Impact of Lambda Value on Combustion Characteristics and Emissions of Syngas-Diesel Dual-Fuel Engine

Mahmood, Hussein A.; Al-Sulttani, Ali Omran; Mousa, Naseer A.; Attia, Osam H.

doi:10.14716/ijtech.v13i1.5060

Cited by 4 publications

(3 citation statements)

References 22 publications

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“…This proves that the quality of combustion improves with the addition of forced combustion air to increase the amount of oxygen in the cylinder. This was also shown in previous studies (Baskar & Senthilkumar, 2016;Hassan, Zainal, & Miskam, 2011;Hassan, Zainal, Aizat, et al, 2011;He et al, 2022;Mahmood et al, 2022;Palaniswamy et al, 2016;Peng et al, 2018). Moreover, adding combustion air affected the CO concentrations in all engine loads.…”

Section: Co Emissionssupporting

confidence: 86%

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Effect of Adding Combustion Air on Emission in a Diesel Dual-Fuel Engine with Crude Palm Oil Biodiesel Compressed Natural Gas Fuels

Yuvenda

Sudarmanta

Wahjudi

et al. 2022

Int. J. Renew. Energy Dev.

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A diesel dual-fuel engine uses two fuels designed to reduce the consumption of fossil fuels. Generally, the specific fuel consumption of diesel dual-fuel engines has increased. However, in combination with alternative fuels, namely compressed natural gas injected through air intake, the use of diesel fuel can be reduced. However, using two fuels in a diesel dual-fuel engine increases the equivalent ratio; therefore, the air and fuel mixture becomes richer because the air entering the cylinder during the intake stroke is partially replaced by compressed natural gas. This results in incomplete combustion and increases exhaust emissions, particularly hydrocarbon (HC) and carbon monoxide (CO) emissions. This study aims to improve the combustion process in dual-fuel diesel engines by improving the air-fuel ratio; thus, it can approach the stoichiometric mixture by adding combustion air forcibly to produce complete combustion to reduce CO and HC emissions. An experimental approach using a single-cylinder diesel engine modified into a diesel dual-fuel engine powered by crude palm oil biodiesel and compressed natural gas was adopted. The combustion air was forcibly added to the cylinder using an electric supercharger at different air mass flow rates ranging from 0.007074 to 0.007836 kg/s and different engine loads (1000 to 4000 watts). The results indicated that adding more air to the cylinder could produce complete combustion, reducing the emission levels produced by a diesel dual-fuel engine. An air mass flow rate of 0.007836 kg/s can reduce CO, HC, and particulate matter emissions by averages of 60.55%, 49.63%, and 86.87%, respectively, from the standard diesel dual-fuel engine. Increasing in the amount of oxygen concentration improves the quality of the air-fuel ratio, which results in improved combustion and thereby reducing emissions.

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Section: Co Emissionssupporting

confidence: 86%

“…Excess air results in high carbon dioxide (CO 2 ) formation (Heywood, 1988). Mahmood et al (2022) explained that when the air concentration is richer in the ratio of the fuel mixture, all the C can be converted to CO2, and it does not form CO.…”

Section: Co Emissionsmentioning

confidence: 99%

Effect of Adding Combustion Air on Emission in a Diesel Dual-Fuel Engine with Crude Palm Oil Biodiesel Compressed Natural Gas Fuels

Yuvenda

Sudarmanta

Wahjudi

et al. 2022

Int. J. Renew. Energy Dev.

View full text Add to dashboard Cite

show abstract

“…Concurrently, the RNG k-model was implemented to model turbulence predicated on. The collision model, along with the TAB breakup model, are applied to the spray [18]. Due to the difficulty of the problem, only a 60° sector of the model was defined utilizing 3D software, as shown in Figure 2.…”

Section: Numerical Modellingmentioning

confidence: 99%

Impacts of Varied Injection Timing on Emission Levels, Combustion Efficiency, and Performance of Biodiesel Engines

Mahmood,

Attia,

Al-Sulttani

et al. 2023

MMEP

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Numerous studies have aimed to optimize fuel economy and minimize pollutants during the transition from diesel to biodiesel engines. However, a conspicuous void in these studies is the determination of optimal injection timing for biodiesel fuel. This oversight can culminate in escalated emission levels, increased brake-specific fuel consumption, and potential engine knocking. The present study seeks to address this gap by examining the combustion efficiency of biodiesel engines under six distinct fuel injection timings (320, 325, 330, 335, 340, and 345). Biodiesel fuel combustion was simulated using the ANSYS FLUENT software, with numerical simulations performed on the AV1 (Kirloskar) diesel engine operating at an engine speed of 1500 rpm, utilizing biodiesel as a diesel fuel substitute. The simulation results revealed that advancing the start of fuel injection augments the combustion characteristics of the biodiesel engine. Conversely, retarding the start of fuel injection resulted in a decrease in both the NOx and CO fractions. In particular, CO mass fraction values within the engine demonstrated a decrease from 0.133743891 to 0.004889395 for fuel injection timings of 40 BTC to 20 BTC respectively. Similarly, nitric oxide mass fraction levels within the engine were observed to decline from 0.015367293 to 1.13664E-34 for fuel injection timings from 40 BTC to 20 BTC respectively. These findings shed light on the pivotal role of injection timing in enhancing the performance and reducing the emission levels of biodiesel engines.

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A review of the hydrogen fuel path to emission reduction in the surface transport industry

Roy¹,

Pramanik

2024

International Journal of Hydrogen Energy

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Impact of Lambda Value on Combustion Characteristics and Emissions of Syngas-Diesel Dual-Fuel Engine

Cited by 4 publications

References 22 publications

Effect of Adding Combustion Air on Emission in a Diesel Dual-Fuel Engine with Crude Palm Oil Biodiesel Compressed Natural Gas Fuels

Effect of Adding Combustion Air on Emission in a Diesel Dual-Fuel Engine with Crude Palm Oil Biodiesel Compressed Natural Gas Fuels

Impacts of Varied Injection Timing on Emission Levels, Combustion Efficiency, and Performance of Biodiesel Engines

A review of the hydrogen fuel path to emission reduction in the surface transport industry

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