 240--750~C．The relative maximum value of synergistic effect was 1 8．5％．Kinetics analysis showed compensation effect between activation energy and pre—exponential factor of co-pyrolysis．Blending of LRC and EN enhanced reactivity and lowered reaction rate．Synergistic effect mainly was reflected in enhancing the