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5. 老化作用对生物炭理化特性的影响

老化作用对生物炭理化特性的影响

来源 :工程热物理学报 | 被引量 : 0次 | 上传用户：impeipeiyang

【摘 要】

：

以松木屑、玉米秸秆、小麦秸秆和花生壳四种生物质热解制备的生物炭为对象,分别采用自然老化、高温老化、冻融老化对四种生物炭进行5个月老化培养.结合元素分析、扫描电镜分析(SEM)、N2吸附/脱附分析、X射线衍射分析(XRD)、傅里叶红外光谱分析(FTIR)和pH测定等表征分析,研究了老化方式对生物炭理化特性的影响.结果表明,老化过程能够显著提高生物炭的BET比表面积,改善生物炭的微观孔隙结构,降低C元素含量,增加O元素含量,提高H/C、O/C和(O+N)/C以及表面含氧官能团数量,并降低生物炭的pH值,老化方

【作 者】

：

刘文慧 王昱璇 陈丹丹 卢平 

【机 构】

：

南京师范大学能源与机械工程学院,南京210023

【出 处】

：

工程热物理学报

【发表日期】

：

2021年6期

【关键词】

：

生物炭 老化作用 理化特性 土壤修复 

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论文部分内容阅读

以松木屑、玉米秸秆、小麦秸秆和花生壳四种生物质热解制备的生物炭为对象,分别采用自然老化、高温老化、冻融老化对四种生物炭进行5个月老化培养.结合元素分析、扫描电镜分析(SEM)、N2吸附/脱附分析、X射线衍射分析(XRD)、傅里叶红外光谱分析(FTIR)和pH测定等表征分析,研究了老化方式对生物炭理化特性的影响.结果表明,老化过程能够显著提高生物炭的BET比表面积,改善生物炭的微观孔隙结构,降低C元素含量,增加O元素含量,提高H/C、O/C和(O+N)/C以及表面含氧官能团数量,并降低生物炭的pH值,老化方式对生物炭理化特性改善效果顺序为高温老化?冻融老化?自然老化.

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