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May 7, 2026FuelOpen Access

Kinetic and thermodynamic evolution driven by oxygen gradients in underground coal gasification

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Authors

MDMaifan DongJSJiaxuan SunBQBotao Qin

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Overview

Randomized trial examines gas production outcomes in coal gasification using varied oxygen levels, suggesting optimal conditions for efficient energy production.

Key Points

  • This research aims to explore the impact of oxygen concentration gradients on coal gasification processes and their effects on gas production.
  • Developed a coupled kinetic-empirical model to simulate gas production behavior under different oxygen concentrations.
  • Focused on oxygen gradients from 0% to 100% to analyze coal reaction behavior during underground gasification.
  • Measured generation rates and contents of various gases, including CO, CO2, CH4, and H2, across oxygen conditions.
  • Under low oxygen conditions (<21% O2), CO production peaked at 0.23 mol/(kg·K) with a content of 0.75.
  • High oxygen concentrations (21%-100% O2) led to increased production of CO2, CH4, and H2.
  • The critical oxygen concentration for optimizing kinetic-thermodynamic parameters was identified as 8%.

Cite This Study

Dong et al. (2026) studied this question.

synapsesocial.com/papers/69fc2b608b49bacb8b3478fahttps://doi.org/10.1016/j.fuel.2026.139693
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Regulation of underground coal gasification by supercritical CO2 modification: synergistic evolution mechanism of pores, surface, and chemical states2026
  2. 2Research on the Low-Temperature Oxygen Consumption and Low-Oxygen Gas Emission Law in Goaf of Ultrathick Coal Seams2024 · 1 citations
  3. 3Experimental Study on the Activation Energy of Coal Oxidation Under Different Oxygen Concentrations2025
  4. 4Airflow Oxygen, CO, and CO2 Concentration Dynamics: Influence on Coal Oxidation Characteristics2026
  5. 5Thermodynamic characteristics and mechanism of low-rank coal oxidation in oxygen-poor environment2024 · 5 citations