CO SELECTIVE OXIDATION METHOD AND CO SELECTIVE OXIDATION REACTOR

摘要

PPROBLEM TO BE SOLVED: To provide a CO selective oxidation method and a CO selective oxidation reactor to be used for allowing carbon monoxide (CO) included in a reformed gas produced by reforming a hydrocarbon fuel such as city gas, LPG, kerosene and biogas to selectively react with oxygen to be removed, wherein a noble metal-based catalyst for CO selective oxidation is unnecessary. PSOLUTION: A Cu-based CO selective oxidation catalyst 17 is formed by depositing CuO as an active metal on a CeOSB2/SBcarrier mixed with AlSB2/SBOSB3/SB. A cooling pipe 21 to which a cooling fin 24 is attached is disposed in a square cylindrical chamber 18 having a gas inlet 19 at the lower end and a gas outlet 20 at the upper end, and functioning as a gas passage 16 inside. The both ends of the cooling pipe 21 are made to penetrate through the side walls of the chamber to protrude outward, and are respectively connected to a supply line 22 and a discharge line 23 of cooling water 12. The square cylindrical chamber 18 is charged with the Cu-based CO selective oxidation catalyst 17, and the gas inlet 19 and the gas outlet 20 are sealed with a porous catalyst receiving plate 25 to form the CO selective oxidation reactor 15. By allowing a reformed gas 8 of hydrocarbon fuel with addition of oxygen or air to flow in the gas passage 16 and bringing into contact with the Cu-based CO selective oxidation catalyst 17, CO in the reformed gas 9 is selectively oxidized to reduce the CO concentration. PCOPYRIGHT: (C)2008,JPO&INPIT