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Comparative assessment of methanol and ammonia: Green fuels vs. hydrogen carriers in fuel cell power generation

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  • Sánchez, Antonio
  • Blanco, Elena C.
  • Martín, Mariano

Abstract

Methanol and ammonia emerge as two of the most important energy carriers in a new decarbonized society. In this work, a systematic assessment of the power generation based on these chemicals is performed using two different alternatives: direct utilization as green fuels in fuel cells or as carriers for hydrogen. Despite the need for a previous stage for hydrogen production, the use of these chemicals as hydrogen carriers demonstrates higher efficiencies (around 40%), mainly due to the higher degree of maturity of the hydrogen fuel cells. This is reflected in the cost of electricity for the different alternatives with around 700 €/MWh for hydrogen carrier options and about 1200 €/MWh for the direct utilization as green fuels. Compared to hydrogen, the use of methanol or ammonia has a higher electricity production cost. However, future improvements in the efficiency of fuel cell units could convert these fuels is competitive options. In addition, for different scenarios combining transportation and power generation, methanol and ammonia emerge as technically and economically feasible alternatives, especially for distances over 3000 km. Consequently, both hold a pivotal role in addressing the challenges associated with hydrogen within a future energy systems characterized by high renewable penetration.

Suggested Citation

  • Sánchez, Antonio & Blanco, Elena C. & Martín, Mariano, 2024. "Comparative assessment of methanol and ammonia: Green fuels vs. hydrogen carriers in fuel cell power generation," Applied Energy, Elsevier, vol. 374(C).
    • Handle: RePEc:eee:appene:v:374:y:2024:i:c:s0306261924013928
    DOI: 10.1016/j.apenergy.2024.124009
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