Hydrogen Blending in Natural Gas Pipelines Facilitates Renewable Energy Integration and Cost-Effective Hydrogen Transport

Strategic Insights -

Researchers at Southwest Petroleum University in Chengdu, People's Republic of China, have published a study on the feasibility of hydrogen blending in natural gas pipelines. According to the study, hydrogen blending facilitates renewable energy integration and cost-effective hydrogen transport. The research employed numerical simulations to analyze the flow dynamics of hydrogen-methane mixtures in horizontal and undulating pipelines. The findings provided theoretical insights for safety assessments of hydrogen-natural gas co-transport and practical guidance for pipeline design optimization.

Key Takeaways:

  • The study found that hydrogen concentrations stabilize near initial values across pressure variations in horizontal pipelines, with minimal deviation of up to 1.6%.
  • In undulating pipelines, increasing the span length of elevated sections reduces maximum hydrogen concentration while maintaining proximity to initial levels under constant pressure.
  • Monitoring points exhibit concentration fluctuations with changing pipeline parameters, though no persistent stratification occurs.
  • The research concluded that increasing the undulating height elevation difference leads to an increase in the maximum hydrogen concentration at the top of the pipeline, rising from 3.74% to 9.98%.
  • The study highlights the importance of understanding hydrogen concentration distribution due to its lower density and higher leakage potential compared to natural gas.
  • The findings provide practical guidance for pipeline design optimization and safety assessments of hydrogen-natural gas co-transport.
  • The research was funded by the National Key R&D Program and Sichuan Science And Technology Program.

Statistics:

  • Maximum increase in hydrogen concentration in horizontal pipelines: 1.6%
  • Maximum increase in hydrogen concentration in undulating pipelines: 0.65%
  • Initial hydrogen concentration: 3.74%
  • Maximum hydrogen concentration at the top of the pipeline: 9.98%
  • Pressure range investigated: 3-8 MPa
  • Pipeline geometry parameters investigated: horizontal and undulating pipelines with varying span length and elevation difference

Sources:

  • Numerical Simulation Study of Gas Stratification in Hydrogen-Enriched Natural Gas Pipelines. Energies, 2025, 18(12):3181.
  • Tianlei Li et al. State Key Laboratory of Oil and Gas Reservoir Geology and Engineering, Southwest Petroleum University, Chengdu 610500, People's Republic of China.