氧化型催化器载体长度对柴油机排放性能的影响
|
摘要
基于轻型柴油机台架试验平台,研究柴油机氧化型催化转化器(DOC)载体长度变化对后处理系统减排性能的影响.结果表明:适当增大DOC载体长度可提高对一氧化碳(CO)、总碳氢化合物(THC)和一氧化氮(NO)的氧化率,过量增大对氧化性能的提升有限,同时影响DOC在低温低负荷下减排效果;DOC耦合催化型柴油机颗粒捕集器(CDPF)对颗粒物数量(PN)的减排效果受DOC载体长度影响较小.从兼顾成本与性能的角度出发,适当增大DOC载体长度能有效提高减排效果,但过量增大对减排效果提升影响不大.
Based on light-duty diesel engine bench test platform, the effect of the length of diesel oxidation catalyst's(DOC) carrier on the emission reduction performance of aftertreatment system was studied. The results show that, increasing the length of the DOC's carrier can increase the oxidation rate of carbon monoxide(CO), total hydrocarbons(THC) and nitric oxide(NO). However, excessive increase in the length of the DOC carrier has limited improvement on the oxidation performance and will reduce the emission reduction effect of DOC under low temperature and low load. The reduction rate of DOC coupled catalyzed diesel particulate filter(CDPF) on particle number(PN) is less affected by the length of the DOC carrier. From the perspective of balancing cost and performance, appropriately increasing the length of the DOC carrier can effectively improve the emission reduction effect, but the excessive increase has little effect on the improvement of emission reduction effect.
Based on light-duty diesel engine bench test platform, the effect of the length of diesel oxidation catalyst's(DOC) carrier on the emission reduction performance of aftertreatment system was studied. The results show that, increasing the length of the DOC's carrier can increase the oxidation rate of carbon monoxide(CO), total hydrocarbons(THC) and nitric oxide(NO). However, excessive increase in the length of the DOC carrier has limited improvement on the oxidation performance and will reduce the emission reduction effect of DOC under low temperature and low load. The reduction rate of DOC coupled catalyzed diesel particulate filter(CDPF) on particle number(PN) is less affected by the length of the DOC carrier. From the perspective of balancing cost and performance, appropriately increasing the length of the DOC carrier can effectively improve the emission reduction effect, but the excessive increase has little effect on the improvement of emission reduction effect.
引文
[1] 中华人民共和国生态环境部.轻型汽车污染物排放限值及测量方法(中国第五阶段)[M].北京:中国环境科学出版社,2013.Ministry of Ecology and Environment of the People’s Republic of China.Limits and measurement methods for emissions from light-duty vehicles (China 5)[M].Beijing:China Environmental Science Press,2013.
[2] 温溢,纪亮,刘宪,等.国五国六工况下轻型车排放特性研究[J].环境科学与技术,2016(增刊2):50.WEN Yi,JI Liang,LIU Xian,et al.A study on emission characteristics in China 5 and China 6 driving cycles for light-duty vehicle[J].Environmental Science & Technology,2016(S2):50.
[3] RAMADAS S,SUSEELAN S P,PARAMADHAYALAN T,et al.Optimization of diesel oxidation catalyst (DOC) on passenger cars to improve emission robustness[R].Detroit:SAE,2015.
[4] 葛蕴珊,赵伟,王军方,等.DOC对柴油机排放特性影响的研究[J].北京理工大学学报,2012,32(5):460.GE Yunshan,ZHAO Wei,WANG Junfang,et al.Effects of diesel oxidation catalyst on emission from diesel[J].Transactions of Beijing Institute of Technology,2012,32(5):460.
[5] 楼狄明,刘影,谭丕强,等.DOC/DOC+CDPF对重型柴油车气态物排放的影响[J].汽车技术,2016(10):22.LOU Diming,LIU Ying,TAN Piqiang,et al.The influences of DOC and DOC+CDPF on gaseous emissions of heavy-duty diesel vehicle[J].Automobile Technology,2016(10):22.
[6] 孟忠伟,张川,李路,等.DOC对柴油机颗粒物排放影响的试验研究[J].内燃机工程,2017,38(2):67.MENG Zhongwei,ZHANG Chuan,LI Lu,et al.Experimental investigation on the influence of DOC on diesel engine particle emission[J].Chinese Internal Combustion Engine Engineering,2017,38(2):67.
[7] LEFORT I,TSOLAKIS A.A thermally efficient DOC configuration to improve CO and THC conversion efficiency[R].Detroit:SAE,2013.
[8] SOUTHWARD B W L,BASSO S,PFEIFER M.On the development of low PGM content direct soot combustion catalysts for diesel particulate filters[R].Detroit:SAE,2010.
[9] V?LIHEIKKI A,K?RKK?INEN M,HONKANEN M,et al.Deactivation of Pt/SiO2-ZrO2 diesel oxidation catalysts by sulphur,phosphorus and their combinations[J].Applied Catalysis B:Environmental,2017,218:409.
[10] KOLLI T,KANERVA T,HUUHTANEN M,et al.The activity of Pt/Al2O3 diesel oxidation catalyst after sulphur and calcium treatments[J].Catalysis Today,2010,154(3):303.
[11] SHARMA H,MHADESHWAR A.A detailed micro kinetic model for diesel engine emissions oxidation on platinum-based diesel oxidation catalysts (DOC)[J].Applied Catalysis B:Environmental,2012,127:190.
[12] CHATTERJEE D,BURKHARDT T,RAPPE T,et al.Numerical simulation of DOC+DPF+SCR systems:DOC influence on SCR performance[J].SAE International Journal of Fuels & Lubricants,2009,1(1):440.
