| 摘要 |
PURPOSE:To miniaturize the above device and to effectively utilize generated heat by providing a reforming catalyst layer in the outside tube of double tube type reaction tubes and providing a heat exchange layer and a CO denaturing catalyst layer in the inside tube. CONSTITUTION:Gaseous raw materials 20 formed by mixing steam with gaseous hydrocarbon are preheated and are admitted from an inlet 8 to the bottom end of the reaction tubes 3 and are made to flow upward in the reforming catalyst layer 15. On the other hand, a combustion gas 19 of >=1000 deg.C is sent from a riser pipe 7 to the upper part of a housing container 1 and is moved downward around the reaction tubes 3 to heat the gaseous raw materials 20 via the outside tube 13, by which the gaseous raw materials are changed to about 800 deg.C gas essentially consisting of hydrogen and CO. This gas is sent to an annular regenerating path 17 consisting of the inside tube 14 and a plug tube 16 and is subjected to the heat exchange with the gaseous raw materials 20 to drop the temp. of the gaseous raw materials down to 400 to 550 deg.C prescribed temp. The gaseous raw materials are then sent to the denaturing catalyst layer 22 having a regulating pipe 23 for regulating the catalyst quantity and flow rate to lower the content of the CO down to the concn. at which the CO does not act as a catalyst poison of the electrode catalyst of a fuel battery. The reformed gas 21 is obtd. from a gas outlet 11. |
