Design of Decomposition System of Toxic Substances in Exhaust Gases by Microwave-induced Plasma under Atmospheric Pressure

大气压下微波诱导等离子体分解废气中有毒物质系统设计

• 批准号: 13555221
• 负责人: SHIMIZU Yasuhiro
• 金额: $ 8.96万
• 依托单位: Nagasaki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13555221/
• 关键词: Microwave-induced Plasma; Porous SiC Ceramics; Nonthermal Plasma inLiquid Phase; Nonthermal Plasma in Gas Phase; Diesel Particulate Matters; NO_x; Treatment of Exhaust Gases; Purification of Environmental Pollutants; 大気圧プラズマ; 水中プラズマ; β-ナフトール; S

The following three subjects have been mainly studied in this project, and the results obtained are summarized below.1) Control of Microwave-induced Plasma in Liquid Phase and Decomposition of Organic CompoundsBehavior of microwave-induced plasmas generated from various ceramic triggers in pure water, dichloroacetic acid (DCAA) and β-naphthol aqueous solution and their abilities for decomposing these organic compounds have been investigated. The use of SiC ceramics or carbon block as a trigger in liquid phase resulted in formation of gaseous CO_2 due to partial decomposition of the trigger itself. In the case of decomposition of DCAA, La_<0.8>Sr_<0.2>CoO_3 was found to be the most suitable trigger from the viewpoints of conversion of DCAA, amounts of partial decomposition products and long-term stability as a trigger. In the case of decomposition of β-naphthol, however, FeSi was superior to other triggers, being accompanied with high ability for decomposing β-naphthol and excellent sta … More bility in liquid phase.2) Control of Microwave-induced N_2 Plasma under Atmospheric Pressure from Various Porous Ceramic Triggers and Improvement of Ability for Decomposing Dioxin-related CompoundsBehavior of microwave-induced plasmas generated from various porous ceramic triggers in Ar and N_2 gas flowing and their ability for decomposing monochlorobenzene (MCB) have been investigated. Stable nonthermal plasma could be generated from all the triggers tested in Ar flowing. However, stable plasma could be generated in N_2 flowing only when porous SIC ceramics was employed as a trigger and MCB in N_2 flowing could be decomposed almost completely under the conditions. Therefore, porous ceramics was found to be most suitable structure used as a trigger in gas phase.3)Improvement of Efficiency for Simultaneous Removal of NO_x and Diesel Particulate Matters by Microwave-induced PlasmaOxidation behavior of diesel particulate matters (DPM) and gas composition have been investigated as a function of microwave power irradiated to DPM-loaded porous SiC ceramics under 0.1% NO -10% O_2 -N_2 flowing. Additional effort has been directed to study the NO_x removal behavior by 1.0 wt% Ir/TiO_2 catalyst placed downstream from the plasma region. The amount of NO_x, formed in the downstream of the plasma region decreased markedly with increasing the microwave power, while the amounts of CO, CO_2 and H2 increased. No NO_x was detected in the effluent gas after the catalyst bet. Thus, draping of DPM by a SiC filter as well as NO, storage by suitable catalysts in the downstream and periodical irradiation of microwave to the filter are considered to be useful for simultaneous reduction of DPM and NO_x contained in the exhaust gas from diesel engine. Less

以下三个受试者在该项目中主要是研究的，并且在下面总结了所获得的结果。1）控制微波诱导的血浆在液相中的血浆和微波诱导的等离子体的分解，这些等离子体是由微波诱导的等离子体产生的，这些等离子体是由纯水中的各种陶瓷触发物在各种陶瓷中产生的，二氯酸的（dcaa）和二氯酸（DCAA）的液体，并将其固定型含量分配给β-Napherocecip-n-Naphapapheroce- spiquastecipβ-纽扣。已经研究了化合物。在液相中使用SIC陶瓷或碳块作为触发器，导致气体CO_2由于触发本身的部分分解而形成了气态CO_2。在DCAA分解的情况下，LA_ <0.8> SR_ <0.2> COO_3被发现是最合适的触发器，从DCAA的转换的角度来看，部分分解产物和长期稳定性作为触发。然而，在β-萘二硫醇分解的情况下，FESI优于其他触发因素，伴随着高能力分解β-萘二酚和出色的STA……在液相中更灵活。2）控制微波诱导的N_2质量降低，在各种多孔陶瓷触发器的能力下，Decounce decounce to decounce to decounce to decounce in for decounce in for decounce topersic。已经研究了由AR和N_2气体流动的各种多孔陶瓷触发器产生的微波诱导的等离子体以及它们分解单氯苯（MCB）的能力。可以从AR流动测试的所有触发器中产生稳定的非热等离子体。但是，只有在使用多孔SIC陶瓷作为触发器时，才能在N_2中产生稳定的等离子体，而在N_2流动中的MCB几乎可以在条件下几乎完全分解。因此，发现多孔陶瓷是在气期间用作扳机的最合适的结构。3）提高效率，通过微波诱导的柴油颗粒物（DPM）和气体组成的dpm-potived po perified-prodiped po prodifed potified potif potif prodif potif potif potif potif potif potif prodife potif prodife potic prodife potif prodife potic prodife potic prodife potif prodife potif potified dpm- O_2 -N_2流动。已指示额外的努力研究了1.0 wt％IR/TIO_2催化剂从血浆区域下游。在血浆区域下游形成的NO_X的量随着微波功率的增加而显着减少，而CO，CO_2和H2的量增加。催化剂下注后，在有效气体中未检测到NO_X。这是通过SIC过滤器以及NO将DPM悬挂在下游中的合适催化剂的存储，并定期将微波炉辐射为过滤器，可用于简单地降低DPM的DPM，而NO_X中包含在柴油发动机的废气中。较少的

项目成果

Y.Shimizu: "Decomposition of Toxic Halogenated Hydrocarbons by Microwave-induced Ar Plasma Generated from SiC Ceramics under Atmospheric Pressure"Electrochemistry. Vol.69, No.7. 508-515 (2001)

Y.Shimizu：“大气压下SiC陶瓷产生的微波诱导Ar等离子体分解有毒卤代烃”电化学。

Y.Shimizu: "Decomposition of Toxic Halogenated Hydrocarbons by Microwave-induced Ar Plasma Generated from SiC Ceramics under Atmospheric Pressure"Electrochemistry. Vol. 69 No. 7. 508-515 (2001)

Y.Shimizu：“大气压下SiC陶瓷产生的微波诱导Ar等离子体分解有毒卤代烃”电化学。

Y.Shimizu: "Decomposition of Chlorinated Aromatics by Microwave-induced Ar plasma Generated using SiC Ceramic Trigger under Atmospheric Pressure"Electrochemistry. Vol.71, No.10. 960-965 (2003)

Y.Shimizu：“在大气压下使用 SiC 陶瓷触发器产生的微波诱导 Ar 等离子体分解氯化芳烃”电化学。

Y.Shimizu: "Decomposition of Organic Compounds by Microwave-induced Plasma in Liquid Phase"Electrochemistry. Vol. 72 No. 2. 92-97 (2004)

Y.Shimizu：“液相中微波诱导等离子体分解有机化合物”电化学。

Y.Shimizu: "Decomposition of Chlorinated Aromatics by Microwave-induced Ar Plasma Generated using SiC Ceramic Trigger under Atmospheric Pressure"Electrochemistry. Vol. 71 No. 10. 960-965 (2003)

Y.Shimizu：“在大气压下使用 SiC 陶瓷触发器产生的微波诱导 Ar 等离子体分解氯化芳烃”电化学。