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The supply, storage, and (international) transport of green hydrogen (H2) are essential for the decarbonization of the energy sector. The goal of this study was to assess the final cost-price and carbon footprint of imported green H2 in the market via maritime shipping of liquid organic hydrogen carriers (LOHCs), including dibenzyl toluene-perhydro-dibenzyltoluene (DBT-PDBT) and toluene-methylcyclohexane (TOL-MCH) systems. The study focused on logistic steps in intra-European supply chains in different scenarios of future production in Portugal and demand in the Netherlands and carbon tariffs between 2030 and 2050. The case study is based on a formally accepted agreement between Portugal and the Netherlands within the Strategic Forum on Important Projects of Common European Interest (IPCEI). Under the following assumptions, the results show that LOHCs are a viable technical-economic solution, with logistics costs from 2030 to 2050 varying between 0.30 and 0.37 €/kg-H2 for DBT-PDBT and 0.28–0.34 €/kg-H2 for TOL-MCH. The associated CO2 emissions of these international H2 supply chains are between 0.46 and 2.46 kg-CO2/GJ (LHV) and 0.55–2.95 kg-CO2/GJ (LHV) for DBT-PDBT and TOL-MCH, respectively.
Godinho et al. (Fri,) studied this question.