Study of Biochar Properties by Scanning Electron Microscope - Energy Dispersive X-Ray Spectroscopy (SEM-EDX)
文献类型： 外文期刊
作者： Ma, Xingzhu 1 ; Zhou, Baoku 1 ; Budai, Alice 2 ; Jeng, Alhaji 2 ; Hao, Xiaoyu 1 ; Wei, Dan 1 ; Zhang, Yulan 3 ; Rasse, Da 1 ;
作者机构： 1.Heilongjiang Acad Agr Sci, Inst Soil Fertilizer & Environm Resource, Harbin, Peoples R China
2.Norwegian Inst Bioecon Res NIBIO, As, Norway
3.Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China
关键词： Biochar;SEM-EDX;morphological analysis;O/C ratio;carbon content
期刊名称：COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS （ 影响因子：1.327； 五年影响因子：1.315 ）
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收录情况： SCI
摘要： Biochar is a carbon-rich solid product obtained by pyrolysis of biomass. Here, we investigated multiple biochars produced under slow pyrolysis (235-800 degrees C), flash carbonization, and hydrothermal carbonization (HTC), using Scanning Electron Microscope-Energy Dispersive X-ray Spectroscopy (SEM-EDX) in order to determine whether SEM-EDX can be used as a proxy to characterize biochars effectively. Morphological analysis showed that feedstock has an integrated structure compared to biochar; more pores were generated, and the size became smaller when the temperature increased. Maximum carbon content (max. C) and average carbon content (avg. C) obtained from SEM-EDX exhibited a positive relationship with pyrolysis temperature, with max. C correlating most closely with dry combustion total carbon content. The SEM-EDX O/C ratios displayed a consistent response with the highest treatment temperature (HTT). The study suggests that SEM-EDX produces highly consistent C, oxygen (O), and C/O ratios that deserve further investigation as an operational tool for characterization of biochar products.
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