Objective The depletion of fossil energy and growing environmental challenges have necessitated a continuous focus on the development and utilization of renewable energy sources. Hydrogen energy, in particular, has garnered significant attention for its abundant resources and clean, pollution-free characteristics. Utilizing existing natural gas pipelines for hydrogen-blended transmission offers an effective means to achieve “dual carbon” goals. However, potential safety hazards associated with this method must not be overlooked.
Methods To promote the safe development of the hydrogen economy, this paper examined the pipeline transmission of hydrogen-blended natural gas. It summarized the current research on pipelines, pressure-regulating equipment, storage systems, metering devices, and terminal applications within the hydrogen-blended transmission framework. Additionally, it discussed the impact of hydrogen blending on the performance of compressors, hydrogen storage cylinders, flowmeters, gas appliances, gas turbines, and other equipments, while identifying the risk of hydrogen embrittlement in distribution and trunk pipelines. On this basis, the future research directions for hydrogen pipeline transmission technology were explored.
Results During hydrogen-blended natural gas pipeline transmission, it should pay close attention to the impact of hydrogen blending on each process, establish the appropriate blending ratio based on the specific working conditions of equipment and pipelines, and adjust it according to changes in performance parameters to prevent safety accidents.
Conclusion Currently, China has made some advancements in the hydrogen blending technology for natural gas pipelines; however, further breakthroughs are needed to address technical challenges and systematically analyze mechanisms such as hydrogen embrittlement, permeation, and leakage. It is imperative to establish a comprehensive technical standard system for the design, construction, and operation of hydrogen-blended natural gas pipelines to lead or participate in the development of relevant international regulations and standards.
DownLoad: