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操作参数对生物质热解液化及焦炭特征的影响

, PP. 29-33

Keywords: 生物质,热解,操作参数,焦炭

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Abstract:

以稻壳为研究对象,在固定床中热解制取液体生物油.实验研究了热解温度、氮气流速和升温速率对热解3种产物分布的影响.在25℃/min的升温速率达到热解终温550℃,氮气流速为150mL/min工况下液体产率达到最大值49.91%.随着升温速率的增加液体产率升高,焦炭的产率降低.利用热重分析考察了原料的热分解特性.通过X射线衍射方法和SEM对热解焦炭的晶相和形态进行分析.研究表明热解温度对焦炭的晶相和表面形态的影响很大,在550℃的热解温度下得到的焦炭有较突出孔状结构.

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