High concentration NOx, SOx and particulate removal system using the plasma-chemical hybrid process

采用等离子化学混合工艺的高浓度 NOx、SOx 和颗粒物去除系统

• 批准号: 17310050
• 负责人: YAMAMOTO Toshiaki
• 金额: $ 9.41万
• 依托单位: Osaka Prefecture University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17310050/
• 关键词: Environmental protection; Plasma; NOx; SOx; Concentration; Air pollutant; 非平衡プラズマ; 排ガス処理; プラズマ複合プロセス; リモートプラスマ

The objective of the research is to remove high concentration (1,000〜2,000ppm) NOx and SOx at high flue gas gas temperature (>250℃), and also to remove particulate matters (PM) from diesel engine and boiler emission. The adsorption and plasma hybrid process were employed to control the diesel emission and the plasma chemical hybrid process was employed to control the boiler emission. In the dry process for diesel emission control, the adsorbent using molecular shieve (MS-13X) was used to adsorb NOx effectively, and adsorbed NOx were desorbed and regenerated using N2 by means of heat in the diesel emission system. The desorbed high concentrated NOx were totally reduced by the nonthermal plasma to form N_2 and O_2. Since the moisture content in the diesel engine was affected by NOx adsorption process, the use of silicate was investigated. As the results, the use of silicate was to place upstream of the adsorbent.(or high temperature side). Other hydrophobic adsorbent such as Mn based ads … More orbent was also found to be extremely suited for NOx adsorption. We also found that NOx desorption by heat took place effectively even at 120℃ and NOx concentration was increased with repetitive thermal desorption and reached a constant desorption efficiency beyond 7 repetitive desorption process. As far as PM is concerned, PM was trapped with the conventional diesel particulate filter (DPF) and incinerated with either NO_2 at the gas temperature of 250℃ and O_3.even at the room temperature.On the other hand, the plasma chemical process used for boiler emission control, ozpnizer was used to oxidize NO to form NO_2 in the gas stream and formed NO_2 was reduced by the chemical scrubber using Na_2SO_3 solution to achieve N_2 and water soluble and nontoxic Na_2SO_4. The required amount of O_3 was approximately one stoichiometric of NO concentration in the gas stream. The NOx reduction was affected by CO_2 and O_2 concentrations in the gas stream and the optimization study was performed, resulting that more that 85% of NOx reduction was achieved throughout the experiments. Less

研究的目的是在高烟气温度(&gt；250℃)下脱除高浓度(1000~2000ppm)的NOx和SOx，并脱除柴油机和锅炉排放的颗粒物(PM)。采用吸附和等离子体混合工艺控制柴油机排放，采用等离子体化学混合工艺控制锅炉排放。在干法柴油机排放控制中，采用分子筛(MS-13X)吸附剂对NOx进行有效吸附，并在柴油机排放系统中利用氮气对吸附后的NOx进行解吸和再生。解吸后的高浓度NOx被低温等离子体完全还原为N_2和O_2。由于柴油机中的水分受NOx吸附过程的影响，因此对硅酸盐的利用进行了研究。结果表明，硅酸盐的使用是放置在吸附剂的上游(或高温侧)。其他疏水吸附剂，如锰基ADS…更多的脱氧剂也被发现非常适合于NOx的吸附。我们还发现，即使在120℃时，NOx也可以有效地进行热解吸，重复热解吸可以增加NOx的浓度，并在重复解吸7次后达到恒定的解吸效率。对于PM来说，PM被传统的柴油微粒过滤器捕获，并在250℃的气体温度下和O_3一起焚烧，即使在室温下也是如此。另一方面，用于锅炉排放控制的等离子体化学过程，利用臭氧发生器氧化气流中的NO生成NO2，并通过Na2SO3溶液通过化学洗涤器还原生成NO2，得到N_2和水溶性无毒的Na_2SO_4。研究了气流中CO_2和O_2浓度对NOx脱除效果的影响，并进行了优化研究，整个实验过程中脱氮率达到了85%以上。较少

项目成果

窒素非熱プラズマを用いたNO_x還元と吸着剤の再生-ディーゼルエンジン排出ガス処理を目的とした各種反応器の性能比較-

氮气低温等离子体NO_x还原及吸附剂再生-柴油机废气处理各种反应器性能比较-

• 发表时间: 2006
• 期刊: 静電気学会誌 30・6
• 作者: M.Takemoto;S.Yajima;Y.Kodama;Y.Tanaka;A.Chiba;T.Fukao;吉田 恵一郎
• 通讯作者: 吉田 恵一郎

NOx reduction and Regeneration of Adsorbent Using N2 Nonthermal Plasma.

使用 N2 非热等离子体进行 NOx 还原和吸附剂再生。

• 发表时间: 2006
• 期刊: Journal of the Institute of Electrostatics Japan Vol.30, No.6
• 作者: Yoshida;K;M.Okubo;T.Kuroki;T.Yamamoto
• 通讯作者: T.Yamamoto

間接プラズマ・化学複合プロセスを用いたNO_x処理技術(空気活性ガス注入方式と直接酸化方式の比較)

间接等离子体/化学联合工艺NO_x处理技术（空气活性气体喷射法与直接氧化法比较）

• 发表时间: 2005
• 期刊: 日本機械学会論文集(B編) 71・711
• 作者: Yamamoto;T.;M.Okubo et al.;吉田 恵一郎;Ari Furuya;大久保 雅章;Kazuya Inoue;M.Okubo;藤島英勝
• 通讯作者: 藤島英勝

Numerical Simulation on Nonthermal Plasma Induced by a Nanosecond Pulsed Barrier Discharge.

纳秒脉冲势垒放电引起的非热等离子体的数值模拟。

• 发表时间: 2005
• 期刊: Proc.of Second International Conference on Flow Dynamics (21st Century COE Program) (CD-ROM)
• 作者: Okubo;M.;T.Yamamoto
• 通讯作者: T.Yamamoto

NOx Removal Using Indirect Plasma Oxidation and Chemical Hybrid Process (Comparison of Air Radical Injection with Direct Oxidation)

使用间接等离子体氧化和化学混合工艺去除氮氧化物（空气自由基喷射与直接氧化的比较）

• 发表时间: 2005
• 期刊: Trans.JSME (Series B) (in Japanese) 71-711
• 作者: H.Fujishima;S.Haruna;T.Kuroki;M.Okubo;T.Yamamoto
• 通讯作者: T.Yamamoto