| 摘要 |
PROBLEM TO BE SOLVED: To separate and fix all the carbon component in spent fossil fuel as carbon dioxide gas, and recover by-produced high purity nitrogen and argon gas by utilizing the maximum energy-saved generation by fuel cell generation. SOLUTION: A fuel cell is operated at a prescribed temperature and pressure, and the exhaust air of the cell air electrode is subjected to a pressure swing at a prescribed ratio by a PSA device. The exhaust fuel 5 and exhaust air 8 leaving the cell are cooled to separate moisture 6, 9, and then introduced to a reformer combustion burner and a PSA oxygen separating device, respectively. Since the adsorbent of the oxygen PSA hardly adsorbs Ar gas, Ar gas is condensed in the taken oxygen product at substantially the same recovering ratio as oxygen. The nitrogen product leaving the PSA is pressurized and supplied to the outside, and the oxygen side is heat-exchanged within the process together with the exhaust fuel of the fuel cell, and introduced to the burner of a reformer after the temperature is raised. On the heating side of the reformer, a fuel electrode outlet fluid 6 from which the moisture is separated is substantially stoichionetrically burnt with an oxygen side fluid 10 as oxidizing agent. The carbon dioxide gas in this exhaust gas is supplied to an urea and ammonia synthesizing factory. |
