*6.1. FMEA Analysis Results of Fuel Cell System*

Based on the FMEA results for the fuel cell system, three systems were examined from highest to lowest RPN, the results of which can be found below.


Even if the sulfur component contained in the natural gas is 0.2 ppm or less, the desulfurization process is required because the activity of the steam reforming catalyst is lowered and the electrode in the MCFC is poisoned, thereby greatly reducing the performance. Desulfurization methods include hydrogen desulfurization (HDS) and the use of absorbents for desulfurization. The method mentioned in this paper is the use of absorbents, which use activated carbon to absorb and remove sulfur. It is coated with a catalyst to enhance the absorption of sulfur. If this coating is not sufficient, the performance of the absorbent may be degraded. Table 7 is the FMEA results of the ship MCFC system [41].


 **7.** The FMEA results of the ship MCFC system.

**Table**

#### *J. Mar. Sci. Eng.* **2020**, *8*, 74


#### *J. Mar. Sci. Eng.* **2020**, *8*, 74

**Table 7.** *Cont.*
