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Dissociative Adsorption of Hydrogen in Hydrogen-Blended Natural Gas Pipelines Studied by Researchers from Xi'an University of Science and Technology

Strategic Insights

— 1 min read

Researchers from the Xi'an University of Science and Technology have made new discoveries in the field of applied sciences, particularly in the area of dissociative adsorption of hydrogen in hydrogen-blended natural gas pipelines. The study, published in the journal Applied Sciences, employed first principles calculations and thermodynamic analyses to investigate the dissociative adsorption of hydrogen on the Fe(110) surface. The results of the study have significant implications for optimizing hydrogen transport technology in natural gas pipelines and mitigating hydrogen embrittlement.

Key Takeaways:

  • The study found that the adsorption energies of hydrogen at different sites on the iron surface are -1.98 eV (top site), -2.63 eV (bridge site), and -2.98 eV (hollow site), with the hollow site being the most stable adsorption position.
  • Thermodynamic analysis revealed that under operational conditions of 25 °C and 12 MPa, the Gibbs free energy change (DG) for hydrogen dissociation is -1.53 eV, indicating that the process is spontaneous under pipeline conditions.
  • The study concluded that the findings provide a theoretical basis for optimizing hydrogen transport technology in natural gas pipelines and offer scientific support for mitigating hydrogen embrittlement, improving pipeline material performance, and developing future hydrogen transportation strategies and safety measures.
  • The study was funded by the National Natural Science Foundation of China and the Science And Technology Plan of Yulin City, Shaanxi Province.
  • Authors of the study include Wei He, Zhenmin Luo, Pengyu Zhang, Ruikang Li, and Xi Yang from the School of Safety Science and Engineering, Xi'an University of Science and Technology.

Statistics:

  • The adsorption energies of hydrogen at different sites on the iron surface were found to be -1.98 eV (top site), -2.63 eV (bridge site), and -2.98 eV (hollow site).
  • The Gibbs free energy change (DG) for hydrogen dissociation under operational conditions of 25 °C and 12 MPa was found to be -1.53 eV.
  • The study concluded that the process is spontaneous under pipeline conditions, indicating a significant improvement in hydrogen transport efficiency.

Sources:

  • Wei He, Zhenmin Luo, Pengyu Zhang, Ruikang Li, and Xi Yang. "Dissociative Adsorption of Hydrogen in Hydrogen-Blended Natural Gas Pipelines: A First Principles and Thermodynamic Analysis." Applied Sciences, vol. 15, no. 13, 2025, pp. 7342, doi: 10.3390/app15137342.
  • National Natural Science Foundation of China
  • Science And Technology Plan of Yulin City, Shaanxi Province
  • MDPI AG (publisher of Applied Sciences)
  • Xi'an University of Science and Technology, School of Safety Science and Engineering

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