Effects of PODE Blending Ratio on the Physical Characteristics of Particulate Matters for High-Pressure Common-Rail Diesel Engines

doi:10.7652/xjtuxb201712016

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Effects of PODE Blending Ratio on the Physical Characteristics of Particulate Matters for High-Pressure Common-Rail Diesel Engines

更新时间：2025-07-09

- Effects of PODE Blending Ratio on the Physical Characteristics of Particulate Matters for High-Pressure Common-Rail Diesel Engines
- Vol. 51, Issue 12, Pages: 104-111(2017)
- 作者机构：
  
  江苏大学汽车与交通工程学院,江苏,镇江,212013
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201712016
  CLC： TK421
- Online First：10 December 2017，
  
  Published：2017
- 稿件说明：
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Effects of PODE Blending Ratio on the Physical Characteristics of Particulate Matters for High-Pressure Common-Rail Diesel Engines[J]. 2017, 51(12): 104-111.
DOI：

Effects of PODE Blending Ratio on the Physical Characteristics of Particulate Matters for High-Pressure Common-Rail Diesel Engines[J]. 2017, 51(12): 104-111. DOI： 10.7652/xjtuxb201712016.

摘要

针对增压中冷高压共轨柴油机燃用不同聚甲氧基二甲醚(PODE)掺混比(10%、20%和30%

体积分数)的PODE/柴油混合燃料的颗粒物排放进行了实验研究。分析了PODE掺混比对柴油机NO

和烟度排放以及颗粒粒径分布的影响规律

并采用热重分析法与热解动力学方法研究了颗粒物氧化特性与热解反应活化能。实验结果表明:在柴油中掺混PODE能够降低烟度排放

且下降幅度随着PODE掺混比增加更明显

但在中高负荷时NO

排放略有增加; 随着PODE掺混比增加

颗粒总数量浓度下降

粒径分布曲线向小粒径方向移动

核态颗粒所占比例增加

积聚态颗粒所占比例降低

颗粒的数量浓度峰值、表面积浓度峰值和体积浓度峰值均减小; 在柴油中掺混PODE燃烧颗粒中可溶性有机物(SOF)组分含量增加

碳烟颗粒质量损失率峰值增加

质量损失率峰值所对应温度降低

颗粒热解反应活化能有所减小

颗粒更易被氧化。

Abstract

Particulate matter emissions of polyoxymethylene dimethyl ethers(PODE)/diesel mixture with different PODE blending ratios(10%

20% and 30%)are conducted on a turbocharged intercooled high-pressure common-rail diesel engine. Effects of PODE blending ratio on the diesel NO

smoke and particle size distribution are analyzed. The oxidation features and activation energy of pyrolysis of particles are studied by using the thermogravimetric analysis method and the pyrolysis kinetics method. Results show that the addition of PODE in diesel fuel reduces smoke emission and the decrement becomes more pronounced with the increase of PODE blending ratio. H

owever

the NO

emissions increase slightly at medium and high loads. When PODE blending ratio increases

the total particle concentration decreases

the distribution curve of particle sizes shifts to the smaller particle size

the proportion of nucleation-mode particles increases and the proportion of accumulation-mode particles decreases. In addition

the peak values of particle number concentration

surface area concentration and volume concentration decrease. With the addition of PODE in diesel fuel

the content of soluble organic fraction(SOF)in particulate matters increases

the peak value of the mass loss rate of soot particles increases and its peak temperature decreases. Meantime

the activation energy of pyrolysis reaction of particles reduces

which indicates that the particles are more easily oxidized.

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references

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