Performance and emission characteristics of a diesel engine fueled with functionalized multi-wall carbon nanotubes (MWCNTs-OH) and diesel–biodiesel–bioethanol blends

Shekofteh, Mohammad; Gundoshmian, Tarahom Mesri; Jahanbakhshi, Ahmad; Heidari-Maleni, Aram

doi:10.1016/j.egyr.2020.05.025

Cited by 68 publications

(18 citation statements)

References 37 publications

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“…To cope with the impending fuel crisis, the replacement of reducing oil reserves by renewable fuels such as biodiesel has become a fascinating option for technological advancement. Another study using biodiesel blends with carbon nanotube nanoparticles exhibited noteworthy curtailment in harmful exhausts, including NO x [9]. Another effort from the viewpoint of fume pollutant reduction used various biodiesel-diesel blends and exhaust gas recirculation techniques and culminated in a 25-75% reduction in emissions [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Al2O3 Nanoparticles on Performance and Emission Characteristics of Diesel Engine Fuelled with Diesel–Neem Biodiesel Blends

et al. 2022

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Indagation in the sphere of nanoparticle utilisation has provided commendatory upshots in discrete areas of application varying from medicinal use to environmental degradation alleviation. This study incorporates alumina nanoparticles as additives to diesel and biodiesel blends. The prime objective of the present study was the scrutinisation of the denouement of Al2O3 nanoparticle incorporation in diesel–biodiesel blends on a diesel engine’s performance and emission characteristics. Test fuel samples were prepared by blending different proportions of biodiesel and dispersing two concentrations of alumina nanoparticles (25 and 50 ppm) in the diesel. Dispersion was made without the use of a nanoparticle stabiliser to meet real-world feasibility. High-speed shearing was employed to blend the biodiesel and diesel, while nanoparticles were dispersed in the blends by ultrasonication. The blends so devised were tested using a single-cylinder diesel engine at fixed RPM and applied load for three compression ratios. Upshots of brake-specific fuel consumption (BSFC) and brake thermal efficiency (BTE) for fuel samples were measured with LabView-based software, whereas CO emissions and unburnt hydrocarbon (UBHC) emissions were computed using an external gas analyser attached to the exhaust vent of the engine. Investigation revealed that the inclusion of Al2O3 nanoparticles culminates in the amelioration of engine performance along with the alleviation of deleterious exhaust from engine. Furthermore, the incorporation of alumina nanoparticles assisted in the amelioration of dwindled performance attributed to biodiesel blending. More favourable results of nanoparticle inclusion were obtained at higher compression ratios compared to lower ones. Reckoning evinced that the Al2O3 nanoparticle is a lucrative introduction for fuels to boost the performance and dwindle the deleterious exhaust of diesel engines.

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Section: Introductionmentioning

confidence: 99%

Effect of Al2O3 Nanoparticles on Performance and Emission Characteristics of Diesel Engine Fuelled with Diesel–Neem Biodiesel Blends

et al. 2022

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“…The distinct characteristic peaks located at 1410, 1040, and 875 cm −1 stemmed from the stretching vibrations of ─C═O and C─OH bonds in carboxyl groups and C─O bonds in epoxide groups, respectively. [ 33 ] Based on this infrared analysis, it can be inferred that the hydrophobic surfaces of MWCNTs were functionalized by hydrophilic hydroxyl groups, which rendered this nanofiller hydrophilic.…”

Section: Resultsmentioning

confidence: 99%

Surface wettability, tensile mechanical performance, and tribological behavior of polyimide/polytetrafluoroethylene blends enhanced with hydroxylated multiwalled carbon nanotubes at high relative humidity

