| 摘要 |
The present invention provides an exhaust gas treatment method and an exhaust gas treatment apparatus, each of which is capable of efficiently removing NOx in an exhaust gas. An exhaust gas treatment method according to the present invention is characterized by comprising a step for treating an exhaust gas by supplying ozone and a powder containing an alkaline agent into an exhaust gas that contains NOx, and is also characterized in that NO is oxidized into NO2 by ozone, and a gas-solid reaction of NO2 with the alkaline agent or a thermal decomposition product thereof is caused. In addition, an exhaust gas treatment apparatus according to the present invention is characterized by comprising an exhaust gas channel through which an exhaust gas that contains NOx passes, an ozone supply part which supplies ozone into the exhaust gas passing through the exhaust gas channel, and an alkaline agent supply part which supplies a powder that contains an alkaline agent into the exhaust gas passing through the exhaust gas channel. This exhaust gas treatment apparatus is also characterized in that: the ozone supply part is provided so that NO in the exhaust gas is oxidized into NO2 by the supplied ozone; and the alkaline agent supply part is provided so as to cause a gas-solid reaction of NO2 with the alkaline agent contained in the supplied powder or a thermal decomposition product of the alkaline agent. |
