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Chemical Papers

, Volume 73, Issue 2, pp 455–468 | Cite as

Effect of polyoxymethylene dimethyl ethers on particle properties and diesel particulate filter regeneration

  • Jing Tian
  • Yixi CaiEmail author
  • Xiaoyu Pu
  • Linbo Gu
  • Yunxi Shi
  • Yingxin Cui
  • Runlin Fan
Original Paper
  • 45 Downloads

Abstract

The emission tests were performed on a light-duty direct injection diesel engine. A polyoxymethylene dimethyl ethers (PODE) mixture was blended with diesel at a volume ratio of 0, 10, 20 and 30%, denoted as P0, P10, P20 and P30, respectively. The particle size distribution before and after the diesel particulate filter (DPF) was measured to evaluate the DPF filtering efficiency of various modal particles. The oxidation activity of the particles on the DPF intake end plane was analyzed by the Arrhenius method. The regeneration of the DPF was conducted using a non-thermal plasma (NTP) injection system. The results showed that blending PODE with diesel contributed to reducing the particle number concentrations. PODE adversely affected the improvement of the DPF filtering efficiency, especially that of P30. However, the DPF filtering efficiency of all fuels was still higher than 94%. Blending PODE with diesel increased the mass fraction of volatile substances (VS) and decreased the mass fraction of dry soot. Particles of P20 showed a better oxidation activity with lower apparent activation energy. In addition, PODE increased the DPF regeneration effect by NTP technology. The deposit removal mass of the DPF rose to the peak level and then decreased as the PODE blending ratio increased. The better DPF regeneration effect was observed when P20 was employed.

Keywords

Polyoxymethylene dimethyl ethers Diesel particulate filter Regeneration Non-thermal plasma Particles 

List of symbols

PODE

Polyoxymethylene dimethyl ethers

DPF

Diesel particulate filter

NTP

Non-thermal plasma

VS

Volatile substances

DS

Dry soot

PM

Particulate matter

SOF

Soluble organic fraction

ULSD

Ultra-low sulfur diesel

B100

Biodiesel fuel

B20

20% biodiesel/diesel blends

FT

Fischer–Tropsch fuel

CO

Carbon monoxide

CO2

Carbon dioxide

NOx

Nitrogen oxide

TG

Thermogravimetric

DTG

Differential thermogravimetric

LHV

Low heating values

P0

Diesel

P10

10% PODE/diesel blends

P20

20% PODE/diesel blends

P30

30% PODE/diesel blends

INTP

Indirect non-thermal plasma

CN

Cetane number

PAHs

Polycyclic aromatic hydrocarbons

EEPS

Engine exhaust particle sizer spectrometer

DBD

Dielectric barrier discharge

DP

Characteristic particle size of PM

η

The particle filtering efficiency of the DPF

n

The particle total number concentration

Ea

Apparent activation energy

m

The mass of reactants at the time of t

t

The time of the heating process

A

The pre-exponential factor

PO2

The partial pressure of oxygen

R

The gas constant

T

The reaction temperature

m(C1)

The removal mass of C in CO

m(C2)

The removal mass of C in CO2

c1

The volume fraction of CO

c2

The volume fraction of CO2

M

The molar mass of C

qa

The flow rate of the active gas

Vm

The gas molar volume

m(C12)

The sum of m(C1) and m(C2)

DMC

Dimethyl carbonate

DME

Dimethyl ether

DMM

Dimethoxymethane

Notes

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 51676089), the Key University Science Research Project of Jiangsu Province (No. 16KJA470002), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), and the Science Research Project of Xuzhou Institute of Technology (No. XKY2016223).

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Copyright information

© Institute of Chemistry, Slovak Academy of Sciences 2018

Authors and Affiliations

  1. 1.School of Automotive and Traffic EngineeringJiangsu UniversityZhenjiangChina
  2. 2.School of Mechanical and Electrical EngineeringXuzhou Institute of TechnologyXuzhouChina

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