Work

Physicochemical Characteristics of Particulate Matter Emitted from the Oxygenated Fuel/Diesel Blend Engine

Year: 2021

Type: article

Abstract: The physicochemical characteristics of particulate matter (PM) produced by polyoxymethylene dimethyl ethers (PODE2-4)/diesel blended fuel at different blend ratios was characterized using transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). TEM analysis indicated that the overall size of PM decreased with an increasing PODE2-4 concentration. TEM images using fractal theory showed that the fractal dimension of PM increased as the PODE2-4 blending ratio increased. These trends increased the oxidation activity. FTIR was used to analyze the aliphatic C-H on the surface of PM and found that the ratio IC-H/IC=C and the aliphatic C-H functional group on the surface of PM decreased with an increasing PODE2-4 blending ratio. According to XPS data, with increments of the PODE2-4 blending ratio, the contents of O/C, sp3/sp2, C-OH, C=O and total oxygen-containing functional groups of the PM increased, demonstrating that the oxygen-containing functional group and disorder of the PM nanostructure was correlated with a faster oxidation rate. Results thus demonstrated that the addition of PODE2-4 can affect the nanostructure and oxidation activity of PM, making it easier to oxidize to reduce environmental pollution.

Source: Aerosol and Air Quality Research

DOI: 10.4209/aaqr.210175

Authors: Hao Yang, Yongqiang Zhang, Cong Li, Yu Fang, Xinghu Li

Institutions: Shanghai University of Engineering Science, Beihang University

Language: English

Topic: Advanced Combustion Engine Technologies

Subfield: Fluid Flow and Transfer Processes

Field: Chemical Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,090

Funder: National Natural Science Foundation of China