对预处理草的吸水扩散模型和动力学进行研究
Lei Song1,2, Yuanna Li1,2, Tingzhou Lei1,2
1Institute of Urban and Rural Mining, Changzhou University, Changzhou, 213164, China.
Scientific reports
|March 23, 2025
概括
热预处理显著降低了草的高度,增加了水性. 这项研究模拟了玉米,大米和小麦中的水分吸附,有助于它们的可持续利用.
科学领域:
- 农业科学 农业科学
- 材料科学 材料科学 材料科学
- 生物质能源 生物质能源
背景情况:
- 生物质,特别是农业残留物,如玉米,大米和小麦,是可持续的资源.
- 了解水分吸收对于优化草生物质的储存,加工和利用至关重要.
- 热预处理是修改生物质特性的一个关键方法,但它对草吸水效应的影响需要详细研究.
研究的目的:
- 研究热预处理 (120200°C) 对玉米,大米和小麦的吸水特性的影响.
- 开发和应用一个内部粒子扩散模型来阐明水分吸附机制.
- 建立热预处理温度,疏水性和吸水动力学之间的关系.
主要方法:
- 样 (玉米,大米,小麦) 在120至200°C的温度下进行热预处理.
- 测量了水分吸附异温,并使用内部粒子扩散模型来分析吸附动力学.
- 进行了水接触角度测量,以量化疏水性变化.
主要成果:
- 热预处理显著降低了湿度,玉米在200°C时显示了最大的降低 (58.45%),其次是大米 (28.32%) 和小麦 (12.12%).
- 疏水性随着预处理温度的上升而显著增加.
- 三级内部粒子扩散方程准确地描述了水分吸附过程,扩散速率常数下降,边界层厚度在70%的湿度下增加.
结论:
- 热预处理有效地降低了玉米,大米和小麦的吸水能力,提高了它们的疏水性.
- 开发的扩散模型为了解草-水分相互作用提供了一个强大的框架.
- 特定方程 (玉米的ASABE,大米和小麦的Peleg) 准确预测水分含量,为大规模,高质量的草利用铺平了道路.
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