Comparative analysis among different alternative fuels for ship propulsion in a well-to-wake perspective
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Summary
This summary is machine-generated.The maritime industry must cut greenhouse gas (GHG) emissions using alternative fuels. A Well-to-Wake analysis shows green fuels significantly reduce emissions compared to fossil fuels, aiding IMO goals.
Area Of Science
- Maritime environmental science
- Chemical engineering
- Sustainable energy
Background
- International Maritime Organization (IMO) mandates significant greenhouse gas (GHG) emission reductions in shipping.
- Achieving these targets necessitates advancements in logistics, digitalization, hydrodynamics, machinery, energy, and aftertreatment technologies.
- Alternative fuels present a substantial opportunity for mitigating shipping's environmental impact.
Purpose Of The Study
- To evaluate Well-to-Wake (WtW) CO2 equivalent emission factors for Liquefied Natural Gas (LNG), methanol, and ammonia.
- To compare the emissions performance of these alternative fuels produced via fossil and renewable pathways.
- To assess the potential of alternative fuels in reducing GHG emissions within the shipping sector.
Main Methods
- Conducted an extensive bibliographic research on WtW emission factors for alternative marine fuels.
- Utilized a case study involving a cruise ship with two distinct operational profiles.
- Calculated and compared CO2 equivalent emission factors using a WtW approach.
Main Results
- Significant variations in WtW emissions were observed based on fuel production pathways (grey vs. green).
- The case study demonstrated that green methanol and ammonia offer substantial GHG emission reductions compared to fossil-derived fuels.
- Carbon Intensity Indicator (CII) results validated the effectiveness of green alternative fuels.
Conclusions
- The WtW approach is crucial for a holistic assessment of alternative marine fuels' environmental impact.
- Green production pathways for LNG, methanol, and ammonia are key to achieving deep GHG emission cuts in shipping.
- Transitioning to sustainable alternative fuels is vital for the maritime sector to meet IMO's climate objectives.
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