Efficient Hydrogen Energy Transportation through Natural Gas Pipelines

Strategic Insights -

Recent research from the China University of Petroleum has led to promising findings on the potential of hydrogen energy as a clean, abundant, and widely applicable energy source. Using natural gas pipelines for long-distance hydrogen transportation is expected to become a significant hydrogen transport method. The study highlights the importance of efficiently recovering hydrogen at pipeline terminals, where the core challenge lies in effectively separating H2/CH4.

Key Takeaways:

  • The China University of Petroleum research proposes a hybrid membrane/absorption-adsorption separation process to efficiently recover hydrogen at pipeline terminals.
  • Mathematical models have been constructed for the membrane separation unit, the absorption-adsorption separation unit, and the hybrid membrane/absorption-adsorption separation process.
  • Sensitivity analysis determined suitable operating parameter ranges for the hybrid process, which were then optimized using a multi-objective optimization model to maximize hydrogen recovery ratio and minimize energy consumption.
  • Results show that the proposed process can enrich H2 concentration in product gas from 20 to 99.97 mol%, with hydrogen recovery ratios ranging from 98 to 98.93% and energy consumption per unit of feed gas ranging from 0.2233 to 0.2757 kW·h−1/Nm³, under different scenarios at the natural gas receiving station.
  • The hybrid process offers a more efficient method of hydrogen separation compared to traditional methods, such as single-stage membrane separation and fixed-bed pressure swing adsorption.

Statistics:

  • 20-99.97 mol%: H2 concentration in product gas enrichment
  • 98-98.93%: Hydrogen recovery ratios
  • 0.2233-0.2757 kW·h−1/Nm³: Energy consumption per unit of feed gas
  • 0.9417-1.1611 kW·h−1/Nm³: Energy consumption per unit of product gas

Sources:

  • NewsRx. Findings from China University of Petroleum Provides New Data on Energy (Hybrid Membrane/absorption-adsorption Separation of Hydrogen-blended Natural Gas At Receiving Terminal: Process Modelling and Multi-objective Optimization). Energy Weekly News. July 18, 2025; p 91.
  • Hybrid Membrane/absorption-adsorption Separation of Hydrogen-blended Natural Gas At Receiving Terminal: Process Modelling and Multi-objective Optimization. Separation and Purification Technology, 2025;360.