The effect of operating parameters on regeneration characteristics and particulate emission characteristics of diesel particulate filters

Fang, Jia; Meng, Zhongwei; Li, Jiansong; Du, Yuheng; Quan, Yuan; Jiang, Yuan; Bai, Weilian; Chase, George G.

doi:10.1016/j.applthermaleng.2018.11.066

Cited by 118 publications

(43 citation statements)

References 32 publications

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“…A number of studies have been conducted to investigate the influence of regeneration conditions on the PM emission performance of DPF 23‐25 . The various mechanisms obtained from these investigations could reasonably explain the increase phenomenon of PM emission from DPF during regeneration 26‐30 . But these past investigations main focused on the regeneration performance of traditional unidirectional flow DPF.…”

Section: Introductionmentioning

confidence: 99%

Study on characteristics of particulate emission of diesel aftertreatment with reciprocating flow

Deng

Wang

et al. 2021

Energy Science & Engineering

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In this article, in order to optimize diesel aftertreatment system with periodically reciprocating flow (PRF), an experimental study is conducted to investigate its characteristics such as pollution emissions, regeneration of diesel particulate filter (DPF), concentration, and size distribution of particulate matter (PM) escaped as well as temperature distribution under unidirectional flow and PRF operating conditions. The effects of reciprocating flow cycle and exhaust gas flow on the performance of aftertreatment system are investigated in detail. The energy efficiency analysis of the aftertreatment system is also carried out. Experimental results show that (a) as the temperature is lower than the light‐off threshold of combustible gas, the aftertreatment system cannot restrain the formation of second particles under the low‐temperature condition of unidirectional flow; and (b) the aftertreatment system demonstrates excellent performance of trapping particles and filter regeneration as the symmetrical temperature distribution is formed. The PM filter efficiency αPM is 92%, and the specific energy consumption β is 124% for symmetrical temperature distribution; (c) the increase in reciprocating flow cycle could lead to the shifting of the temperature profiles, and this would affect the particle size distribution; (d) a certain increase in exhaust gas flow from engine would have insignificant change for the temperature distribution; and (e) the critical energy efficiency ηc of the system could reach 96.61%.

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Section: Introductionmentioning

confidence: 99%

Study on characteristics of particulate emission of diesel aftertreatment with reciprocating flow

Deng

Wang

et al. 2021

Energy Science & Engineering

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“…However, it tended to increase the emissions of particulate matter (PM), and the soot deposits generated from engine components might decrease the power density and the durability of the engines [11]. The other ways to reduce conventional pollutant emissions included implementing various exhaust gas after-treatment devices such as diesel particulate filters (DPFs) [12][13][14] and selective catalytic reduction (SCR) [14][15][16]. The drawbacks of these after-treatment devices are high capital and maintenance costs.…”

Section: Introductionmentioning

confidence: 99%

“…Figure12. Impact of pilot injection mass ratio on the distribution of temperature, fuel-air equivalence ratio, NOx formation, and soot formation at the moment of 50% accumulative heat release (q50) for various injection cases.…”

mentioning

confidence: 99%

Impact of Pilot Injection on Combustion and Emission Characteristics of a Low-Speed Two-Stroke Marine Diesel Engine

et al. 2021

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Low-speed two-stroke marine diesel engines dominate the modern global long-distance transportation market; with the increasingly stringent regulations, the combustion and emissions of these engines is gaining intense interest. The primary objective of the present study was to understand the effects of air-fuel mixing by pilot injection strategy on the combustion and emission characteristics of the marine diesel engines through a numerical study. Specifically, a computational fluid dynamic (CFD) model was established and validated by experimental data for a typical low-speed two-stroke marine diesel engine. The combustion parameters under different stages were analyzed, including mean in-cylinder temperature and pressure, indicated thermal efficiency (ITE), indicated specific fuel consumption (ISFC), and distribution of fuel-air mixture. Results indicated that, due to the premixing effect, the pilot injection produced unburned soot from the main injection’s ignition as well as decrease the intervals between the middle and final stages of combustion, thus raising the in-cylinder temperature. The interaction between the reduction of soot particles resulted from the increased temperature, and the decrease of the stage intervals led to lower overall boundary heat loss, which improved the effective thermal efficiency. The pilot injection timing and quality, respectively, showed quadratic and linear impact modes on engine performance and emissions.

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“…23 Therefore, a great deal of effort has been devoted to investigating the regeneration process for the extension of DPF life time and emission reduction. 24,25 Initially, it was reported that PM mainly contains dry soot, SOF, sulfates, ash, and moisture. 26 Similarly, Mohankumar et al 27 proposed that PM could be divided into a soluble and insoluble organic fraction, and soot accounts for the major proportion.…”

Section: Introductionmentioning

confidence: 99%

Thermogravimetric analysis of soot combustion in the presence of ash and soluble organic fraction

et al. 2020

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The effect of operating parameters on regeneration characteristics and particulate emission characteristics of diesel particulate filters

Cited by 118 publications

References 32 publications

Study on characteristics of particulate emission of diesel aftertreatment with reciprocating flow

Study on characteristics of particulate emission of diesel aftertreatment with reciprocating flow

Impact of Pilot Injection on Combustion and Emission Characteristics of a Low-Speed Two-Stroke Marine Diesel Engine

Thermogravimetric analysis of soot combustion in the presence of ash and soluble organic fraction

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