| 摘要 |
PURPOSE: To effectively take electricity out of a fuel cell by converting a fuel into gases containing H2 and CO by contact reaction, adding existing CO to H2 , sending the H2 -containing gas to a fuel cell, and reacting the gas with O2 gas in air, and generating electricity. CONSTITUTION: A hydrocarbon-based fuel is supplied to a desulfurization apparatus 2 through a line 1 and the resultant desulfurized fuel is sent to a steam reformer 4. Then, a gas containing H2 , CO is sent to a heat exchanger 10, cooled to a desirable temperature so that heat turns to steam in a steam drum 12. The cooled gas is supplied to a conversion reactor 14 and most part of CO in the gas is converted into steam to generate H2 gas. The resultant gas is cooled by cooling water from a line 17 in a heat exchanger 16 and condensed impurities are discharged out of a line 20. The H2 -containing gas is sent to an anode chamber of a fuel cell unit 25, the O2 -containing gas is sent to a cathode chamber, and electricity is generated. The driving temperature of the cell is at lowest 125 deg.C and the temperature difference of the driving temperature and the temperature of the gas supplied to the conversion reactor is controlled be within 50 deg.C. |
