| 摘要 |
A nitrogen oxide purifying apparatus includes a gas absorption vessel (1) and a condenser (6), where the vessel receives an absorption solution containing liquefied N 2 O 4 for absorbing NO and also receives a source gas to vary the temperature and/or pressure of the source gas and the absorption solution, while the condenser receives a gas from the gas absorption vessel (1) to vary the temperature and/or pressure of the gas. In the gas absorption vessel (1), the absorption solution containing liquefied N 2 O 4 may be applied to the source gas containing NO, so that NO is absorbed in the absorption solution. Then the absorption solution is heated and/or depressurized to generate an intermediate gas containing a relatively large amount of NO and a smaller amount of NO 2 from the absorption solution. In the condenser (6), the intermediate gas is cooled and/or pressurized to give condensed N 2 O 3 and/or condensed N 2 O 4 . |
