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Quantitative Risk Assessment of a Liquid Organic Hydrogen Carriers-Based Hydrogen Refueling Station
채혜진,계혜리,이주성,Esmaeili Arash,이가영,윤택상,임전영,송대성,이철진 한국화학공학회 2024 Korean Journal of Chemical Engineering Vol.41 No.5
The demand for hydrogen, a carbon–neutral fuel, is expected to increase in the coming decades. However, the current storage effi ciency of gaseous hydrogen is poor. Liquid organic hydrogen carriers (LOHCs), which store hydrogen in liquid form under ambient conditions, show promise for on-site hydrogen refueling stations. Toluene-methylcyclohexane is one of the LOHC, it has advantages cost-eff ect and environmentally to large-scale hydrogen transportation, but it should be evaluated risk assessment based on the chemicals, because there is inherent harm from the properties like toxicity or fl ammability. Herein, quantitative risk assessment (QRA) results for worst-case scenarios, individual risk (IR), and societal risk (SR) for a methylcyclohexane-based on-site hydrogen refueling station (MHRS) are compared with those a gaseous hydrogen refueling stations (GHRS). The latter is more likely to have explosion-related accidents, while the former is more likely to have had fi re-related accidents. Both show similarly high societal risks. The rupture of the MCH storage tank poses the most signifi cant risk, but installing a dike reduces by 86%, thereby placing it within acceptable limits. Thus, the key risk factors for future on-site hydrogen refueling stations are identifi ed and insights into mitigating them are off ered.
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