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.
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Abbreviations
- 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
- D P :
-
Characteristic particle size of PM
- η :
-
The particle filtering efficiency of the DPF
- n :
-
The particle total number concentration
- E a :
-
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
- PO 2 :
-
The partial pressure of oxygen
- R :
-
The gas constant
- T :
-
The reaction temperature
- m(C 1):
-
The removal mass of C in CO
- m(C 2):
-
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
- q a :
-
The flow rate of the active gas
- V m :
-
The gas molar volume
- m(C 12):
-
The sum of m(C1) and m(C2)
- DMC:
-
Dimethyl carbonate
- DME:
-
Dimethyl ether
- DMM:
-
Dimethoxymethane
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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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Tian, J., Cai, Y., Pu, X. et al. Effect of polyoxymethylene dimethyl ethers on particle properties and diesel particulate filter regeneration. Chem. Pap. 73, 455–468 (2019). https://doi.org/10.1007/s11696-018-0593-5
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DOI: https://doi.org/10.1007/s11696-018-0593-5