Comparative evaluation of carbon capture separation technologies for shipboard applications using multi-criteria...

Area of Science:

• Environmental Science
• Marine Engineering
• Chemical Engineering

Background:

• Maritime transport contributes significantly to global CO₂ emissions, necessitating decarbonization efforts.
• Ship-based carbon capture systems (CCS) are crucial for meeting stringent environmental regulations and reducing emissions in the shipping industry.

Purpose of the Study:

• To evaluate and rank various carbon capture methods and technologies for maritime applications.
• To develop a robust decision-making framework for selecting optimal shipboard CCS solutions.

Main Methods:

• A multi-criteria decision-making framework was employed, integrating the Analytic Hierarchy Process (AHP) with entropy weighting.
• Six criteria were assessed: maturity, efficiency, energy demand, cost, applicability, and safety.
• Sensitivity and bounded perturbation analyses were performed to ensure the robustness of the findings.

Main Results:

• Post-combustion carbon capture was identified as the most suitable method for shipboard applications.
• Chemical adsorption ranked as the top technology, followed by chemical looping combustion and membrane separation.
• The established rankings demonstrated stability against variations in criterion weights and performance scores.

Conclusions:

• The hybrid AHP-entropy framework provides a reliable decision-support tool for evaluating maritime CCS.
• Chemical adsorption presents a viable and effective solution for carbon capture in the shipping sector.
• This research aids in the strategic implementation of CCS technologies to achieve maritime decarbonization goals.