Unexpected Phenomena of Phosphoric Acid Fuel Cell concerning about Cell Life

Abstract

We have experienced many PAFC plants operation over ten years. In our operating experience, cell life is mainly restricted by operating mode, degree of hydrogen utilization and residual quantity of phosphoric acid. In this paper, we discuss details of life limiting factors, corrosion mechanism and examples of corrosion. As a result, those unexpected phenomena can be protected at initial stage if adequate detective methods are equipped.