关于气体压力场在向装载煤炭注入气体时的时空进化特征的研究
Kan Zhou1,2, Jinfeng Guan3, Xionggang Xie4
1School of Materials and Architectural Engineering, Guizhou Normal University, Guiyang 550025, Guizhou, China.
ACS omega
|May 19, 2025
概括
研究煤炭中的气体注入揭示了不同的压力动态. (N2) 导致压力迅速增加,而二氧化碳 (CO2) 由于吸附而显示初始下降,影响煤炭安全.
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:
- 了解煤炭内的气体压力动态对于安全高效的气体注入操作至关重要.
- 煤炭的多孔结构和吸附特性在注入过程中显著影响气体的行为.
研究的目的:
- 分析在 (N2) 和二氧化碳 (CO2) 注入过程中煤炭内部气体压力的时空分布.
- 为了比较由弱吸附性 (N2) 与强吸附性 (CO2) 气体引起的压力变化.
- 为了安全应用,探索气体吸附对煤炭内部压力的影响.
主要方法:
- 结合实验研究和理论分析,研究内部气体压力变化.
- 在0.7 MPa的恒定注入压力下,利用了N2和CO2作为源气体.
- 在煤中分析压力差异和气体状态 (自由与吸附).
主要成果:
- 在注入过程中,煤炭内的气体压力分布不均,最大压力差约为0.17MPa.
- N2注入导致了由于其自由状态的快速初始压力上升,随后随着N2的退出而下降.
- 二氧化碳注入导致最初的压力下降,因为它吸附在煤炭上,随后随着和的接近而缓慢增加.
结论:
- 注射气体的吸附特性 (N2与CO2) 显著改变了煤炭内部压力动态.
- 调查结果提供了关于选择合适的注射气体用于煤床甲回收和管理安全风险的见解.
- 了解这些压力变化对于优化煤层气体注入策略至关重要.
相关概念视频
Basic Equation for Pressure Field
186
The basic equation for a pressure field in fluid mechanics captures the balance of forces within any segment of fluid, providing a foundational understanding of how pressure changes within fluids under various forces. Generally, two main types of forces act on any part of a fluid: surface forces and body forces. Surface forces arise from pressure differences across points within the fluid, which result in net forces that can vary depending on the local pressure gradient. Body forces, on the...
186
Gas Chromatography: Sample Injection Systems
319
In gas chromatography, the sample is introduced as a vapor plug into the carrier gas stream for high efficiency and resolution. A microsyringe injects the sample solution into a heated sample port, vaporizing it and mixing it with the carrier gas. This process is important to ensure the sample is properly prepared for analysis. Thermally sensitive samples can be injected directly into the column and volatilized by slowly increasing the column temperature.
Two primary injection methods are used...
Two primary injection methods are used...
319
Kinetic Molecular Theory and Gas Laws Explain Properties of Gas Molecules
32.2K
The test of the kinetic molecular theory (KMT) and its postulates is its ability to explain and describe the behavior of a gas. The various gas laws (Boyle’s, Charles’s, Gay-Lussac’s, Avogadro’s, and Dalton’s laws) can be derived from the assumptions of the KMT, which have led chemists to believe that the assumptions of the theory accurately represent the properties of gas molecules.
32.2K
Pressure Variation in a Fluid at Rest
194
In a fluid at rest, the pressure at any point beneath the fluid surface depends solely on the depth, not on the container's shape or size. This principle, known as hydrostatic pressure, arises because, in stationary fluids, there is no acceleration, meaning the forces within the fluid balance out. Only vertical forces, caused by the weight of the fluid above, contribute to pressure changes with depth.
When measuring pressure at two different levels within the fluid, the difference in...
When measuring pressure at two different levels within the fluid, the difference in...
194
Physical Principles Governing Gas Exchange
1.6K
Gas behavior plays a vital role in understanding bodily processes such as external and internal respiration. External respiration involves the diffusion of oxygen into the blood and carbon dioxide out of it in the lungs. In contrast, internal respiration happens in body tissues, where these gases move in opposite directions.
Gas Laws Governing Respiration
The behavior of gases is guided by Dalton's Law of partial pressures and Henry's Law.
Dalton's Law asserts that the total...
Gas Laws Governing Respiration
The behavior of gases is guided by Dalton's Law of partial pressures and Henry's Law.
Dalton's Law asserts that the total...
1.6K
Molecular Kinetic Energy
4.9K
The word "gas" comes from the Flemish word meaning "chaos," first used to describe vapors by the chemist J. B. van Helmont. Consider a container filled with gas, with a continuous and random motion of molecules. During collisions, the velocity component parallel to the wall is unchanged, and the component perpendicular to the wall reverses direction but does not change in magnitude. If the molecule’s velocity changes in the x-direction, then its momentum is changed.
4.9K


