煤炭颗粒中由密度梯度驱动的气体吸附和扩散的非维度分析和应用
Hao Xu1,2, Gang Wang3,4, Qiming Huang3
1College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, People's Republic of China. skdxh0904@sdust.edu.cn.
Environmental science and pollution research international
|November 14, 2023
概括
开发了煤炭颗粒中气体扩散的新模型,改善了煤床甲生产和矿山安全. 这种模型准确地预测了气体吸附和扩散,提高了系数计算.
科学领域:
- 地质科学 地质科学
- 化学工程是化学工程的重要组成部分.
- 材料科学 材料科学 材料科学
背景情况:
- 了解煤炭中的气体扩散对于煤床甲 (CBM) 生产和矿山安全至关重要.
- 现有的气体扩散模型和确定扩散系数的方法需要提高准确性和清晰度.
研究的目的:
- 建立一个新的气体吸附和扩散模型在由自由气体密度梯度 (FGDG) 驱动的煤炭颗粒中.
- 用有限差异方法 (FDM) 和无维分析来数量解决模型.
- 为了研究关键参数的变化规则,如无维气体压力,含量和脱吸率.
主要方法:
- 开发一个自由气体密度梯度 (FGDG) 驱动的煤颗粒气体吸附和扩散模型.
- 使用有限差异方法 (FDM) 和无维方法的数值解决方案.
- 对无维气体压力,气体含量,脱吸能力和脱吸率的变化规则的分析.
主要成果:
- 无维方法简化了处理过程,并揭示了常见的脱吸/扩散现象.
- 气体吸附和扩散从煤颗粒表面向内发生,表现为歇斯底里.
- 无维半径或时间的增加导致无维气体的压力,含量和脱吸率的降低.
- 无维度的累积气体脱吸起初迅速升高,然后在无维度时间的高原上.
结论:
- FGDG扩散模型准确地预测实验数据,验证其合理性.
- 这种无维度方法可方便精确的扩散系数反转和参数分析.
- 这项研究提供了关于模拟煤炭颗粒气体脱吸和扩散行为的见解.
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