Transition metal recovery method and transition metal recovery device

摘要

PROBLEM TO BE SOLVED: To provide a recovery method for transition metal recovering the transition metal from a fuel cell without dismantling the fuel cell, and a recovery system for the transition metal.SOLUTION: A recovery method for transition metal of one embodiment includes: a step of supplying dissolving solution to a fuel electrode passage inlet supplying fuel gas to a fuel cell or a fuel electrode passage outlet exhausting the fuel gas from the fuel cell and immersing a fuel electrode into the dissolving solution; a step of supplying the dissolving solution to an air electrode passage inlet supplying air to the fuel cell or an air electrode passage outlet exhausting the air from the fuel cell and immersing an air electrode into the dissolving solution; a step of applying a voltage to the fuel electrode and the air electrode and dissolving the transition metal contained in the fuel electrode and the air electrode into the dissolving solution; a step of discharging the dissolving solution containing the transition metal from the fuel electrode passage outlet or the fuel electrode passage inlet; and a step of discharging the dissolving solution containing the transition metal from the air electrode passage outlet or the air electrode passage inlet.SELECTED DRAWING: Figure 2