Exergy, energy, performance, and combustion analysis for biodiesel NOx reduction using new blends with alcohol, nanoparticle, and essential oil

Journal of Cleaner Production, Год журнала: 2024, Номер 467, С. 142968 - 142968

Опубликована: Июнь 20, 2024

Biodiesel is considered one of the alternative replacements to fossil fuels. However, major challenge associated with its application in diesel engines higher level NOx emissions. Fuel modification technologies, where biodiesel blended various additives and fuels, have emerged as a distinguished method recent years improve engine performance reduce NOx. The study aims emissions by fuel techniques. Five blends were prepared using Tucuma along ethanol, carbon nanotubes, eucalyptus oil. deployed test bed at rated speed varying loads investigate performance, emission, combustion characteristics. results revealed that ethanol-blended fuels such DE10 TB10E10 had reduced 51.37% 9%, respectively, lower compared diesel. Although nanoparticle blend exhibited increased diesel, it demonstrated reductions 4.1%, 4.56%, 7.2%, 3.1% 25%, 50%, 75%, 100%, TB10. highlights tradeoffs observed between operating conditions parameters for blends, detailed this research. found TB10E10CNT20 exhibit improved close CO recommends further exploring impact injection rates they showed longer ignition delays since advancing can create better ethanol blends.

Язык: Английский

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Extraction and characterization of Cucumis melon seeds (Muskmelon seed oil) biodiesel and studying its blends impact on performance, combustion, and emission characteristics in an internal combustion engine

Energy Conversion and Management X, Год журнала: 2024, Номер 23, С. 100637 - 100637

Опубликована: Май 28, 2024

This study examines the performance, combustion, and emissions characteristics of a single-cylinder internal combustion diesel engine when fueled with blend biodiesel derived from muskmelon seeds. The kinematic viscosity extracted seed oil was 6.1 cSt at 40 °C, which is higher than petroleum 2.6 cSt. Muskmelon further analyzed using thin-layer chromatography (TLC) high-voltage separator tests. A comparison fuel properties conventional revealed that could be used alone or in diesel–biodiesel to compression engines. In this study, blended proportions 10 %, 20 50 % (BD10, BD20, BD50, respectively). At relatively low rotational speed 1200 rpm, brake thermal efficiency (BTE) operated BD10 BD20 blends were 36.1 36.0 respectively, while brake-specific consumption (BSFC) two 0.260 kg/kWh, 0.262 respectively. These values closely resemble those typically observed Indeed, average BTE only 3.24 less fuel. Diesel generates NOx SO2 compared blends: BD100 emitted most pollution all fuels tested. addition, released significantly more other However, outperformed terms CO, NOx, high speeds. exception H2S emissions, BD50 BD100. also exhibited reduced CO fuel, blends. Our findings best performance lower among words, ideal for use engines does not require any alterations engine. waste seeds represent non-edible stream can exploited production allowing upcycling potentially problematic thermochemical conversion feedstock. valuable energy sector address wastefulness associated particular stream.

Язык: Английский

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Effects of Oxygen Enrichment and Air Humidification on the Combustion and Emissions of the Biodiesel Marine Diesel Engine

Journal of Marine Science and Engineering, Год журнала: 2025, Номер 13(2), С. 271 - 271

Опубликована: Янв. 31, 2025

With increasingly strict emission regulations, research on diesel engine combustion and emissions is urgently needed. This study conducted computational fluid dynamics modeling engines. The effects of intake humidity oxygen concentration a the biodiesel were studied. results indicate that when ratio below 0.4 (WR = 0.4), humidification has certain promoting effect reaction process. Water molecule pyrolysis can promote biodiesel, peak pressure in cylinder slightly increases. As increases, temperature decreases, also decreases due to increase water molecular weight. process suppressed, decreases. When 1 1), by 2.61% compared it not humidified 0). O radicals with an ratio. WR 1.0, NOx decreased 55.02%, but decrease high-temperature area, soot increased. as average increase, ignition-delay time heat-release rate ultimately leads emissions.

Язык: Английский

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Advanced Numerical Analysis of In-Cylinder Combustion and NOx Formation Using Different Chamber Geometries

Fire, Год журнала: 2024, Номер 7(2), С. 35 - 35

Опубликована: Янв. 24, 2024

In diesel engines, emission formation inside the combustion chamber is a complex phenomenon. The events occur in microseconds, affecting overall engine performance and emissions characteristics. This study opted for using computational fluid dynamics (CFD) to investigate patterns how these affect nitrogen oxide (NOx) emissions. this study, model with flat (FCC) was developed simulation. simulation result of heat release rate (HRR) cylinder pressure validated experimental test data (the conducted at 1500 rpm full load conditions). its respective boundary conditions were used effect modified profiles on NOx Modified chambers, such as bathtub (BTCC) shallow depth (SCC), developed, their analysed respect FCC. revealed that fuel distribution, unburnt mass fractions, temperature turbulent zones directly impact chambers controlled spread provided better improving rates. SCC (63.2 bar) showed peak rates compared FCC (63.02 BTCC (62.72 bar). concluded results than other chambers. further recommends conducting lean mixture modifications optimising spray, by adjusting injection profile, spray angle timing, which has tendency create complete combustion.

