Effect of additives on the oxidative stability and corrosivity of biodiesel samples derived from babassu oil and residual frying oil: An experimental and theoretical assessment

Rangel, Nelly Vanessa Pérez; Silva, Leonardo P. da; Pinheiro, Vinícius S.; Figueredo, Igor M.; Campos, Othon Souto; Costa, Stefane N.; Luna, Francisco; Cavalcante, Candice Torres de Melo Bezerra; Marinho, Emmanuel Silva; Lima‐Neto, Pedro de; Rios, Maria Alexsandra de Sousa

doi:10.1016/j.fuel.2020.119939

Cited by 22 publications

(19 citation statements)

References 52 publications

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“…The numerical values of these parameters are shown in Table III. Frequently, EHOMO is related to the molecule's reactivity 21 , given that this orbital contains the farthest electrons from the nucleus and, therefore, these are easily donated or shared. In this context, electrons from the HOMO level are more likely to be transferred to the empty orbitals (d-orbitals) at the metal surface.…”

Section: Resultsmentioning

confidence: 99%

Glycerol and malonic acid as corrosion inhibitors seen through the density functional theory perspective

Díaz‐Ballote

Maldonado-López

San-Pedro

et al. 2022

JSCS

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Glycerol (G) is the major co-product of biodiesel in the transesteri-fication process. As the clean energy demand increases, the G production also increases and new ways of re-using it are needed. In the last decade, some experimental studies claimed that G and its derivative, malonic acid (MA), could be used as corrosion inhibitors. Yet, at the present, there is few evidence of it and more studies are needed to confirm that G and MA would have a good performance in metal protection. The present work aims to study the reactivity of G and MA, since reactivity and inhibition are intimately linked. Density functional theory (DFT) at the B3YLP/6-31G++ level of theory was used to study both molecules? reactivity. The global and local quantum parameters derived are used to assess the reactivity of both molecules. Analysis of the calculated reactivity descriptors suggest that G and MA should exhibit an acceptable corrosion efficiency, but MA showed greater potential as corrosion inhibitor.

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Section: Resultsmentioning

confidence: 99%

Glycerol and malonic acid as corrosion inhibitors seen through the density functional theory perspective

Díaz‐Ballote

Maldonado-López

San-Pedro

et al. 2022

JSCS

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“…This is due to the B20 blend mode's lower burning temperature and greater rate of fuel ow, both with and without EGR. A rise in BSEC was also assisted by lower calori c values (Rangel et al 2021). Higher combustion temperatures and improved fuel usage result in improved fuel economy at high loads (Varuvel et al 2018).…”

Section: Brake Speci C Energy Consumptionmentioning

confidence: 99%

Thermal and Chemical Exhaust Gas Recirculation Potential of Punnai Oil Biodiesel Fuelled Diesel Engine For Environmental Sustainability

Bibin¹,

Devan²,

Sheeja³

et al. 2022

Preprint

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Pollution from diesel engines affects negatively the environment. As a result, there is a worldwide concern about reducing the pollutants emitted by diesel engines. In comparison to diesel fuel, biodiesel combustion produces reduced carbon monoxide (CO2) and unburned hydrocarbon (UHC) emissions, but higher nitrogen oxides (NOx) emissions. The current study is to investigate the thermal and chemical effect of exhaust gas recirculation (EGR) on features of a diesel engine for environmental sustainability. The punnai oil was produced from kernels of punnai seeds and transesterified in two phases using alcohol with the existence of a catalyst. The higher viscosity of punnai oil biodiesel is diluted by mixing it with diesel fuel. Our previous investigation indicated that neat punnai oil biodiesel is a potential fuel; however, the findings showed that the addition of diesel is necessary to obtain acceptable engine performance. In this study, punnai oil biodiesel was mixed at a rate of 20% with diesel (B20) and run in a diesel engine with varied EGR rates under five different engine loads. This combined impact enhanced the maximum heat release rate (HRR) and maximum combustion pressure, according to the findings. The premixed burning fractions were commonly higher at all engine loads, whereas the diffusion combustion fractions were lower. When the centre of the HRR changed toward the top dead centre (TDC), combustion durations remained rather constant. The experimental results revealed B20 blend at 10% EGR flow rate produced 6.57% lower BTE, 37.04% higher BSEC, 2.47% higher EGT, 5.13% lower CO, 31.11% higher CO2, 3.13% higher UHC, 8.36% lower NOx and 4% higher smoke opacity when compared with diesel in a standard diesel engine.

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“…This still subjects our climate to danger. However, additives with good antioxidative abilities are capable of putting an end to this anomaly (Rangel et al, 2020). Cashew nut shell liquid is a non-food byproduct obtained from the shell of cashew, anacardium occidentale, and it is always found at the pith of the sponge (Bastos and Tubino, 2017;Rangel et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Performance and Emission Characteristics of Compression Ignition Engine Running on a Blend of Cashew Nut Shell Liquid and Biodiesel Produced from Orange Peel

Adekanbi

Olugasa

Fasogbon

2022

EUR J SUSTAIN DEV RES

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This study evaluates the performance and emission characteristics of an orange peel biodiesel blended with cashew nut shell liquid. It investigates the efficacy of cashew nut shell liquid in reducing nitrogen oxide (NOX) emissions resulting from the combustion of the biodiesel, while optimizing its performance.The biodiesel was prepared via transesterification. It was obtained by reacting orange peel oil produced through Soxhlet extraction with methanol in the presence of NaOH. The biodiesel was blended with cashew nut shell liquid in the ratio 70%:30% (B70).Experimental results demonstrate that blending cashew nut shell liquid with orange peel biodiesel causes a slight decrease in NOX emission. B70 generates 150 ppm of NOX, while B100 and diesel produce 159 ppm and 193 ppm, respectively. The hydrocarbon emission of B70 was 8% lower than that of B100 and 22.3% lower than that of diesel. As regards CO and CO2 emission, B70 performs better than B100 and diesel. The performance parameters were computed at brake powers of 2.5 kW, 5.0 kW, 7.5 kW, and 10 kW. In comparison to diesel and B100, B70 has higher brake thermal efficiency at all loads. The brake specific fuel consumption (BSFC) of B70 is higher than that of diesel, but less than that of B100 at 2.5 kW and 5.0 kW. At 7.5 kW and 10 kW, the BSFC of B70 is higher than that of B100 and diesel. Conclusively, B70 gives optimal performance and less emission. Hence, cashew nut shell liquid is a good additive.

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Effect of additives on the oxidative stability and corrosivity of biodiesel samples derived from babassu oil and residual frying oil: An experimental and theoretical assessment

Cited by 22 publications

References 52 publications

Glycerol and malonic acid as corrosion inhibitors seen through the density functional theory perspective

Glycerol and malonic acid as corrosion inhibitors seen through the density functional theory perspective

Thermal and Chemical Exhaust Gas Recirculation Potential of Punnai Oil Biodiesel Fuelled Diesel Engine For Environmental Sustainability

Performance and Emission Characteristics of Compression Ignition Engine Running on a Blend of Cashew Nut Shell Liquid and Biodiesel Produced from Orange Peel

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