High Level Analysis of CO2 Capture on LNG Fuelled Ships

Abstract

Recently, there has been an increased level of interest from the maritime sector towards ship based carbon capture (SBCC) as a way to achieve at least 50% emission reduction by 2050. The SBCC technology works especially well when integrated on LNG fuelled ships, which drastically reduces the variable OPEX of the system. This study considers the integration of a CO2 capture, liquefaction and temporary on-board storage plant on a hypothetical LNG fuelled ship. It is found that by heat integration of the exhaust gas with the capture plant, and the LNG vaporization with CO2 liquefaction, a capture percentage of ca. 80% can be achieved, using the available utilities. Additionally, a techno-economic analysis has been conducted which has shown that for the hypothetical vessel discussed in this work, the cost of CO2 capture is 168 €/ton CO2. For the future perspective, considering higher average loads of the engine/ship, and standardization of the technology, the cost of CO2 capture could theoretically drop to 45 €/ton CO2.