Korea’s economy should develop a safe and cost-effective hydrogen transport system to realize the hydrogen economy. Among the methods of hydrogen transport, pipelines are the only feasible means of achieving cost-effective and safe transport over longer distances. This technical report proposes a method that would allow for using existing natural gas pipelines to transport mixed gas (hydrogen-natural gas). The properties of the mixed gas, the durability of the pipeline caused by hydrogen embrittlement, and gas loss from leakage are reviewed according to the hydrogen ratio. In addition, several separation methods of mixed gas are introduced. From the survey of international research or pilot projects, if hydrogen is blended with a concentration less than 20%, that does not significantly affect gas quality, safety, risk, materials, and network capacity. This study also suggests the suitable hydrogen supply methods for domestic use.

韩国经济应发展安全且具有成本效益的氢运输系统，以实现氢经济。在氢气运输方法中，管道是实现长距离经济和安全运输的唯一可行方式。该技术报告提出了一种允许使用现有天然气管道运输混合气体（氢气-天然气）的方法。根据氢比对混合气体的特性、氢脆引起的管道耐久性和泄漏气体损失进行了综述。此外，还介绍了几种混合气体的分离方法。从国际研究或试点项目的调查来看，如果氢气以低于 20% 的浓度混合，不会显着影响气体质量、安全、风险、材料、和网络容量。该研究还提出了适合家庭使用的氢气供应方法。