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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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钾元素对生物质主要组分热解特性的影响
, PP. 950-957
Keywords: 生物质,热解,主要组分,钾,热重-红外光谱
Abstract:
？采用热重-红外联用仪对松木及生物质主要化学组分半纤维素、纤维素、木质素的热解特性及钾元素对其热解特性的影响进行了研究.结果表明,半纤维素、纤维素、木质素发生热解的主要温度分别为200~350℃、300~365℃和200~600℃;半纤维热解产物中co、co2较多;纤维素热解产物中lg和醛酮类化合物最多;木质素热解主要形成固体产物,气体中ch4相对含量较高.三种组分共热解过程中发生相互作用使热解温度提高、固体产物增加,气体中co增加而ch4减少.添加k2co3后半纤维素和纤维素热解温度区间向低温方向移动,固体产率提高.k对纤维素作用最明显,co、co2气体与固体产物产率明显增加,醛酮类和酸类物质的产率降低;木质素受k影响相对较小,热解固体产物略有增加,挥发分中h2o和羰基物质增加;三组分共热解减弱了钾元素的催化作用.
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