煤颗粒甲脱的表征和基于脱损害的脱模型的优化
Xiang Fu1, Xuan Liu1, Qixuan Wu1
1College of Mining, Liaoning Technical University, Fuxin 123000, China.
ACS omega
|March 4, 2024
概括
这项研究引入了一种新的仪器,用于测量非大气压下的煤甲脱附,揭示了增加的脱附时间增强了气体释放和扩散. 这些发现对于了解煤床甲开采和安全至关重要.
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:
- 大多数气体吸附研究仅限于大气压环境.
- 了解不同压力下的气体脱吸对于煤床甲的提取和安全至关重要.
- 脱吸损伤对煤炭中的气体释放特征产生重大影响.
研究的目的:
- 开发和验证一种用于在非大气压力条件下测量煤炭甲脱吸的新型仪器.
- 为了研究溶解损害对甲溶解特性的影响.
- 提出一个定量指数,用于评估煤炭在脱氧过程中的损害.
主要方法:
- 开发一种专门的煤炭甲脱吸仪器,能够调节气体压力并控制瞬间释放.
- 在不同压力下,从煤样本中测量甲脱吸量和速度,随着时间的推移 (3小时内).
- 扩散系数的计算和双参数损伤模型指数 (K) 的建议.
主要成果:
- 增加的脱吸时间导致更高的最终脱吸量和速度,样本W-01显示18.5%的增加.
- 扩散系数随着时间的推移而下降,但与脱吸次数成正比.
- 提出了一种定量损害指数 (K),样本W-01呈现最高值 (0.87),表明严重损害.
结论:
- 开发的仪器准确地测量了非大气压脱吸特性和脱吸损伤的影响.
- 溶解损伤显著影响甲释放,溶解时间和扩散系数之间存在直接关系.
- 在溶解损伤条件下验证的甲脱吸模型为评估煤样品完整性和气体含量提供了一个新的工具.
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