A study of the spray ignition characteristics of hydro-processed renewable diesel, petroleum diesel, and biodiesel using a constant volume combustion chamber

Alhikami, Akhmad Faruq; Yao, Chia En; Wang, Wei Cheng

doi:10.1016/j.combustflame.2020.09.033

Cited by 29 publications

(10 citation statements)

References 26 publications

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“…A lower H/C ratio leads to more unsaturated hydrocarbons such as olefins and aromatics results in the increases in soot formation 20 . The supposition was also supported by a previous study 53,54 finding that more complete combustion is achieved by a fuel with a higher H/C ratio. As a result, complete combustion was achieved and reduced the sooting propensities of the fuels under consideration 55 .…”

Section: Resultsmentioning

confidence: 67%

Experimental studies of soot formation for petro‐ and renewable diesels

Alhikami

Wang

Nugroho

et al. 2022

Intl J of Energy Research

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Summary The soot formation characteristics of hydro‐processed renewable diesel (HRD), biodiesel, and petroleum diesel were studied in a non‐premixed counter‐flow laminar flame configuration. This investigation is discussed herein in terms of soot morphology, soot volume fraction (SVF), smoke point (SP), and threshold sooting index (TSI) measurements. It was found that both alternative diesel fuels (ie, HRD, and biodiesel) were similar in terms of the soot particle diameter, whereas petroleum diesel was found to exhibit the greatest soot particle formation. Additionally, the soot particle diameter and SVF were both sensitive to the variations of the reactant concentration by as much as 28%, and 86%, respectively. The sooting tendencies of the tested fuels were found to be proportional to their respective aromatic concentrations. In addition, the fuel containing higher hydrogen‐to‐carbon ratio (ie, HRD) had a lower SVF. The TSI indices reported that both HRD and biodiesel had a similar tendency to form soot, and the highest TSI index was petro‐diesel. The SVF has good correlations with the SP results.

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Section: Resultsmentioning

confidence: 67%

Experimental studies of soot formation for petro‐ and renewable diesels

Alhikami

Wang

Nugroho

et al. 2022

Intl J of Energy Research

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“…Interestingly, it was revealed that HRR max decreased with an increase in the CR. Higher fuel P inj at higher CR might cause incomplete combustion and low fuel economy due to higher fuel impingement and an increased late combustion phase [39]. At CR 17.5 and without EGR, HRR max decreased with the increase in the EGR flow rate for both the test fuels (figure 10(b)).…”

Section: In-cylinder Pressure and Hrrmentioning

confidence: 95%

“…At CR 17.5 and without EGR, HRR max decreased with the increase in the EGR flow rate for both the test fuels (figure 10(b)). The exhaust gas dilution effect reduced the cylinder temperature and slowed down the rate of fuel burnt, thus resulting in a reduced HRR max [39,40]. The effect of EGR dilution on HRR max was minimal due to the rise in in-cylinder temperature at higher CRs [40,41].…”

Section: In-cylinder Pressure and Hrrmentioning

confidence: 99%

“…On the other hand, at CR 20, the HRR for FMME-2 fuel with EGR flow rate was found to be greater than HRR for no-EGR fuel (figures 12(d)-(f)). This was due to EGR's dilution effect, which decreased the in-cylinder temperature and lengthened the ID time [39,43]. Because of the longer ID duration, more fuel may be burned in the pre-mixed combustion phase, resulting in a higher HRR, although it is still lower than that of diesel due to the lower HHV.…”

Section: In-cylinder Pressure and Hrrmentioning

confidence: 99%

“…With an increase in the EGR rate, the HRR for FMME-2 fuel rose (figures 12(g)-(i)). The effect of EGR was minor at a higher CR of 22 because of the increased in-cylinder temperature [39,43].…”

Section: In-cylinder Pressure and Hrrmentioning

confidence: 99%

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Sustainable biodiesel from flex-mix feedstock and its combustion in a VCR-CRDI engine with variable exhaust gas recirculation and injection pressure

Sharma¹,

Hossain²,

Duraisamy³

et al. 2022

J. Phys. Energy

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Biodiesel produced from single feedstocks has many challenges due to variations in the oil properties. Flex-mix approach is a long-term solution for turning mixed feedstock into high-quality biodiesels. In this investigation, a premixed used cooking oil and animal fat (pig fat) mixture (from 20-80%) was transesterified to produce flex-mix methyl ester (FMME). The FMME fuel characteristics were tested and compared to biodiesel standards. Generally, biodiesel emits higher oxides of nitrogen (NOx) gas due to the presence of high unsaturation compounds and oxygen. The present study aimed to address this issue by adopting the flex-mix approach in combination with fuel injection strategies (400, 500 and 600 bar), exhaust gas recirculation (EGR-10%, 20% and 30%) and variable compression ratio (CR 17.5:1, 20:1 and 22:1). At a CR of 22 and injection pressure (Pinj) 600 bar, the FMME fuel without EGR shows a minimum reduction in brake thermal efficiency (BTE) of 0.15 % when compared to diesel. Nitric oxide (NO) gas emissions decreased by nearly 50% for all Pinj and EGR, but they rose when the CR was increased to 20 and 22. Smoke and hydrocarbon (HC) emissions also increased with exhaust gas proportion. The engine performance with FMME fuel was found to be equivalent to fossil diesel fuel. According to the findings, the flex-mix approach could be a long-term alternative to producing renewable fuel for off-road diesel engines application.

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Heating, Evaporation and Autoignition of Sprays

Sazhin

2022

Droplets and Sprays: Simple Models of Complex Processes

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A study of the spray ignition characteristics of hydro-processed renewable diesel, petroleum diesel, and biodiesel using a constant volume combustion chamber

Cited by 29 publications

References 26 publications

Experimental studies of soot formation for petro‐ and renewable diesels

Experimental studies of soot formation for petro‐ and renewable diesels

Sustainable biodiesel from flex-mix feedstock and its combustion in a VCR-CRDI engine with variable exhaust gas recirculation and injection pressure

Heating, Evaporation and Autoignition of Sprays

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