CO₂ shipping is integral to expediting the implementation Capture Utilization and Storage (CCUS) initiatives within the United Kingdom. This study introduces a framework, encompassing techno-economic and environmental aspects, evaluating the maritime transportation of approximately 5.9 million tons of CO₂ annually from the Solent region, equivalent to removing around 1.3 million cars from the roads. The assessment covers carbon capture, liquefaction, maritime transport, energy utilization, and storage processes. The results highlight the significance of achieving economies of scale to enhance the cost-effectiveness of CCUS by maritime transport. Comparing vessels of two sizes, medium pressure and low pressure, the low-pressure vessel demonstrates superior cost-effectiveness and operational efficiency per unit of cargo. The Life Cycle Cost (LCC) analysis indicates that liquefaction (∼£20) and transportation (∼£19) account for around 73% of total costs. Strategies such as incorporating incentives in port dues could reduce transportation costs to around £13 per ton. Additionally, offering incentives for using renewable energy electricity can mitigate costs and environmental impact in the liquefaction process. Carbon capture technology and port-related expenses contributed around £13 and £1, respectively. The emission trading scheme significantly reduces LCC (by 69%) among all scenarios, emphasizing the need to increase carbon pricing beyond around £84 for low-pressure vessels and £118 for medium-pressure vessels to enhance competitiveness. However, the sensitivity analysis in each scenario reveals that electricity prices and the discount rate are key drivers influencing both the LCC and NPC of CO₂ transport projects.

Ship building, as an energy-intensive sector, produces significant amounts of air emissions, including greenhouse gases. Most research in greenhouse gas reductions from shipping concentrates on the reduction in emissions during the operational phase. However, as emissions during ship operation are reduced, the construction and dismantling phases of ships are becoming increasingly important in the assessment of the life-cycle impact of ships. In this study, priorities for a Turkish shipyard to become energy efficient were identified by means of a semi-structured questionnaire and an interview. This was undertaken using Fuzzy Multi-Criteria Decision-Making methods, including the Fuzzy Analytical Hierarchy Process and Fuzzy Order of Preference by Similarity to Ideal Solution, which are part of a proposed systematic and transdisciplinary Energy Management Framework and System. By applying Multi-Criteria Decision-Making methods, this framework supports the shipyard’s decision makers to make rational and optimized decisions regarding energy sectors within their activities. Applying the framework has significant potential to help achieve good product quality while reducing costs and environmental impacts, and can thereby enhance the sustainability of shipping. Moreover, the framework can boost both business and socio-economic perspectives for the shipyard, and improve its reputation and competitiveness, in alignment with achieving the Nationally Determined Contributions of States under the Paris Agreement.