Promotion of premixed charge compression ignition combustion fueled by natural gas based on selective and heterogeneous recirculation of nitrogen oxides

基于氮氧化物选择性非均相再循环的天然气预混压燃燃烧推广

• 批准号: 24760172
• 负责人: KAWASAKI Kiyoshi
• 金额: $ 2.91万
• 依托单位: The University of Shiga Prefecture
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24760172/
• 关键词: 予混合圧縮着火機関; 天然ガス; 窒素酸化物; 予混合; 触媒; 燃焼

(1) The behavior of autoignition and combustion were investigated through indicator diagram and combustion visualization on a rapid compression and expansion machine when nitrogen oxides were inducted into a premixture heterogeneously. The obtained results show that higher sensitizing effect is obtained from nitrogen oxides unevenly distributed compared to that homogeneously distributed because the existence of local spots with high NOx concentrations can assist autoignition effectively.(2) We proposed the selective recirculation of NOx in burnt gas by using NOx absorption catalyst. The feasibility of proposed technique in which absorbed NO was regenerated using a fuel as a reductant was investigated on a small reactor with NOx absorption catalyst for commercial vehicles. The effect of reaction temperature and chemical spices of reductant were investigated in regeneration process. As a result, 25% of NO absorbed on a catalyst was able to be regenerated.

(1)通过指示图和燃烧可视化，研究了氮氧化物非均相引入预混物时在快速压缩膨胀机上的自燃和燃烧行为。结果表明，与均匀分布的氮氧化物相比，不均匀分布的氮氧化物具有更高的敏化效果，因为局部高NOx浓度点的存在可以有效地辅助自燃。(2)提出了利用NOx吸收催化剂对已燃气体中的NOx进行选择性再循环。使用燃料作为还原剂再生所吸收的 NO 的技术的可行性在带有商用车辆 NOx 吸收催化剂的小型反应器上进行了研究。考察了反应温度和还原剂化学香料对再生过程的影响。结果，吸附在催化剂上的 NO 的 25% 得以再生。

项目成果

NOx吸蔵触媒を用いた排気中の窒素酸化物の選択的吸収・再生

利用NOx存储催化剂选择性吸收和再生废气中的氮氧化物

• 发表时间: 2014
• 作者: 志村祐康;店橋護;宮内敏雄;犬飼祐輔,河崎澄,山根浩二,近藤千尋
• 通讯作者: 犬飼祐輔,河崎澄,山根浩二,近藤千尋

窒素酸化物の不均一導入による天然ガスHCCI燃焼の促進

氮氧化物非均相引入促进天然气 HCCI 燃烧

• 发表时间: 2012
• 作者: 迫田直也;河野正道;高田保之;山崎由大，野口雄平，藤原直人，金子成彦;久保聡一朗，河崎澄，近藤千尋，山根浩二
• 通讯作者: 久保聡一朗，河崎澄，近藤千尋，山根浩二