[13] 楼狄明,张斌,谭丕强,等.车用柴油机氧化催化转化器仿真模拟与试验分析[J].内燃机,2008(4):30.LOU Diming,ZHANG Bin,TAN Piqiang,et al.Simulation and experimental analysis of diesel oxidation catalyst in the automobile diesel engine[J].Internal Combustion Engines,2008(4):30.
[14] 向立明,谭金龙.车用柴油机氧化催化转化器仿真分析[J].内燃机,2014(2):48.XIANG Liming,TAN Jinlong.Simulation analysis of diesel oxidation catalyst in the automobile diesel engine[J].Internal Combustion Engines,2014(2):48.
[15] HERREROS J M,TSOLAKIS A.Reduction of low temperature engine pollutants by understanding the exhaust species interactions in a diesel oxidation catalyst [J].Environmental Science & Technology,2014,48(4):2361.
[16] KATARE S R,PATTERSON J E,LAING P M.Aged DOC is a net consumer of NO2:analyses of vehicle,engine-dynamometer and reactor data[R].Detroit:SAE,2007.
[17] AL-HARBI M,HAYES R,VOTSMEIER M,et al.Competitive NO,CO and hydrocarbon oxidation reactions over a diesel oxidation catalyst[J].Canadian Journal of Chemical Engineering,2012,90(6):1527.
[2] 温溢,纪亮,刘宪,等.国五国六工况下轻型车排放特性研究[J].环境科学与技术,2016(增刊2):50.WEN Yi,JI Liang,LIU Xian,et al.A study on emission characteristics in China 5 and China 6 driving cycles for light-duty vehicle[J].Environmental Science & Technology,2016(S2):50.
[3] RAMADAS S,SUSEELAN S P,PARAMADHAYALAN T,et al.Optimization of diesel oxidation catalyst (DOC) on passenger cars to improve emission robustness[R].Detroit:SAE,2015.
[4] 葛蕴珊,赵伟,王军方,等.DOC对柴油机排放特性影响的研究[J].北京理工大学学报,2012,32(5):460.GE Yunshan,ZHAO Wei,WANG Junfang,et al.Effects of diesel oxidation catalyst on emission from diesel[J].Transactions of Beijing Institute of Technology,2012,32(5):460.
[5] 楼狄明,刘影,谭丕强,等.DOC/DOC+CDPF对重型柴油车气态物排放的影响[J].汽车技术,2016(10):22.LOU Diming,LIU Ying,TAN Piqiang,et al.The influences of DOC and DOC+CDPF on gaseous emissions of heavy-duty diesel vehicle[J].Automobile Technology,2016(10):22.
[6] 孟忠伟,张川,李路,等.DOC对柴油机颗粒物排放影响的试验研究[J].内燃机工程,2017,38(2):67.MENG Zhongwei,ZHANG Chuan,LI Lu,et al.Experimental investigation on the influence of DOC on diesel engine particle emission[J].Chinese Internal Combustion Engine Engineering,2017,38(2):67.
[7] LEFORT I,TSOLAKIS A.A thermally efficient DOC configuration to improve CO and THC conversion efficiency[R].Detroit:SAE,2013.
[8] SOUTHWARD B W L,BASSO S,PFEIFER M.On the development of low PGM content direct soot combustion catalysts for diesel particulate filters[R].Detroit:SAE,2010.
[9] V?LIHEIKKI A,K?RKK?INEN M,HONKANEN M,et al.Deactivation of Pt/SiO2-ZrO2 diesel oxidation catalysts by sulphur,phosphorus and their combinations[J].Applied Catalysis B:Environmental,2017,218:409.
[10] KOLLI T,KANERVA T,HUUHTANEN M,et al.The activity of Pt/Al2O3 diesel oxidation catalyst after sulphur and calcium treatments[J].Catalysis Today,2010,154(3):303.
[11] SHARMA H,MHADESHWAR A.A detailed micro kinetic model for diesel engine emissions oxidation on platinum-based diesel oxidation catalysts (DOC)[J].Applied Catalysis B:Environmental,2012,127:190.
[12] CHATTERJEE D,BURKHARDT T,RAPPE T,et al.Numerical simulation of DOC+DPF+SCR systems:DOC influence on SCR performance[J].SAE International Journal of Fuels & Lubricants,2009,1(1):440.
[13] 楼狄明,张斌,谭丕强,等.车用柴油机氧化催化转化器仿真模拟与试验分析[J].内燃机,2008(4):30.LOU Diming,ZHANG Bin,TAN Piqiang,et al.Simulation and experimental analysis of diesel oxidation catalyst in the automobile diesel engine[J].Internal Combustion Engines,2008(4):30.
[14] 向立明,谭金龙.车用柴油机氧化催化转化器仿真分析[J].内燃机,2014(2):48.XIANG Liming,TAN Jinlong.Simulation analysis of diesel oxidation catalyst in the automobile diesel engine[J].Internal Combustion Engines,2014(2):48.
[15] HERREROS J M,TSOLAKIS A.Reduction of low temperature engine pollutants by understanding the exhaust species interactions in a diesel oxidation catalyst [J].Environmental Science & Technology,2014,48(4):2361.
[16] KATARE S R,PATTERSON J E,LAING P M.Aged DOC is a net consumer of NO2:analyses of vehicle,engine-dynamometer and reactor data[R].Detroit:SAE,2007.
[17] AL-HARBI M,HAYES R,VOTSMEIER M,et al.Competitive NO,CO and hydrocarbon oxidation reactions over a diesel oxidation catalyst[J].Canadian Journal of Chemical Engineering,2012,90(6):1527.