title: Diesel NO(x) aftertreatment by combined process using temperature swing adsorption, NO(x) reduction by nonthermal plasma, and NO(x) recirculation: improvement of the recirculation process.
abstract: NO(x) emitted from a stationary diesel engine generator was treated with a hybrid system comprising NO(x) reduction by nonthermal plasma (NTP) and temperature swing adsorption (TSA) driven by engine waste heat. TSA produces a low-volume gas mixture of N(2) and highly concentrated NO(x), which is effectively reduced by NTP treatment. Improved treatment performance and efficiency are achieved by re-injecting the NTP-treated gas mixture into the engine intake. The system comprises two switchable adsorption chambers; the operation of this system was simulated by using a one-chamber system. The maximum energy efficiency for NO(x) treatment is 200 g(NO(2))/kWh. The respective contributions of NTP and injection of N(2) and NO(x) to the performance were theoretically analyzed. The analysis predicts that high energy efficiency and high NO(x)-removal efficiency can be simultaneously achieved with this system but miniaturization of the adsorption chambers will be a challenge.
authors: Department of Electrical and Electronic Systems Engineering, Osaka Institute of Technology, 5-16-1, Omiya, Osaka 535-8585, Japan. k.yoshida@ee.oit.ac.jp
authors: Keiichiro
authors: K
authors: Yoshida
authors: Takuya
authors: T
authors: Kuwahara
authors: Tomoyuki
authors: T
authors: Kuroki
authors: Masaaki
authors: M
authors: Okubo
mesh_terms: D000327:Adsorption; D000397:Air Pollution / Q000517:prevention & control*; D004867:Equipment Design; D006358:Hot Temperature; D009589:Nitrogen Oxides / Q000737:chemistry*; D001335:Vehicle Emissions
chemical_list: D009589:Nitrogen Oxides; D001335:Vehicle Emissions