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柴油机EGR氛围颗粒的空间结构与表面形态分析

赵洋 许广举 李铭迪 陈庆樟 王忠

赵洋, 许广举, 李铭迪, 陈庆樟, 王忠. 柴油机EGR氛围颗粒的空间结构与表面形态分析[J]. 环境科学研究, 2016, 29(11): 1672-1678.
引用本文: 赵洋, 许广举, 李铭迪, 陈庆樟, 王忠. 柴油机EGR氛围颗粒的空间结构与表面形态分析[J]. 环境科学研究, 2016, 29(11): 1672-1678.
ZHAO Yang, XU Guangju, LI Mingdi, CHEN Qingzhang, WANG Zhong. Spatial Structure and Surface Morphology of Particles from Diesel Engines Equipped with EGR[J]. Research of Environmental Sciences, 2016, 29(11): 1672-1678.
Citation: ZHAO Yang, XU Guangju, LI Mingdi, CHEN Qingzhang, WANG Zhong. Spatial Structure and Surface Morphology of Particles from Diesel Engines Equipped with EGR[J]. Research of Environmental Sciences, 2016, 29(11): 1672-1678.

柴油机EGR氛围颗粒的空间结构与表面形态分析

基金项目: 国家自然科学基金项目(51506011);江苏省高校自然科学研究面上项目(15KJB470001);苏州市应用基础研究项目(SYG201515)

Spatial Structure and Surface Morphology of Particles from Diesel Engines Equipped with EGR

  • 摘要: 为揭示EGR(废气再循环)对柴油机颗粒表面形态以及空间结构的影响,针对不同EGR率下产生的柴油机颗粒,采用颗粒粒径分析仪以及X射线小角散射等分析手段,研究了EGR对柴油机排气颗粒粒径、数浓度和质量浓度的影响,分析了颗粒团聚程度、团粒间隙尺寸以及表面形态等参数随EGR率的变化规律.结果表明:随着EGR率从10%增至30%,颗粒数浓度峰值粒径向大粒径方向偏移,粒径在10~50 nm的核模态颗粒数浓度分别降低了14.7%和29.4%;粒径在50~500 nm的积聚态颗粒数浓度分别增加了17.1%和139.4%;总颗粒数浓度也有较大幅度增加,分别增加了4.5%和72.1%.采用EGR后,颗粒的质量分形维数和表面分形维数分别增加了12.1%和18.2%,表明EGR会使颗粒的质量分布不均匀,表面粗糙程度增加.随着EGR率的增加,颗粒的团粒间隙分布有明显差异,EGR率为0时的团粒间隙尺寸主要分布在8~11 nm,EGR率为30%时的团粒间隙尺寸主要分布在4~6 nm,表明EGR可在总体上降低团粒间隙尺寸和数浓度,增加了颗粒的团聚程度和空间结构的紧密程度.研究结果对于拓宽EGR的工况使用范围、提高DPF等后处理装置的工作效率、进一步降低柴油机的NOx和颗粒排放具有重要意义.

     

