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相关概念视频

Physical Principles Governing Gas Exchange01:16

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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...
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Passive Diffusion: Overview and Kinetics

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Passive diffusion is a critical process that allows small lipophilic drugs to cross the cell membrane along a concentration gradient. This mechanism's efficiency depends on four primary factors: the membrane's surface area, the drug's lipid-water partition coefficient, the concentration gradient, and the membrane's thickness.
When administered orally, drugs establish a substantial concentration gradient between the gastrointestinal (GI) lumen and the bloodstream, expediting...
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Calorimeters are useful to determine the heat released or absorbed by a chemical reaction. Coffee cup calorimeters are designed to operate at constant (atmospheric) pressure and are convenient to measure heat flow (or enthalpy change) accompanying processes that occur in solution at constant pressure. A different type of calorimeter that operates at constant volume, colloquially known as a bomb calorimeter, is used to measure the energy produced by reactions that yield large amounts of heat and...
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A Uniaxial Compression Experiment with CO2-Bearing Coal Using a Visualized and Constant-Volume Gas-Solid Coupling Test System
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基于扩散模型的深层煤层气体含量评估方法的优化.

Shilong Li1, Songhang Zhang1, Jian Wu1,2

  • 1School of Energy Resources, China University of Geosciences, Beijing 100083, China.

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概括

准确估计深层煤床甲 (CBM) 储库中丢失的气体至关重要. 本研究引入了一种新的MCF20方法,用于改进气体损耗计算,其性能优于现有模型,并与压力保存的结结果保持一致.

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科学领域:

  • 地球科学 地球科学 地球科学
  • 石油工程是石油工程中的一个.
  • 地质化学 地质化学

背景情况:

  • 精确的气体含量确定对于煤床甲 (CBM) 勘探和开发至关重要.
  • 对于气体含量评估的传统现场脱吸方法容易出现重大错误,特别是在深深的CBM储中.
  • 复杂的CBM发生状态和深水库中延长的扩散时间加剧了传统气体含量评估中的错误.

研究的目的:

  • 为了比较各种气体扩散和丢失气体预测模型在深层CBM储库中的性能.
  • 提出和评估一种修改后的气体损失计算方法,准确描述甲扩散.
  • 确定启动时间和影响CBM采样过程中气体损失的关键因素.

主要方法:

  • 对现有的气体扩散和气体丢失预测模型进行比较分析.
  • 开发和验证用于气体损耗计算的新型修改曲线拟合 (MCF20) 方法.
  • 对拟议方法的评估与压力保存的核心数据进行对比.

主要成果:

  • 双分散扩散模型证明,它最适合在深深的CBM储中进行气体扩散.
  • 使用核心开采的开始作为气体损失计算的零点,对于深层煤层来说在地质上更准确.
  • 拟议的MCF20方法显著减少了错误,并且与压力保存核心提取结果有很强的一致性,性能优于USBM和ACF方法.

结论:

  • 建议使用MCF20方法作为最优的方法来准确评估深层CBM储中的气体含量.
  • 气体损失与逃逸时间,Ro,固定碳含量和绳芯提取期间的维特里尼特含量密切相关.
  • 准确估计丢失的气体对于可靠的CBM资源评估和开发规划至关重要.