Effect of pre-main-post diesel injection strategy on greenhouse gas and nitrogen oxide emissions of natural gas/diesel dual-fuel engine at high load conditions

Yousefi, Amin; Guo, Hongsheng; Dev, Shouvik; Liko, Brian; Lafrance, Simon

doi:10.1016/j.fuel.2021.121110

Cited by 21 publications

(4 citation statements)

References 34 publications

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“…Meanwhile, they found that the fuel economy is improved when the injection timing is properly advanced. Yousefi et al [19] and Cong et al [20] studied pre-main-post diesel injection and proposed a reasonable strategy for dual-fuel combustion through experiments and simulations. They found that this strategy could significantly reduce greenhouse gas and NOx emissions by 10% and 47%, compared to the original fuel injection strategy.…”

Section: Introductionmentioning

confidence: 99%

Research on the Ignition Strategy of Diesel Direct Injection Combined with Jet Flame on the Combustion Character of Natural Gas in a Dual-Fuel Marine Engine

Liu,

Liu

2024

JMSE

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In large-bore two-stroke diesel/nature gas dual-fuel marine engines, a certain quantity of diesel is injected into the cylinder to satisfy the full-power output engine rated power of the gas mixture. However, the ignition and flame propagation process based on the injection strategy of diesel direct injection combined with diesel jet flame on the ignition and combustion of natural gas is unclear, which directly affects the power and the thermal efficiency of engine and emissions. Therefore, this work numerically investigates the flame propagation characteristic under the strategy of the main and pilot diesel modes. The influence of the injection timing and proportion of diesel on combustion and emission performance are further analyzed. The results show that the influence of the injection timing of main diesel (MDIT) on the combustion process and emission performance is more obvious than that of the injection timing of pilot diesel (PDIT). The results indicate that the MDIT increased from −2°CA to −8°CA, the power increased by 316 kW, and the thermal efficiency improved by 1.5%. However, the CO2 emissions increased by 10.5 g/kWh, and the NOx emissions increased by 0.7 g/kWh. Additionally, an early PDIT is not conducive to the rapid organization of combustion, resulting in decreased engine power and thermal efficiency. Furthermore, it was found that the power improved by 50 kW and the thermal efficiency improved by 0.6%, with a decrease in the main diesel ratio (MDR) from 100% to 90%. Meanwhile, the CO2 emissions decreased by 4 g/kWh, although there was no obvious change in NOx emissions with the advance of MDR.

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Section: Introductionmentioning

confidence: 99%

Research on the Ignition Strategy of Diesel Direct Injection Combined with Jet Flame on the Combustion Character of Natural Gas in a Dual-Fuel Marine Engine

Liu,

Liu

2024

JMSE

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“…In the case of natural gas, relevant studies such as Yousefi et al [ 13 ]; Ayaz et al [ 14 ]; Kim et al [ 15 ] have shown that natural gas combustion mainly emits carbon dioxide, nitrous oxide, and sometimes methane when unburnt. Also, it has been established that natural gas emits less carbon dioxide than coal [ 6 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

A novel empirical model for predicting the carbon dioxide emission of a gas turbine power plant

Egware

Kwasi-Effah

2023

Heliyon

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“…When inhaled, organic particle pollutants are harmful to human lungs and health . Other greenhouse gases emitted from diesel combustion are also of concern in terms of causing atmospheric pollution . Much effort has been made to improve and endurably develop diesel engines for sustainability in various aspects, for example,, renewable fuel, pollution reduction, energy consumption, and so forth.…”

Section: Introductionmentioning

confidence: 99%

Nanoparticle Components and Number–Size Distribution of Waste Cooking Oil-Based Biodiesel Exhaust Gas from a Diesel Particulate Filter-Equipped Engine

et al. 2022

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An experimental study of the particulate matter (PM)-related emissions from the combustion of waste cooking oil (WCO)-based biodiesel-blended (0%, 30%, and 100% v/v) fuels in a four-cylinder diesel particulate filter (DPF)-equipped engine was carried out. A laboratory-scale DPF under the controlled conditions was installed into an aftertreatment system, and the PM mass and number characteristics were investigated. The combustion analysis based on in-cylinder pressure shows that the added WCO shortened the ignition delay, advanced the combustion ignition, and increased peak pressure values compared to conventional diesel fuel. The WCO increase in specific fuel consumption led to a slight reduction in brake thermal efficiency. The WCO-fueled engine showed reduced PM and total unburned hydrocarbon but increased nitric oxide emission. The nucleation and accumulation were characterized for nanoparticle number and size distribution. The particle number (PN) concentration in total was declined to smaller values when fueling with WCO. In the thermogravimetric analysis, the PM of WCO oxidized to a greater level than that of diesel fuel, which was observed by the weight loss rates during the specified heating program. WCO lowered the elemental carbon (EC) part of PM than diesel fuel. When equipping an exhaust system with DPF, the EC and the total PN drastically reduced while the particle size slightly increased. The use of DPF with the WCO biodiesel mitigated both EC and organic carbon components of the captured particles of the released PM.

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Effect of pre-main-post diesel injection strategy on greenhouse gas and nitrogen oxide emissions of natural gas/diesel dual-fuel engine at high load conditions

Cited by 21 publications

References 34 publications

Research on the Ignition Strategy of Diesel Direct Injection Combined with Jet Flame on the Combustion Character of Natural Gas in a Dual-Fuel Marine Engine

Research on the Ignition Strategy of Diesel Direct Injection Combined with Jet Flame on the Combustion Character of Natural Gas in a Dual-Fuel Marine Engine

A novel empirical model for predicting the carbon dioxide emission of a gas turbine power plant

Nanoparticle Components and Number–Size Distribution of Waste Cooking Oil-Based Biodiesel Exhaust Gas from a Diesel Particulate Filter-Equipped Engine

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