Experimental investigation of combustion and particle emissions under different combustion modes on a heavy-duty diesel engine fueled by diesel/gasoline/diesel from direct coal liquefaction

Wu, Binyang; Gu, Wenyu; Bo, Wu; Guo, Jianjun

doi:10.1016/j.fuel.2019.115661

Cited by 14 publications

(4 citation statements)

References 27 publications

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“…31 One of the methodologies used to study the behavior of PM emission is the particle size distribution (PSD) which generally shows a bimodal structure. 32 The nucleation-mode in PSD brings together those particles with sizes between 5 and 30 nm, composed of condensed volatile or semi-volatile material, which through the nucleation forms new particles of greater mass with some solid parts of metal and carbon. Similarly, accumulation-mode brings together particles with sizes between 30 nm to 1 mm made up for agglomerate of soot particles, whose surface contains volatile material absorbed during its formation.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the aftertreatment performance in HD-SI engine fueled with LPG

Bermúdez

Ruíz

Conde

et al. 2021

International Journal of Engine Research

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This research/article aimed to analyze the influence of an after-treatment system (ATS) on emissions of a heavy-duty spark-ignition (HD-SI) engine fueled with liquified D:\APP-SERVER\3B2\3B2AUTO\LOGO\petroleum gas (LPG), in the context of current Euro VI emissions requirements. The ATS is composed by a three-way catalyst (TWC) in series with a diesel particle filter (DPF). Emissions testing were carried out on an engine test bench according to homologation procedures, performing both world harmonized stationary cycle (WHSC) and world harmonized transient cycle (WHTC), to study the effects of the engine operating parameters on pollutant emissions behavior and ATS performance during steady and dynamic states, respectively. Instruments used were a gas analyzer Horiba MEXA ONE to measure gaseous emissions, HORIBA OBS ONE PN to measure particle matter (PM) concentration, and spectrometer TSI EEPS 3090 to measure PM concentration and particle size distribution (PSD). The results showed some important aspects such as the effects of engine speed and load on pollutant emissions formation and ATS performance, the influence of the three-way catalyst (TWC) on particulate matter (PM) reduction due to the relationship between volatile unburned hydrocarbons (UHC) and the emergence of nucleation-mode particles, stressing that ATS implementation is mandatory to meet the current emissions requirements.

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Section: Introductionmentioning

confidence: 99%

Analysis of the aftertreatment performance in HD-SI engine fueled with LPG

Bermúdez

Ruíz

Conde

et al. 2021

International Journal of Engine Research

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“…Particle size magnifier (PSM) and fast particle analyser (DMS500) are used to measure the particles in the size range of 1.2-2.5 nm and 4.87-1000 nm, respectively. 380 Scanning mobility particle sizer (SMPS) (1-1000 nm) and Engine exhaust particle sizer (EEPS) (5.6-560 nm) are also used to measure the particle size-number distributions. 381 PM 1:0 is generally higher at low engine speeds because of low in-cylinder temperature and incomplete combustion.…”

Section: Number Size Distribution Of the Particulatesmentioning

confidence: 99%

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

Agarwal

Krishnamoorthi

2022

International Journal of Engine Research

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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.

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“…The two main criteria for setting limits are combustion stability and engine detonation: when combustion becomes unstable or when detonation becomes unacceptable, the operation is no longer feasible [14] [15]. Since HCCI combustion is determined by chemical kinetics, direct control methods for ignition initiation are difficult, however, there are a number of indirect methods that have the potential to control the auto-ignition and heat release rate of HCCI combustion [3] [10] [11] [16].…”

Section: Introductionmentioning

confidence: 99%

“…Indirect control methods include modifying the properties of the air-fuel mixture and modifying the operation of the engine. The high temperature of the inlet mixture (air-fuel) causes a high rate of heat release, improving the ignition start and reducing the ignition delay, it also allows an advance of the combustion, but the controllable range is limited [11] [17]. Another characteristic is the reduction of the thermal and volumetric efficiency, since, if the ignition advances in the compression phase, it will have a negative impact on the work performed by the piston [7].…”

Section: Introductionmentioning

confidence: 99%

Experimental study of homogeneous charge compression ignition in a light-duty diesel engine operated with commercial gasoline-ethanol

Guzmán,

Braga

2023

Preprint

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An experimental bench was designed and developed to carry out experimental tests of a Diesel cycle engine using gasoline as fuel. The engine (originally a diesel cycle) was fitted with different devices to run in HCCI mode. These modifications did not affect the engine's original condition, which can be returned to diesel mode at any time. Instrumentation was set up to measurement the temperature (exhaust gases, inlet charge inlet, lubricating oil), pressure (intake air, gasoline inlet, combustion chamber), torque, rpm, air flow and fuel flow. The engine was subjected to different operating conditions and control parameters to study and analyze the effects of engine speed, air-fuel ratio and mixture temperature (air-gasoline). The results indicate that higher temperatures or amounts of fuel cause an earlier ignition phase, which would have a direct influence on the beginning of combustion. The results also indicate that, by increasing the amount of fuel and varying the inlet temperature, more useful energy is generated until reaching the limit of the detonation zone. Small gains in combustion efficiency translate into significant energy savings, also reducing exhaust gas pollution levels.

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Experimental investigation of combustion and particle emissions under different combustion modes on a heavy-duty diesel engine fueled by diesel/gasoline/diesel from direct coal liquefaction

Cited by 14 publications

References 27 publications

Analysis of the aftertreatment performance in HD-SI engine fueled with LPG

Analysis of the aftertreatment performance in HD-SI engine fueled with LPG

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

Experimental study of homogeneous charge compression ignition in a light-duty diesel engine operated with commercial gasoline-ethanol

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