  • [1] 王芬娟,方栋,李红.大气超细颗粒物观测和扩散模拟研究进展.环境污染与防治,2010,32(2):79-85.WANG Fenjuan,FANG Dong,LI Hong.A review of atmospheric ultrafine particles measurements and simulations.Environmental Pollution & Control,2010,32(2):79-85.
    [2] GAO Jinglei,YUAN Zengwei,LIU Xuewei,et al.Improving air pollution control policy in China:a perspective based on cost benefit analysis.Science of the Total Environment,2016,543(1):307-314.
    [3] ZHAO J,ZHAO Y,ZHAO X,et al.Agricultural runoff pollution control by a grassed swales coupled with wetland detention ponds system:a case study in Taihu Basin,China.Environmental Science & Pollution Research,2016,23(9):1-12.
    [4] 谭建勋,王志伟,李伟,等.采用EGR和DOC实现柴油机欧Ⅳ排放的试验研究.汽车技术,2011(7):10-13.TAN Jianxun,WANG Zhiwei,LI Wei,et al.Experimental research on Euro Ⅳ emissions of diesel engine by EGR combined with diesel oxidation catalyst(DOC).Automobile Technology,2011(7):10-13.
    [5] LOPZE J M,JIMENZE F,APARICIO F,et al.On-road emissions from urban buses with SCR+Urea and EGR+DPF systems using diesel and biodiesel.Transportation Research Part D:Transport & Environment,2009,14(1):1-5.
    [6] TSOLAKIS A,MEGRITIS A,WYSZYNSKI M L,et al.Engine performance and emissions of a diesel engine operating on diesel-RME(rapeseed methyl ester)blends with EGR(exhaust gas recirculation).Energy,2007,32(11):2072-2080.
    [7] LADOMMATOS N,ABDELHALIM S,ZHAO H.Control of oxides of nitrogen from diesel engines using diluents while minimizing the impact on particulate pollutants.Applied Thermal Engineering,1998,18(11):963-980.
    [8] 田维,林学东,李德刚,等.EGR影响高速直喷柴油机NOx和烟度排放机理的研究.汽车技术,2009(9):26-29.TIAN Wei,LIN Xuedong,LI Degang,et al.Experimental study on effect of EGR on NOx and smoke emission of a high speed direct injection diesel engine.Automobile Technology,2009(9):26-29.
    [9] KUMAR P S,ANTONY F,SAHOO P K.The performance and NOx emissions of a IDI diesel engine at distinct EGR rates fuelled with JB100,JB80,JB60,JB40,JB20 & diesel.International Journal of Engineering Science & Technology,2013,5(3):519-526.
    [10] STEFAN S.Diesel exhaust pre-filter has electrically heated surface bringing exhaust gases to particle self-ignition temperature:Germany DE10156191.2003.
    [11] BENAJES J,GARCIA-OLIVER J M,NOVELLA R,et al.Increased particle emissions from early fuel injection timing diesel low temperature combustion.Fuel,2012,94(1):184-190.
    [12] 赵洋,王宇成,王忠,等.柴油甲醇燃烧颗粒的碳结构参数分析.环境科学研究,2014,27(12):1472-1478.ZHAO Yang,WANG Yucheng,WANG Zhong,et al.Carbon structure parameter analysis of particulate matter from diesel/methanol combustion.Research of Environmental Sciences,2014,27(12):1472-1478.
    [13] LAPUERTA M,MARTOS F J,HERREROS J M.Effect of engine operating conditions on the size of primary particles composing diesel soot agglomerates.Journal of Aerosol Science,2007,38(4):455-466.
    [14] 李铭迪,赵琛,许广举,等.柴油碳酸二甲酯燃烧颗粒的微观结构和分形特征.环境科学研究,2016,29(6):900-906.LI Mingdi,ZHAO Chen,XU Guangju,et al.Microstructure and fractal characteristic analysis of particulate matter from diesel/DMC combustion.Research of Environmental Sciences,2016,29(6):900-906.
    [15] 洪亮.预混火焰碳烟颗粒的形貌结构特征及团聚力的研究.天津:天津大学,2012.
    [16] ZHU J,LEE K O,YOZGATLIGIL A,et al.Effects of engine operating conditions on morphology,microstructure,and fractal geometry of light-duty diesel engine particulates.Proceedings of the Combustion Institute,2005,30(2):2781-2789.
    [17] 楼狄明,徐宁,谭丕强,等.废气再循环对燃用生物柴油发动机排放的影响.同济大学学报:自然科学版,2016,44(2):291-297.LOU Diming,XU Ning,TAN Piqiang,et al.Effects of EGR on emission characteristics of low-duty engine fueled with biodiesel.Journal of Tongji University(Natural Science),2016,44(2):291-297.
    [18] 周黎鹏,许朕,李新令,等.喷油策略及EGR对柴油机排放微粒中碳质组分的影响.上海交通大学学报,2013,47(11):1745-1751.ZHOU Lipeng,XU Zhen,LI Xinling,et al.Effect of fuel injection strategies and EGR on diesel particle carbon components.Journal of Shanghai Jiaotong University,2013,47(11):1745-1751.
    [19] RANDAL L.A TEM methodology for the study of soot particle structure.Combustion Science & Technology,1997,126(1):333-351.
    [20] VIOLI A.Modeling of soot particle inception in aromatic and aliphatic premixed flames.Combustion & Flame,2004,139(4):279-287.
    [21] LEE K O,COLE R,SEKARR R,et al.Morphological investigation of the microstructure,dimensions,and fractal geometry of diesel particulates.Proceedings of the Combustion Institute,2002,29(1):647-653.
    [22] 汪冰,荆隆,丰伟悦,等.同步辐射X射线小角散射法研究纳米ZnO和Fe2O3颗粒在分散介质中的尺寸和形.核技术,2007,30(7):576-579.WANG Bing,JING Long,FENG Weiyue,et al.Characterization of size and morphology of ZnO and Fe2O3 nanoparticles in dispersive media by SAXS.Nuclear Techniques,2007,30(7):576-579.
    [23] 闫冠云,田强,黄朝强,等.热损伤奥克托金缺陷的X射线小角散射研究.物理学报,2012,61(13):1-7.YAN Guangyun,TIAN Qiang,HUANG Chaoqiang,et al.A small-angle X-ray scattering study of micro-defects in thermally treated hmx.Physica Sinice,2012,61(13):1-7.
    [24] SEGEL D J,FINK A L,HODGSON K O,et al.Protein denaturation:a small-angle X-ray scattering study of the ensemble of unfolded states of cytochrome C.Biochemistry,1998,37(36):12443-12451.
    [25] ZHU Caizhen,LIU Xiaofang,YU Xiaolang,et al.A small-angle X-ray scattering study and molecular dynamics simulation of microvoid evolution during the tensile deformation of carbon fibers.Carbon,2012,50(1):235-243.
    [26] MERTENS H D T,SVERGUN D I.Structural characterization of proteins and complexes using small-angle X-ray solution scattering.Journal of Structural Biology,2010,172(1):128-141.
    [27] YOO T Y,MEISBURGER S P,HINSHAW J,et al.Small-angle X-ray scattering and single-molecule FRET spectroscopy produce highly divergent views of the low-denaturant unfolded state.Journal of Molecular Biology,2012,418(3/4):226-236.
    [28] BAK P,TANG C,WIESENFELD K.Structural characterization of flexible proteins using small-angle X-ray scattering..Journal of the American Chemical Society,2007,129(17):5656-5664.
    [29] BALE H D,SCHMIDT P W.Small-angle X-ray-scattering investigation of submicroscopic porosity with fractal properties.Physical Review Letters,1984,53(6):596-599.
    [30] MARLI R C,WOIGNIER T,DIEUDONN P,et al.Two fractal structures in areogel.J Non-Cryst Solids,2001,285(13):175-180.
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出版历程
  • 收稿日期:  2016-04-11
  • 修回日期:  2016-07-16
  • 刊出日期:  2016-11-25

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