METHOD AND APPARATUS FOR PURIFYING AIR FOR FUEL CELL AND FUEL CELL

摘要

A method for purifying air for fuel cells wherein air to be supplied to a fuel cell is treated for removing factors in the air which contribute to lowering the electromotive force of the fuel cell is characterized in that a sulfur compound in the air is removed, thereby making the concentration of the sulfur compound in the air to be 5 ppb or less. When the concentration of a sulfur compound in air for a fuel cell is not more than 5 ppb, lowering of the electromotive force of the fuel cell due to the factors in the air can be almost completely prevented, thereby enabling to stably maintain the characteristics of the fuel cell for a long time and to extend the life of the fuel cell.