| 摘要 |
PURPOSE:To prepare atmospheric gas containing oxygen in low concn., by passing a gaseous mixture of reducing fuel and oxygen-containing stock gas through an oxidizing catalyst while controlling the flow amounts of both components to perform catalytic combustion. CONSTITUTION:Reducing fuel 1 such as H or CO and stock gas 2 containing oxygen in predetermined concn. are introduced into a mixer 5 respectively through a flow controller 3 and a stock gas flow amount controller 4 and, after mixing, the gaseous mixture is introduced into an oxidizing catalyst zone 6 prepared by supporting a catalyst metal such as platinum or rhodium by a carrier to subject the reducing fuel 1 to catalytic combustion. On the other hand, the oxygen concn. in the formed combustion exhaust gas is detected by a detector 7 and the obtained signal is connected to the fuel flow amount controller 3 of the reducing fuel 1 and the stock gas flow amount controller 4 through a controller 8. Therefore, atmospheric gas containing a constant amount of oxygen can be produced. |
