분리막-PSA 혼성 공정을 적용한 대용량 COG 정제시설의 사고 영향 분석 = Consequence Analysis of a Large Scale of Membrane-PSA Hybrid Hydrogen Purification Process Using Coal Off Gas

다국어 초록 (Multilingual Abstract)

This study presents a quantitative risk assessment of a hydrogen purification system utilizing coal off gas (COG) from steelworks, based on a membrane-PSA hybrid process. A scale-up scenario of 5,000Nm3/h capacity was evaluated using DNV's PHAST 9.0 simulation software to analyze accident scenarios involving high-pressure flammable gas leakage. The analysis focused on the dispersion of gas clouds, jet fire thermal radiation, and vapor cloud explosion (VCE) overpressure impact. The results showed that the flammable gas dispersion extended up to 101m (at 50% LFL), jet fire radiation reached up to 60m, and VCE overpressure impacted areas up to 165m.
These findings highlight the need to establish safety isolation distances in facility layout and protection zoning. Elevated risk under nighttime and high-wind conditions suggests that ignition source control and reliable gas detection-shutdown systems are essential. The outcomes of this study provide quantitative insights for multi-layered safety design and risk mitigation in hydrogen purification infrastructure.