在热解过程中生物质的4D结构变化和毛孔网络模型
Ifeoma Gloria Edeh1, Ondrej Masek2, Florian Fusseis2,3
1UK Biochar Research Centre, School of Geosciences, University of Edinburgh, Edinburgh, UK. edeh.gloria@gmail.com.
Scientific reports
|December 22, 2023
概括
生物炭是一种生物炭.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 农业科学 农业科学
背景情况:
- 了解生物炭微观结构对于其应用至关重要.
- 生物质原料和热解条件显著影响生物炭的特性.
- 之前对生物炭在热解过程中的物理结构变化的分析是有限的.
研究的目的:
- 为了可视化和量化热解过程中生物炭内部结构的变化.
- 为了研究原料类型和热解温度对生物炭多孔性的影响.
- 建立热解温度和生物炭孔隙发育之间的关系.
主要方法:
- 利用同步龙X射线微观断层扫描用于生物炭的3D成像.
- 从各种原料中提取的分析生物炭:miscanthus草,小麦草,油菜草和大米.
- 在热解过程中从50°C到800°C的50°C间隔收集了连续扫描.
主要成果:
- 生物炭孔隙度在7.41%至60.56%之间,高度依赖原料和温度.
- 孔隙性,表面积,孔隙体积和最大孔隙直径随着高达~550°C的热解温度而增加.
- 在350°C和450°C之间发生了显著的毛孔结构发展.
结论:
- 热解温度和原料类型是生物炭孔隙结构的关键决定因素.
- 优化热解条件可以为特定应用量身定制生物炭特性.
- 这项研究为推进农业和环境管理中的生物炭利用提供了关键的见解.
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