热力学分析的热力学分析
Fu Yang1,2, Kun Gao3, Zunyi Yu3
1Shaanxi Provincial Coal Geology Group Co. Ltd., Xi'an, Shaanxi 710054, P. R. China.
ACS omega
|June 5, 2023
概括
富含焦油煤的in situ地下热解对于能源需求至关重要. 较高的压力增加了初始反应温度,允许在这个复杂的过程中控制产品产量.
科学领域:
- * 地质化学和化学工程
- * 热力学和能源资源
背景情况:
- * 富含焦油煤的现场地下热解对于中国的能源安全和可持续的煤炭利用至关重要.
- *实际的地下条件 (高压) 与实验室模拟有很大差异,需要进行特定的热力学研究.
- *了解这些条件是优化煤炭资源管理和减少对石油和天然气的依赖的关键.
研究的目的:
- * 在模拟的地面条件下进行富含焦油煤热解的热力学研究.
- * 确定富含焦油煤的关键热力学函数 (内热量,吉布斯自由能量,).
- * 分析温度和压力对初级热解反应的影响.
主要方法:
- * 为富含焦油煤的标准热力学函数的确定.
- * 基于煤油组件的十个代表性初级热解反应的构建.
- *分析吉布斯自由能量和平衡常数在温度 (200800°C) 和压力 (大气到10MPa) 中的变化.
主要成果:
- * 形成的标准度: -72.27 kJ·mol−1.1.
- * 标准: -37.79 J·mol−1·K−1.1. 这就是.
- *标准形成的吉布斯自由能量: -60.01 kJ·mol-1.1.
- * 增加的压力 (大气压到10 MPa) 提高了所有初级热解反应的初始反应温度.
- *地下条件将初始反应温度转移到更高的梯度.
结论:
- *热力学数据为理解富含焦油煤的热解提供了基础.
- * 压力显著影响初始反应温度,在in situ条件下将其变高.
- *调整温度和压力可以指导in situ地下煤炭热解的产品分布.
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