Diesel NO_x aftertreatment by combined process using temperature swing adsorption, nonthermal plasma, and NO_x recirculation: NO_x removal accelerated by conversion of NO to NO₂

详细信息    查看全文

• 作者：Keiichiro Yoshida
• 关键词：Nonthermal plasma ; Temperature swing adsorption (TSA) ; NOx ; Diesel ; Exhaust gas ; Oxidation catalyst
• 刊名：Journal of the Taiwan Institute of Chemical Engineers
• 出版年：November, 2013
• 年：2013
• 卷：44
• 期：6
• 页码：1054-1059
• 全文大小：1556 K

文摘

NO_x emitted from a stationary diesel engine generator was treated with a hybrid system that achieves NO_x reduction by means of nonthermal plasma (NTP) and temperature swing adsorption (TSA) driven by engine waste heat. TSA produces a low-volume gas mixture of N₂ and highly concentrated NO_x, which is effectively reduced by NTP treatment. The performance of NO_x treatment is enhanced by the re-injection of the concentrated NO_x into the engine intake. In this study, in particular, an oxidation catalyst was placed before the adsorber to enhance the adsorption of NO_x by converting NO to NO₂, with the aim of achieving a higher removal efficiency with a low adsorbent volume. The results show that it is possible for the treatment system to be downsized using the oxidation catalyst. The system's energy efficiency (the ratio of the amount of NO_x to the input electrical energy) ranges from 260 to 304 g(NO₂)/kWh.