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吸附還原降低柴油機(jī)NOx和PM的微觀反應(yīng)動(dòng)力學(xué)計(jì)算
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國(guó)家自然科學(xué)基金資助項(xiàng)目（50776062）、國(guó)家高技術(shù)研究發(fā)展計(jì)劃（863計(jì)劃）資助項(xiàng)目（2008AA06Z322）和天津市應(yīng)用基礎(chǔ)與前沿技術(shù)研究計(jì)劃重點(diǎn)項(xiàng)目（11JC2DJC23200）


Micro-reaction Kinetics Calculation for Reducing Diesel NOx and PM by Adsorber-reduction Catalyst
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    摘要:

    以BaO(s1)為第1吸附位，Pt (s2)為第2吸附位，采用Chekmin軟件對(duì)吸附還原脫除柴油機(jī)NOx和PM的微觀反應(yīng)動(dòng)力學(xué)過(guò)程進(jìn)行了模擬計(jì)算，結(jié)果表明：稀燃階段氣相NO(g)、NO2(g)以NO2(s1)、NO2NO3(s1)、NO3(s1)形式儲(chǔ)存在BaO表面；濃燃階段NOx中的N原子相互結(jié)合，形成的N2分子被脫附，C(S)與活性氧O*進(jìn)行表面反應(yīng)。稀燃運(yùn)行時(shí)間和比值大小、發(fā)動(dòng)機(jī)排溫及排氣中氧濃度對(duì)NOx和PM的去除有較大影響。

    Abstract:

    BaO(s1) was used as the first adsorption sites, and Pt (s2) was used as the second adsorption site, the micro-reaction kinetics simulation of NOx and PM in diesel engine by adsorber-reduction catalyst was calculated with the software of Chekmin. The results showed that in lean burn condition, gas phase NO(g), NO2(g) were stored in forms of NO2 (s1), NO2NO3 (s1), and NO3 (s1) on the surface of BaO, but in rich burn condition, N atoms in NOx desorption from surface of BaO combined with each other to form N2 molecular. Surface reaction was occurred between C (S) and reactive oxygen species O*. The absolute time, the ratio values of lean burn condition, exhaust temperature and oxygen concentration in diesel engine exhaust pipe have a great impact on removal of NOx and PM emission.

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陳朝輝,李志軍,焦鵬昊,高立波,張文斐,劉磊.吸附還原降低柴油機(jī)NOx和PM的微觀反應(yīng)動(dòng)力學(xué)計(jì)算[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2011,42(7):10-15. Chen Zhaohui, Li Zhijun, Jiao Penghao, Gao Libo, Zhang Wenfei, Liu Lei. Micro-reaction Kinetics Calculation for Reducing Diesel NOx and PM by Adsorber-reduction Catalyst[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(7):10-15.

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