Experimental investigation of particulate matter structures under partially premixed combustion in a compression ignition engine

Chen, Hanyu; Wang, Minfei; Wang, Xi; Li, Deqiang; Pan, Zhixiang; Bae, Choongsik

doi:10.1016/j.fuel.2019.116286

Cited by 17 publications

(4 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“… T f signifies the ratio of microcrystal length to the direct span of their endpoints. 183 However, adding biodiesel to diesel did not show a substantial reduction in D p . 450 Increasing biodiesel fraction in diesel-biodiesel blends reduced the carbon in the soot.…”

Section: Physical Characterization Of Diesel Soot Particlesmentioning

confidence: 97%

“…182 The rich fuel-air mixture produces higher soot surface growth than reduction in soot surface growth due to soot oxidation, yielding larger particles. 183 Figure 12 depicts typical soot surface growth in diesel engines. 184 Lower soot surface growth was obtained for the biodiesel-diesel blend than diesel due to biodiesel’s inherent fuel oxygen.…”

Section: Soot Evolutionmentioning

confidence: 99%

See 1 more Smart Citation

Review of morphological and chemical characteristics of particulates from compression ignition engines

Agarwal

Krishnamoorthi

2022

International Journal of Engine Research

View full text Add to dashboard Cite

Particulates from compression ignition (CI) engines have received serious attention in the last two decades. CI engines emit higher particulate matter (PM) and nitrogen oxides (NOx) than spark ignition (SI) engines. Both these species are harmful to human health and the environment. Compared to NOx emissions, PM constitutes many more chemical species in solid and liquid phases. This review paper focuses on soot morphology and chemical characterization of PM emissions from CI engines. Effects of different fuels, lubricating oil, and engine operating conditions on particulate characteristics are analyzed exhaustively. The first part of this paper focuses on the effects of particulates on living organisms, the consequences of exposure to diesel particulates, and the composition of diesel particulates. In recent decades, micro and nano-scale characteristics of PM have been exhaustively investigated to understand its structure, formation, and chemical functionalities. Typically, particulates comprise of elemental carbon (EC), organic carbon (OC), polycyclic aromatic hydrocarbons (PAHs), the soluble organic fraction (SOF), and trace metals. This paper summarizes most aspects of diesel particulate emissions for the benefit of active researchers in the field and underlines the importance of particulate emission reduction from the CI engines. Diesel combustion generates particles with enormous long-chain aggregates of smaller sizes and immature soot particles. Low-temperature combustion (LTC) modes and oxygenated fuels reduce the soot emissions and generate compact/clustered aggregates. Oxygenated fuels in CI engines produce more nucleation mode particles (NMPs) and high-reactivity soot aggregates. Higher trace metal concentrations were observed in diesel origin particulates than biofuel origin particulates. Biodiesel origin particulates possess higher mutagenicity and carcinogenicity because of nitro-PAHs. Transient engine operations cause higher particulates than steady-state engine operations.

show abstract

Section: Physical Characterization Of Diesel Soot Particlesmentioning

confidence: 97%

Section: Soot Evolutionmentioning

confidence: 99%

Review of morphological and chemical characteristics of particulates from compression ignition engines

Agarwal

Krishnamoorthi

2022

International Journal of Engine Research

View full text Add to dashboard Cite

show abstract

“…Compared to conventional diesel combustion, fewer VOCs in PPCI are also identified. Compared to diesel fuel, LHC has short carbon chains and most of them represent straight chains, which produces fewer polycyclic aromatic hydrocarbons and other gaseous components [28]. In addition, LHC presents higher volatility and retarded ignition characteristics which facilitates fuel droplet mixing with air sufficiently and further homogeneous mixture is formed.…”

Section: Gc-ms Detection Of Unregulated Emissionsmentioning

confidence: 99%

Identifying Unregulated Emissions from Conventional Diesel Self-Ignition and PPCI Marine Engines at Full Load Conditions

Wang

Han³

et al. 2020

JMSE

Self Cite

View full text Add to dashboard Cite

A study on unregulated emissions of a conventional diesel self-ignition and partial premixed compression ignition (PPCI) marine engine at full load condition was performed, respectively. In this work, PPCI was realized in a marine engine by blending 15% diesel with 85% light hydrocarbons (LHC). Gas chromatography-mass spectrometry (GC-MS) was used to detect and identify unregulated emissions, and the chemical formula and peak area of representative species were obtained. Furthermore, the unregulated emissions were classified and semi-quantitatively analyzed. The results show that the maximum in-cylinder pressure of PPCI is almost 11 bar lower than that of conventional diesel combustion, and the crank angle at that moment is also delayed by 2 • CA. Compared to conventional diesel combustion, the maximum pressure rise rate of PPCI is reduced by 3.5%, while the maximum heat release rate of PPCI increases by 23.5%. Further, PPCI produces fewer species in unregulated emissions, and their chemical formula are less complex than that of conventional diesel combustion. Compared to conventional diesel combustion, the relative concentration of alkane and organic components in PPCI decreases significantly, while ketone and ester increase.

show abstract

“…Diesel engines have been used widely in applications such as commercial vehicles, passenger cars, power generators, and construction equipment due to their high thermal efficiency, reliability, and large output power [1,2]. However, high nitrogen oxide (NOx) and particulate matter (PM) emissions are significant drawbacks of diesel engines [3,4].…”

Section: Introductionmentioning

confidence: 99%

Soot Particle Size Distribution, Regulated and Unregulated Emissions of a Diesel Engine Fueled with Palm Oil Biodiesel Blends

Choi

2020

Energies

View full text Add to dashboard Cite

In this study, five fuels including pure diesel (B0), pure palm oil biodiesel (B100), and their blends (B10, B20, and B30) were investigated in relation to soot particle distribution and regulated and unregulated emission characteristics in a common rail direct injection (CRDI) diesel engine. The results indicated that CO, hydrocarbon (HC), and particulate matter (PM) regulated emissions were effectively controlled to a very low level by combining the addition of palm oil biodiesel (POB) to diesel with optimized engine operating conditions. Paper filters and TEM grids were used to capture the diesel particles. All the PM primary particles were less than 100 nm in diameter observed by TEM, and the average diameters of the PM primary particles for the biodiesel blends were distributed between 20 and 26 nm. Unregulated emissions such as trace metals including Pb, Mn, and Ba were found in the PM particles, and the xylene, toluene, and benzene unregulated emissions of B100 were reduced by 55.68%, 21.56%, and 18.32%, respectively, compared to those of B0. Therefore, POB is an excellent alternative fuel for diesel engines and has great application potential to solve the current pollution problems of regulated and unregulated emissions.

show abstract

Experimental investigation of particulate matter structures under partially premixed combustion in a compression ignition engine

Cited by 17 publications

References 38 publications

Review of morphological and chemical characteristics of particulates from compression ignition engines

Review of morphological and chemical characteristics of particulates from compression ignition engines

Identifying Unregulated Emissions from Conventional Diesel Self-Ignition and PPCI Marine Engines at Full Load Conditions

Soot Particle Size Distribution, Regulated and Unregulated Emissions of a Diesel Engine Fueled with Palm Oil Biodiesel Blends

Contact Info

Product

Resources

About