Complete recovery of released ammonia from fuel supply system of ammonia fueled ship using novel adsorption unit

As ammonia emerges as a promising zero carbon marine fuel, addressing the challenges associated with its toxicity and handling has become critical for safe onboard operation. Among various operational requirements, nitrogen purging is required to safely remove residual ammonia from the fuel supply system during emergency operation or maintenance procedures. However, the released ammonia poses environmental and safety risks due to its high toxicity, necessitating the development of an effective recovery system. This study presents a comprehensive dynamic simulation of the nitrogen purging process in an ammonia fuel supply system using Aspen HYSYS, where the flow characteristics of the discharged ammonia were analyzed under varying purging conditions. To evaluate recovery strategies, an adsorption unit adopting newly synthesized zeolite-13X impregnated with 0.5 wt% MgCl 2 was designed. An …