Experimental Study on Adsorption and Structural Feature of Diesel Engine Exhaust Particles

doi:10.7652/xjtuxb202003017

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Experimental Study on Adsorption and Structural Feature of Diesel Engine Exhaust Particles

更新时间：2025-07-09

- Experimental Study on Adsorption and Structural Feature of Diesel Engine Exhaust Particles
- Vol. 54, Issue 3, Pages: 134-142(2020)
- 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/xjtuxb202003017
  CLC： TK421
- Online First：10 March 2020，
  
  Published：2020
- 稿件说明：
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Experimental Study on Adsorption and Structural Feature of Diesel Engine Exhaust Particles[J]. 2020, 54(3): 134-142.
DOI：

Experimental Study on Adsorption and Structural Feature of Diesel Engine Exhaust Particles[J]. 2020, 54(3): 134-142. DOI： 10.7652/xjtuxb202003017.

摘要

针对柴油机排气颗粒的吸附能力以及与吸附相关的结构特征研究不足的现状

对柴油机不同工况排气颗粒的吸附能力和结构特征进行了测量与分析。通过柴油机试验台架采集了柴油机不同工况(100%负荷下转速分别为1 500、2 700、3 600 r/min)下的排气颗粒

采用氮气吸附法对柴油机排气颗粒的吸附性能进行了测量

通过多点BET法、DFT法、FHH法分别对柴油机排气颗粒的比表面积、孔隙结构、分形维数进行了表征

探讨了颗粒的结构特征参数随柴油机转速的变化规律

并运用透射和扫描电镜对颗粒结构特征参数随柴油机转速变化的规律进行了分析。结果表明:柴油机排气颗粒具有吸附能力

氮气吸附等温线属第II类等温吸附趋势

随着柴油机转速的增加

颗粒吸附能力增强; 颗粒的孔径分布呈多峰连续分布

孔径分布于8～80 nm

属中孔和大孔范畴; 当柴油机转速为1 500、2 700、3 600 r/min时

比表面积分别为65.408、78.562、101.885 m

孔容积分别为0.093、0.113、0.152 mL/g

分形维数分别为2.551 5、2.561 3、2.584 9

平均孔径分别为14.483、13.236、10.736 nm; 颗粒的比表面积、累积孔容积和分形维数随柴油机转速的增加而增大

平均孔径随柴油机转速的增加而减小。

Abstract

In view of the current situation that the researches the adsorption capacity of diesel engine exhaust particles and the structural characteristics related to adsorption are insufficient

the adsorption capacity and structural feature of diesel engine exhaust particles under different working conditions were measured and analy-ed. Particles in diesel engine exhaust under different operating conditions(100% load

1 500 r/min

2 700 r/min

3 600 r/min)were collected by diesel engine test bench. The adsorption performance of the diesel engine exhaust particles was measured by nitrogen adsorption method. The specific surface area

pore structure parameters and fractal dimension of the diesel engine exhaust particles were measured by multi-point BET method

DFT method and FHH method

respectively. The change law of particulate structure characteristic parameters with diesel engine speed was discussed

and the change law of particulate structure characteristic parameters with diesel engine sp

关键词

Keywords

references

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