REPLENISHMENT OF PHOSPHORIC ACID IN PHOSPHORIC ACID TYPE FUEL CELL

PURPOSE:To atomize and replenish a phosphoric acid at operation stop by atomizing an aqueous solution containing the phosphoric acid with preset weight using gas and replenishing it to a matrix layer through a replenishing path together with the carrier gas at operation stop. CONSTITUTION:When a pho...

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Bibliographische Detailangaben
1. Verfasser:	KONDOU KAZUO
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	PURPOSE:To atomize and replenish a phosphoric acid at operation stop by atomizing an aqueous solution containing the phosphoric acid with preset weight using gas and replenishing it to a matrix layer through a replenishing path together with the carrier gas at operation stop. CONSTITUTION:When a phosphoric acid is replenished to a matrix layer, a valve 8a is set to OFF and oxidizing agent gas also stops being supplied at the same time. Then, after the operation of a fuel cell is stopped, a valve 8c is set to ON and inert gas is jetted in the nozzle 10 of a phosphoric acid aqueous solution atomization device 9 toward the liquid level of the phosphoric acid aqueous solution of 70-85% in weight percentage. Consequently, the phosphoric acid aqueous solution is atomized and is contained in the section 4a of a separator 4 with ribs for supplying reaction gas from the manifold of fuel gas and then the phosphoric acid is supplied to the matrix layer 1 through the pore 2a of a hydrogen electrode 2. As a result, the phosphoric acid can be atomized and replenished at operation.