Performance Assessment of an Exhaust Gas CO2 Absorption (EGCA) System Installed on a 1.075-MW HiMSEN 5H22CDF Engine

Abstract

The management of CO2 emissions from fossil fuel-powered ships has been considered for complying with future enhancements in CO2 emission regulations in the shipbuilding industry. These regulations are (or will be) enforced using indexes such as the energy efficiency design index, energy efficiency existing index, energy efficiency operational indicator, and carbon intensity indicator. Hence, developing technology for reducing CO2 emissions from ships is necessary. This paper reports on the CO2 absorption performance of a pilot-scale CO2 capture system installed on a 1.075-MW HiMSEN 5H22CDF engine. The proposed technology is an exhaust gas CO2 absorption (EGCA) system. Our CO2 capture system is based on an exhaust gas cleaning system, which is already commercialized to reduce SOx emissions from ships that use heavy fuel oil. The CO2 absorption performance of the EGCA system was evaluated following the test procedure described in the NOx Technical Code 2008 (NTC 2008). Under the certified test procedure described in NTC 2008, the EGCA system exhibited 29/30 wt% (E2/E3 test mode) of CO2 absorption. On the basis of the test results, we expect that ships will be able to comply with future CO2 emission regulations by using the proposed EGCA system.