Yan

Xue

2021

Polymer Composites

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Multiwalled carbon nanotubes were hydroxylated (MWCNTs-OH) by a strong acid mixture and then used as a reinforcement nanofiller in blends of polytetrafluoroethylene (PTFE) and polyimide (PI) to fabricate MWCNTs-OH/ PTFE/PI nanocomposites. The influences of MWCNTs-OH additions on the surface wettability, tensile mechanical property, and tribological behaviors of MWCNTs-OH/PTFE/PI nanocomposites under different relative humidity were investigated. Test results indicate that the introduction of MWCNTs-OHcan dramatically decrease the static water contact angles and increase the tensile strengths and elastic moduli of the PTFE/PI polymer blends. This is largely due to the existence of numerous hydrophilic functional groups on the surfaces of MWCNTs-OH and its ultrahigh mechanical characteristics. The relative humidity has a much weaker impact on the friction coefficients of the MWCNTs-OH/PTFE/PI nanocomposites than on the wear rates. Of all composites, the 0.8 wt% MWCNTs-OH/PTFE/PI nanocomposite possesses the lowest friction coefficient (0.11) and wear rate (2.97 Â 10 À15 m 3 /(Nm)) at a high relative humidity of 90%. The conspicuous increase in wear resistance is attributable to the enhancement effect of MWCNTs-OH and the generation of homogeneous polymer self-lubricating tribofilms.

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“…Explosions are reported with the extraction of crude oil for fossil fuels and many aquatic reserves can be polluted during extraction, posing a damaging effect to sea-life [70], thus extraction of biofuels is far less damaging to the local environment. Biofuels tend to burn cleaner, the increased use of biodiesel and ethanol blends in vehicle engines, causes a reduction in PM, CO and unburned VOC emissions than traditional fuels [53,54,71,72]. The main explanation for these reduced emissions within literature is that the higher oxygen content of ethanol and biodiesel, compared with petrol and diesel [73,74], leads to a more complete combustion and hence a decrease in particulate content and exhaust gas [11].…”

Section: Environmental Impact Of Biofuel Usementioning

confidence: 99%

Investigation of Biofuel as a Potential Renewable Energy Source

et al. 2021

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An accelerating global energy demand, paired with the harmful environmental effects of fossil fuels, has triggered the search for alternative, renewable energy sources. Biofuels are arguably a potential renewable energy source in the transportation industry as they can be used within current infrastructures and require less technological advances than other renewable alternatives, such as electric vehicles and nuclear power. The literature suggests biofuels can negatively impact food security and production; however, this is dependent on the type of feedstock used in biofuel production. Advanced biofuels, derived from inedible biomass, are heavily favoured but require further research and development to reach their full commercial potential. Replacing fossil fuels by biofuels can substantially reduce particulate matter (PM), carbon monoxide (CO) emissions, but simultaneously increase emissions of nitrogen oxides (NOx), acetaldehyde (CH3CHO) and peroxyacetyl nitrate (PAN), resulting in debates concerning the way biofuels should be implemented. The potential biofuel blends (FT-SPK, HEFA-SPK, ATJ-SPK and HFS-SIP) and their use as an alternative to kerosene-type fuels in the aviation industry have also been assessed. Although these fuels are currently more costly than conventional aviation fuels, possible reduction in production costs has been reported as a potential solution. A preliminary study shows that i-butanol emissions (1.8 Tg/year) as a biofuel can increase ozone levels by up to 6% in the upper troposphere, highlighting a potential climate impact. However, a larger number of studies will be needed to assess the practicalities and associated cost of using the biofuel in existing vehicles, particularly in terms of identifying any modifications to existing engine infrastructure, the impact of biofuel emissions, and their chemistry on the climate and human health, to fully determine their suitability as a potential renewable energy source.

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Performance and emission characteristics of a diesel engine fueled with functionalized multi-wall carbon nanotubes (MWCNTs-OH) and diesel–biodiesel–bioethanol blends

Cited by 68 publications

References 37 publications

Effect of Al2O3 Nanoparticles on Performance and Emission Characteristics of Diesel Engine Fuelled with Diesel–Neem Biodiesel Blends

Effect of Al2O3 Nanoparticles on Performance and Emission Characteristics of Diesel Engine Fuelled with Diesel–Neem Biodiesel Blends

Surface wettability, tensile mechanical performance, and tribological behavior of polyimide/polytetrafluoroethylene blends enhanced with hydroxylated multiwalled carbon nanotubes at high relative humidity

Investigation of Biofuel as a Potential Renewable Energy Source

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