| US 7,521,031 B2 | ||
| Method and apparatus for treating exhaust gas | ||
| Masaaki Okubo, Sakai (Japan); Toshiaki Yamamoto, Sakai (Japan); and Tomoyuki Kuroki, Sakai (Japan) | ||
| Assigned to Osaka Industrial Promotion Organization, Osaka (Japan) | ||
| Appl. No. 10/576,369 PCT Filed Oct. 06, 2004, PCT No. PCT/JP2004/014737 § 371(c)(1), (2), (4) Date Apr. 19, 2006, PCT Pub. No. WO2005/037412, PCT Pub. Date Apr. 28, 2005. |
||
| Claims priority of application No. 2003-361010 (JP), filed on Oct. 21, 2003. | ||
| Prior Publication US 2007/0071657 A1, Mar. 29, 2007 | ||
| Int. Cl. B01D 53/46 (2006.01); B01D 53/50 (2006.01); B01D 53/56 (2006.01); B01D 53/62 (2006.01); B01D 53/72 (2006.01); B01D 53/74 (2006.01); B01D 53/75 (2006.01); B01D 53/92 (2006.01); B01J 19/08 (2006.01); G05D 21/00 (2006.01) | ||
| U.S. Cl. 423—210 [423/213.2; 423/213.7; 423/220; 423/230; 423/235; 423/239.1; 423/242.1; 423/245.3; 423/246; 423/247; 422/105; 422/168; 422/169; 422/170; 422/177; 422/178; 422/180; 422/186.04; 422/186.21; 204/164; 204/179] | 19 Claims |
| 1. A method for treating exhaust gas using a first plasma reactor and a second plasma reactor that are operationally connected
in series along an exhaust gas line,
the method comprising:
a first step of adsorbing target components including NOx in the exhaust gas with an adsorbent,
introducing a nitrogen gas with an oxygen concentration of 10 vol % or less and a purity of 90 vol % or more into the adsorbent,
and
applying first nonthermal plasma of the nitrogen gas to the adsorbent by generating an electric discharge, thus causing desorption
of the target components and regeneration of the adsorbent; and
a second step of reducing NOx to N2 by further applying second nonthermal plasma to the target components desorbed by the first nonthermal plasma,
wherein the first step is performed in the first plasma reactor, and the second step is performed in the second plasma reactor,
the second plasma reactor following or being integrated with the first plasma reactor.
|