| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inexpensive treatment method for nitrogen oxide in the polluted atmosphere, constituted so as to reduce the restriction of an installation place and having safety, high efficiency and good operability at the normal temperature, and a treatment apparatus therefor. <P>SOLUTION: In this treatment method for the nitrogen oxide-containing gas, the nitrogen oxide-containing gas to be treated is treated with low temperature plasma to convert nitrogen monoxide to nitrogen dioxide, and this nitrogen dioxide and nitrogen oxide contained in the gas to be treated from the beginning are brought into contact with a nitrite aqueous solution or a thiosulfate aqueous solution to be converted to a nitrogen gas. The treatment apparatus 10 includes a high pressure discharge chamber 1 capable of generating the low temperature plasma, a means 8a for supplying the nitrogen oxide-containing gas to be treated to the high pressure discharge chamber, a reducing treatment chamber 2 having a sulfite or thiosulfate aqueous solution tank 22, a transfer means 8b for transferring the plasma treated gas treated in the high pressure discharge chamber to the reducing treatment chamber, the gas discharge pipe 23 communicating with the transfer means 8b and provided to the bottom part of the sulfite or thiosulfate aqueous solution tank 22, and an exhaust means 8c for the treated gas from the reducing treatment. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