Язык: Английский

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Design and Simulation of the Biodiesel Process Plant for Sustainable Fuel Production

Sustainability, Год журнала: 2024, Номер 16(8), С. 3291 - 3291

Опубликована: Апрель 15, 2024

The biodiesel production process is extensively studied in the literature, focusing on mechanisms, modeling, and economic aspects, yet plant design fluid flow losses remain underexplored areas. study addressed this gap by designing a plant, analyzing losses, developing pipe network suitable pump models. In study, an integration of simulation continuous Calophyllum inophyllum was investigated. Biodiesel encompasses complex stages that involve systematic planning system design. goal to reduce occur during conversion process, which can capital cost plant. A few assumptions were made when selecting materials, such as pipes, pumps, fittings, bends. These based considerations properties pressure requirements. On other hand, Aspen Plus used simulate process. considered oil feedstock inputted triglyceride composition. carried out with rigorous kinetic reactions using Non-Random Two-Liquid (NRTL) method predict liquid equilibrium reactor. Results revealed designed steel meets safety requirements bursting 49.68MPa, capable withstanding maximum 4 bar turbulent conditions. Additionally, selected satisfies required head rate, ensuring efficient movement. Moreover, results closely matched experimental data, 88% yield recorded.

Язык: Английский

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Melting heat transfer and entropy analysis of ternary Casson nanofluids flow with second slip conditions: Application on rocket engine cooling

Alexandria Engineering Journal, Год журнала: 2024, Номер 102, С. 10 - 25

Опубликована: Июнь 4, 2024

Heat transfer analysis of Casson nanofluid flow with single and multi-walled carbon nanotubes Al2O3 or GO nanoparticles, which are suspended in kerosene oil, is elucidated. The impact second slip conditions on the system's velocity, temperature, solutal considered, along effect melting heat nanoparticle shape factor. appraisal's novelty incorporation oil containing new three distinct nanoparticles. Similar variables used to convert governing equations into ordinary then solved using homotopy perturbation method (HPM). profiles concentration, Bejan number estimated for various values relevant parameters. Results demonstrate that declines due enhance first thermal parameter velocity parameter, while contrary tendency examined by raising fluid parameter. Al2O3-SWCNT-MWCNT TNF responds more strongly than GO-SWCNT-MWCNT when temperature coupled (nanoparticles volume fraction, parameter), axial This study help rocket engine designers identify optimal nanofluids cooling fuel.

Язык: Английский

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Experimental investigation on diesel engine performance, combustion, and emissions characteristics with Tucuma and Ungurahui biodiesel blends

Fuel, Год журнала: 2024, Номер 371, С. 132161 - 132161

Опубликована: Июнь 9, 2024

Язык: Английский

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A numerical investigation on the effect of altering compression ratio, injection timing, and injection duration on the performance of a diesel engine fuelled with diesel-biodiesel-butanol blend

Clean Energy, Год журнала: 2024, Номер 8(5), С. 73 - 96

Опубликована: Июль 10, 2024

Abstract Using renewable fuels for diesel engines can reduce both air pollution and dependence on fossil fuels. A computer simulation was constructed to predict the performance, combustion characteristics, NOx emissions of a engine fuelled with diesel–biodiesel–butanol blends. The validated by comparing modelling results against experimental data good agreement between found. used validation were (B0), biodiesel (B100), diesel–biodiesel blend (B50), two blends 45% diesel–45% biodiesel–10% butanol (Bu10) 40% diesel–40% biodiesel–20% (Bu20) volume. Experimental showed that addition reduced but deteriorated performance. aim current work numerical optimization different parameters enhance performance while using decrease emissions. compression ratio (CR) varied from 14 24, in increments 2. Fuel injection timing (IT) 30° before top dead centre (bTDC) 5° bTDC 5°. Also, fuel duration (IDur) extended 20° 50° 10°. Results increase CR improved investigated fuels, Bu10 Bu20. maximum brake power (BP), thermal efficiency (BTE), minimum brake-specific consumption (BSFC) 1.46 kW, 32.3%, 0.273 kg/kWh respectively, obtained when injected under optimum conditions 24 CR, 15° IT, 40° IDur. Under these conditions, BP, BTE, BSFC 3%–3.5% Bu20 compared base 22, IDur, 10° IT. heat release rate during premixed phase increased IT advanced, mixing-controlled enhanced reduced. increasing an IDur at constant reduction decreased further 2.2% 0.9%, conditions. Reducing caused 16%. When 15°bTDC, 12.3% 11.8%, respectively. comparable those pure diesel,

Язык: Английский

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Study on the integration of hydrogen in a multi-cylinder low heat rejection diesel engine using a ternary blend

Atmospheric Pollution Research, Год журнала: 2024, Номер 15(10), С. 102250 - 102250

Опубликована: Июль 14, 2024

Язык: Английский

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Evaluating Ignition Improvers on Performance and Emissions of Calophyllum inophyllum Biodiesel in Turbocharged Diesel Engines

Results in Engineering, Год журнала: 2024, Номер unknown, С. 103664 - 103664

Опубликована: Дек. 1, 2024

Язык: Английский

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