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An SEM-EDX Study of Forest Residue Chars produced at High Temperatures and High Heating Rate

机译：高温和高加热速率生产的森林残留物的SEM-EDX研究

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This work investigated morphology, structure and chemical transformation of forest residue chars devolatilized in a drop tube reactor at high heating rates and high temperature conditions. Produced forest residue chars were analyzed by SEM to examine morphology and structure variations. Compared to parent forest residues, char residues obtained from devolatilization experiments have significant smaller particle sizes. At 1200 °C, the char particle underwent plastic deformation, developing a structure with smooth and compact surfaces. EDX analyses of the char surfaces revealed migration and coalescence of inorganic elements (mainly Ca, K and Si) during devolatilization processes. It was found that vaporization of calcium from char particles is more intensive at 1200 °C compared to that of 800 °C char. Meanwhile, part of calcium retained the char residues and incorporated into silicates structures.
机译：在高加热速率和高温条件下，这项工作研究了森林残留物的形态，结构和化学转化在滴管反应器中脱挥发化。通过SEM分析产生的森林残留物，以检查形态和结构变化。与父母森林残留物相比，从脱挥发化实验中获得的Char残基具有显着的粒径。在1200°C时，炭颗粒突出塑性变形，开发具有光滑且紧凑的表面的结构。 Char表面的EDX分析显示脱挥发化过程中无机元素（主要是Ca，K和Si）的迁移和聚结。发现，与800℃的炭相比，来自炭颗粒的钙从炭颗粒的蒸发更加强烈。同时，部分钙保留了炭残渣并掺入硅酸盐结构中。

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