The effect of natural and synthetic antioxidants on the oxidative stability of palm diesel

Liang, Yung Chee; May, Choo Yuen; Foon, Cheng Sit; Ngan, Ma Ah; Hock, Chuah Cheng; Basiron, Yusof

doi:10.1016/j.fuel.2005.09.003

Cited by 225 publications

(129 citation statements)

References 13 publications

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“…Thus, biodiesel needs more dose of residue root extract to achieve oxidative stability goal. The changes in DPPH pattern with addition of natural antioxidants confirm the protective effects which is attributed to high levels of phenolic compounds and collected results agreed with Ling et al (2006).…”

Section: Dpph Methods For Biodiesel With Jatropha Residue Of Root Extrsupporting

confidence: 80%

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Protection of biodiesel and oil from degradation by natural antioxidants of Egyptian Jatropha

Diwani

Rafie

Hawash

2009

Int. J. Environ. Sci. Technol.

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AB STRACT:Residue of methanolic extract of Egyptian Jatropha curcas contains bioactive substances such as phenolic compounds, which succeeded to be used as natural antioxidants for the protection of oils and their corresponding biodiesel against oxidative deterioration. In the present work, the residue of Jatropha roots were extracted with methanol and resulting residues, were investigated regarding their content of total phenolic compounds by folin-Cioalteau assay. Further, the antioxidant activities of the extracts were characterized by the 2,2-diphenyl-1-picrylhydrazyl radical method and proved remarkable results. Oxidation stability of Jatropha oil, used fried oil and olive oil and their corresponding biodiesel obtained by conventional transesterification were tested using thermal oxidation. Natural antioxidants such as (α-trocopherol), synthetic antioxidants as butylated hydroxytoluene and natural Jatropha root extract were used in the present study in comparison to investigate their addition effect on the oxidative stability of oils and their corresponding biodiesel. In the rapied thermal treatment test, results showed that addition of butylated hydroxytoluene 0.25 % was able to stabilize Jatropha oil 6 h, but poorly stabiliz biodiesel. Addition of 0.25 % α-trocopherol to Jatropha oil showed less oxidation stability after 2 h thermal treatment. Crude root extract addition at 0.25% to Jatropha oil showed good stability up to 4 h thermal treatment while addition of root extract at 0.25 % to biodiesel showed better stability up to 6 h thermal treatment. Besides addition of 220 ppm crude root extract to biodiesel was enough sufficient to occure oxidative stabilization. Also Jatropha root residue addition at 400 ppm was effective antioxidant for fresh Jatropha oil.

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Section: Dpph Methods For Biodiesel With Jatropha Residue Of Root Extrsupporting

confidence: 80%

“…It inhibits the formation of free radical and hence contributes to the stabilization of the lipid sample (Ling, 2006). Synthetic antioxidants such as butylated hydroxyl toluene (BHT), is effective in the protection of unsaturated fats and oils.…”

Section: Introductionmentioning

confidence: 99%

Protection of biodiesel and oil from degradation by natural antioxidants of Egyptian Jatropha

Diwani

Rafie

Hawash

2009

Int. J. Environ. Sci. Technol.

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“…Liang et al [28] reported that the antioxidant abilities of phenolic antioxidants depends on the number of -OH groups occupying 1, 2 or 1, 4 positions in the aromatic ring as well as the capacity and electronic characteristics of the ring substituent present. They explained that the active -OH groups provide protons which prevents formation of free radicals or interferes with propagation of free radical and hence reduce the speed of oxidation.…”

Section: Resultsmentioning

confidence: 99%

Effects of antioxidants on oxidation and storage stability of Croton megalocarpus biodiesel

Osawa

Sahoo

Onyari

et al. 2015

Int J Energy Environ Eng

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The effects of antioxidants and storage on oxidation stability of croton biodiesel and its blends with petro-diesel were determined using PetroOxy equipment. The biodiesel and blends were kept in Pyrex reagent bottles and stored in a metallic locker at room temperature for 8 weeks, a condition that imitated ordinary storage environment in tanks before use. The oxidation stability indices of the biodiesel and blends were determined by measuring Rancimat induction periods for 8 weeks at intervals of 2 weeks. Although the Rancimat induction period for freshly prepared biodiesel of 4 h was higher than the commonly used American standard (ASTM D6751) limit of 3 h, it was lower than the European standard (EN 14214) of 6 h. The induction periods of B50 and lower blends were, however, equal to or greater than 6 h. The Rancimat induction periods for biodiesel with 100 ppm antioxidants were 5.6, 6.8 and 7.8 h for Butylated hydroxyanisol (BHA), Propyl gallate (PRG) and Pyrogallol (PYG), respectively, while the Rancimat induction periods for biodiesel with 1000 ppm antioxidants were 6.8, 8.2 and 10 h for BHA, PRG and PYG, respectively. The oxidation stability index for neat biodiesel decreased by 45 % while that for biodiesel with 1000 ppm antioxidants depreciated by 16, 12.2 and 20.59 % for PYG, PRG and BHA, respectively, during the 8-week storage period. A more rapid decline in oxidation stability was observed in the biodiesel and blends without antioxidants than those with antioxidants. The results from this study showed that the use of appropriate concentrations of suitable antioxidants can greatly improve the oxidation stability of biodiesel and blends which can therefore be stored over longer periods of time before use without undergoing extensive and deleterious oxidative deterioration.Keywords Croton biodiesel Á Oxidation stability Á Antioxidants Á Storage stability

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“…The influence of Oxidative stability of palm biodiesel by adding natural and synthetic antioxidants additive were investigated experimentally [37,38]. The experimental study conducted on the crude and distilled methyl esters of palm oil and found that crude palm oil has better oxidative stability.…”

Section: Effect Chemical Additives On Oxidation Stabilitymentioning

confidence: 99%

Effects of different chemical additives on biodiesel fuel properties and engine performance. A comparison review

Ali

Mamat

Abdullah

et al. 2016

MATEC Web of Conferences

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Abstract. Biodiesel fuel can be used as an alternative to mineral diesel, its blend up to 20% used as a commercial fuel for the existing diesel engine in many countries. However, at high blending ratio, the fuel properties are worsening. The feasibility of pure biodiesel and blended fuel at high blending ratio using different chemical additives has been reviewed in this study. The results obtained by different researchers were analysed to evaluate the fuel properties trend and engine performance and emissions with different chemical additives. It found that, variety of chemical additives can be utilised with biodiesel fuel to improve the fuel properties. Furthermore, the chemical additives usage in biodiesel is inseparable both for improving the cold flow properties and for better engine performance and emission control. Therefore, research is needed to develop biodiesel specific additives that can be adopted to improve the fuel properties and achieve best engine performance at lower exhaust emission effects.

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The effect of natural and synthetic antioxidants on the oxidative stability of palm diesel

Cited by 225 publications

References 13 publications

Protection of biodiesel and oil from degradation by natural antioxidants of Egyptian Jatropha

Protection of biodiesel and oil from degradation by natural antioxidants of Egyptian Jatropha

Effects of antioxidants on oxidation and storage stability of Croton megalocarpus biodiesel

Effects of different chemical additives on biodiesel fuel properties and engine performance. A comparison review

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