| 摘要 |
PROBLEM TO BE SOLVED: To improve an extraction ratio to a relatively low-concentration NOx gas.SOLUTION: A denitration method of a processed gas containing NOx comprises a step of carrying out ozone oxidation of NOx which is a processed gas component in the processed gas, and of carrying out absorption removal of a remaining NOx component in the processed gas after the ozone oxidation by an absorbing liquid. In the method, a denitration method of the processed gas containing NOx, in which ozone is added to both of the processed gas and the absorbing liquid, is provided. A molar ratio to ozone supplied to the processed gas is to be within a range from 0.1 to twice, and ozone of 1 ppm or more and of a saturated concentration or less is to be in advance added to the absorbing liquid. |
