Hexanol: A renewable low reactivity fuel for RCCI combustion

Thomas, John J.; Sabu, V.R.; Basrin, G.; Nagarajan, G.

doi:10.1016/j.fuel.2020.119294

Cited by 10 publications

(4 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The CO levels were higher at 100% load owing to increased fuel supply per cycle and a shorter oxidation residence time. CO formation is also influenced by fuel parameters such as density, viscosity, and CN [18,35]. Spray penetration, atomization, and dispersion of high droplet size are all affected by viscosity [26,35].…”

Section: Exhaust Gas Emissionsmentioning

confidence: 99%

“…CO formation is also influenced by fuel parameters such as density, viscosity, and CN [18,35]. Spray penetration, atomization, and dispersion of high droplet size are all affected by viscosity [26,35]. Because of the larger fuel droplet size and low injection pressure, incomplete combustion occurred, resulting in increased CO emissions [26].…”

Section: Exhaust Gas Emissionsmentioning

confidence: 99%

“…Meanwhile, in group II, palm biodiesel (SFA) gave lower CO 2 emission by about 4.3% at 0% load, 5% at 50% load, and 1% at 100% load than karanja and WCOB, respectively (Figure 10). Lower viscosity and higher CN of SFA fuels helped to improve the combustion efficiency, which resulted in lower CO 2 emissions (Table 4) [13,35].…”

Section: Exhaust Gas Emissionsmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Investigation of Neat Biodiesels’ Saturation Level on Combustion and Emission Characteristics in a CI Engine

2021

View full text Add to dashboard Cite

The fuel qualities of several biodiesels containing highly saturated, mono, and poly unsaturated fatty acids, as well as their combustion and exhaust emission characteristics, were studied. Six biodiesel samples were divided into two groups based on their fatty acid composition, including group 1 (coconut, castor, and jatropha) and group II (palm, karanja, and waste cooking oil biodiesel). All fuels (in both groups) were tested in a single-cylinder off-road diesel engine. Castor and karanja biodiesel, both rich in mono-unsaturation level, have a high viscosity of about 14.5 and 5.04 mm2/s, respectively. The coconut and palm biodiesels are rich in saturation level with cetane numbers of 62 and 60, respectively. In both groups, highly saturated and poly-unsaturated methyl esters presented better combustion efficiency and less formation of polluted emissions than mono-unsaturation. At full load, coconut and palm biodiesel displayed 38% and 10% advanced start of combustion, respectively, which reduced ignition delay by approximately 10% and 3%, respectively. Mono-unsaturated methyl esters exhibited a higher cylinder pressure and heat release rate, which results in higher NOx gas emissions. The group II biodiesels showed about 10–15% lower exhaust emissions owing to an optimum level of fatty acid composition. Our study concluded that highly saturated and poly-unsaturated fatty acid performed better than mono-unsaturated biodiesels for off-road engine application.

show abstract

Section: Exhaust Gas Emissionsmentioning

confidence: 99%

Section: Exhaust Gas Emissionsmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Investigation of Neat Biodiesels’ Saturation Level on Combustion and Emission Characteristics in a CI Engine

2021

View full text Add to dashboard Cite

show abstract

“…Under this perspective, recently, 1-hexanol (HexOH) and hexyl hexanoate (HexHex) have been proposed as bio-additives for Diesel engines. Regarding HexOH, several works have employed it in blendstock with Diesel, studying the effect on combustion performance and emission characteristics under the direct-injection mode [22][23][24] but also under the reactivity-controlled compression (RCCI) mode [25]. On the other hand, the influence of injection timing and exhaust gas recirculation on engine performance has also been investigated [26,27], and some more in-depth aspects, such as the kinetics of internal combustion [28] and the optical diagnostic of spray, combustion, and flame characteristics [21], have been considered.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of 1-Hexanol/Hexyl hexanoate Mixtures from Grape Pomace: Insights on Diesel Engine Performances at High Bio-Blendstock Loadings

Frigo,

Raspolli Galletti,

Fulignati

et al. 2023

Energies

View full text Add to dashboard Cite

The production of oxygenated bio-additives for traditional fuels represents a key challenge due to their depletion in the near-future and their positive contribution to the reduction in environmental pollution. The present study considers the synthesis of 1-hexanol/hexyl hexanoate mixtures, two oxygenated Diesel bio-additives produced through the hydrogenation of hexanoic acid, obtainable from the fermentation of a wide variety of waste biomasses. In our case, crude hexanoic acid was produced through the fermentation of grape pomace, an abundant Italian agrifood waste. Commercial 5 wt% Re/γ-Al2O3 was adopted for the catalytic hydrogenation of crude hexanoic acid, and the support acidity allowed the tuning of the reaction selectivity toward the formation of hexyl hexanoate, instead of 1-hexanol, reaching yields of 40 and 25 mol%, respectively. The effects of each bio-additive on Diesel engine performance and exhaust emissions (soot, nitrogen oxides, carbon monoxide, unburned hydrocarbons) were evaluated, highlighting noteworthy positive effects especially on the reduction in carbon monoxide and soot emissions, if compared with those of Diesel fuel alone. Similar promising performances were achieved by employing Diesel blend mixtures of 1-hexanol/hexyl hexanoate, mimicking typical compositions of the rhenium-catalyzed post-hydrogenation mixtures. Even in such cases, 1-hexanol/hexyl hexanoate mixtures can be blended with commercial Diesel fuel, up to high loadings currently not yet investigated (20 vol%), without altering the engine performances and, again, significantly lowering soot and carbon monoxide emissions by more than 40%. This work highlights the possibility of obtaining such oxygenated bio-additives starting from waste through to a fully sustainable process and proves their beneficial effects on the reduction in exhaust emissions with no changes in engine performance.

show abstract

Study of combustion and emission characteristics of a diesel engine fueled with diesel, butanol-diesel and hexanol-diesel mixtures under low intake pressure conditions

Yan

Gao

Zhao

et al. 2021

Energy Conversion and Management

View full text Add to dashboard Cite

Hexanol: A renewable low reactivity fuel for RCCI combustion

Cited by 10 publications

References 28 publications

Experimental Investigation of Neat Biodiesels’ Saturation Level on Combustion and Emission Characteristics in a CI Engine

Experimental Investigation of Neat Biodiesels’ Saturation Level on Combustion and Emission Characteristics in a CI Engine

Synthesis of 1-Hexanol/Hexyl hexanoate Mixtures from Grape Pomace: Insights on Diesel Engine Performances at High Bio-Blendstock Loadings

Study of combustion and emission characteristics of a diesel engine fueled with diesel, butanol-diesel and hexanol-diesel mixtures under low intake pressure conditions

Contact Info

Product

Resources

About