Effect of charge dilution on gaseous and particulate emissions from a diesel engine fueled with biodiesel and biodiesel blended with methanol and ethanol

Effect of charge dilution on gaseous and particulate emissions from a diesel engine fueled with biodiesel and biodiesel blended with methanol and ethanol
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充气稀释对使用生物柴油和与甲醇和乙醇混合的生物柴油的柴油发动机的气体和颗粒物排放的影响

DOI:
10.1016/j.applthermaleng.2011.03.023
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发表时间:
2011-10
影响因子:
6.4
通讯作者:
Zhen Huang
Zhen Huang
中科院分区:
工程技术2区
文献类型:
--
作者:
Lei Zhu;CS Cheung;Wugao Zhang;Zhen Huang

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本文研究了以生物柴油、乙醇-生物柴油和甲醇-生物柴油为燃料的4缸直喷柴油机,进气充注二氧化碳稀释对其燃烧和排放特性的影响。随着进气co2浓度的增加,各燃料的CO、HC、颗粒质量浓度、颗粒数浓度和几何直径(GMD)均增加,而nox明显降低。在生物柴油中添加甲醇和乙醇后,与生物柴油相比,各摄入co2浓度下的NOx、颗粒物质量浓度和颗粒物数浓度均有所降低。此外,当吸入二氧化碳浓度从2%增加到5.6%时,乙醇-生物柴油混合物的颗粒质量浓度几乎保持不变。这意味着酒精-生物柴油混合物与进料稀释相结合可以减少nox的排放,并将颗粒物质量浓度维持在相对较低的水平。
In this study, the effect of intake charge dilution with carbon dioxide on the combustion and emission characteristics of a 4-cylinder direct-injection diesel engine fueled with biodiesel, ethanol-biodiesel and methanol-biodiesel were investigated. With increase of intake CO2concentration, CO, HC, particulate mass concentration, particle number concentration and geometric diameter (GMD) of all fuels increased while NOxdecreased obviously. After addition of methanol and ethanol in biodiesel, the NOx, particulate mass concentration and particle number concentration decreased at each intake CO2concentration, compared with biodiesel. Moreover, as the intake CO2concentration increased from 2% to 5.6%, particulate mass concentration of the alcohol-biodiesel blends remained almost unchanged. It means that the combination of alcohol-biodiesel blends with intake charge dilution could reduce the NOxemission and maintains particulate mass concentration at a relatively low level.
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