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

研究目的是在高烟气温度（>250℃）下去除高浓度（1,000-2,000ppm）NOx和SOx，同时去除柴油机和锅炉排放的颗粒物（PM）。采用等离子体混合工艺控制柴油排放，采用等离子体化学混合工艺控制锅炉排放。在柴油排放控制干法中，吸附剂采用分子筛。采用MS-13X对NOx进行有效吸附，利用柴油机排放系统中的热量将吸附的NOx脱附并再生，脱附的高浓​​度NOx被低温等离子体完全还原，形成N_2和O_2。由于柴油机中的水分含量受NOx吸附过程的影响，因此对硅酸盐的使用进行了研究，结果表明硅酸盐的使用应置于柴油机的上游。其他疏水性吸附剂，如锰基吸附剂，也被发现非常适合 NOx 吸附。我们还发现，即使在 120℃ 下，NOx 的热脱附也能有效进行，并且 NOx 浓度为随着重复热脱附的进行而增加，并达到超过7次重复脱附过程的恒定脱附效率就PM而言，PM被传统的柴油颗粒过滤器（DPF）捕获并被NO_2焚烧。气体温度为250℃，O_3，甚至在室温下。另一方面，用于锅炉排放控制的等离子化学工艺，采用臭氧发生器将气流中的NO氧化成NO_2，形成的NO_2被还原化学洗涤器使用Na_2SO_3溶液来获得N_2和水溶性且无毒的Na_2SO_4，所需的O_3量大约是NO浓度的一个化学计量。气流中的CO_2和O_2浓度影响NOx的减少，并进行了优化研究，结果在整个实验中实现了85％以上的NOx减少。

项目成果

Three-dimensional EHD Simulation for Point Corona Electrostatic Precipitator Based on Laminar and Turbulent Models

基于层流和湍流模型的点电晕静电除尘器三维EHD仿真

• 发表时间: 2006
• 作者: Yamamoto; T.; Y.Morita; H.Fujishima; M.Okubo
• 通讯作者: M.Okubo

プラズマ複合プロセスに基づくディーゼル排気微粒子・NOxの浄化技術

基于等离子体复合工艺的柴油机尾气颗粒物及NOx净化技术

• 发表时间: 2006
• 作者: 大久保 雅章

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
• 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
• 作者: Okubo; M.; 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NOx処理技術(空気活性ガス注入方式と直接酸化方式の比較)

采用间接等离子体/化学联合工艺的NOx处理技术（空气活性气体喷射法与直接氧化法的比较）

• 发表时间: 2005
• 作者: 藤島英勝