D4.3.1 TEA and LCA framework document for EverLoNG case studies

Two case studies are central to this analysis: the Sleipnir semi-submersible crane vessel and a new-built LNG carrier from TotalEnergies. These vessels represent different operational profiles and fuel use scenarios, with CO2 capture rates reaching up to 95% under optimal conditions. Ports of Rotterdam in The Netherlands and Port Arthur in Houston, US serve as hubs for unloading captured CO2, which is either permanently stored in projects like Northern Lights and Aramis or utilized for enhanced oil recovery (EOR) or chemical production (methanol/methane). The TEA evaluates financial metrics, including capital and operational costs for the on-board part, onshore part and the full chain with the necessary assumptions, while the LCA assesses environmental impacts across the CO2 capture and storage/utilization lifecycle. Key findings will guide the development of scalable SBCC solutions, emphasizing integration with existing port and storageinfrastructure. This document outlines the framework for conducting Techno-Economic Analysis (TEA) and Life CycleAssessment (LCA) to evaluate the feasibility, costs, and environmental impacts of SBCCimplementation.