Blending effects of biodiesels on oxidation stability and low temperature flow properties

Park, Jiyeon; Kim, Deog-Keun; Lee, Joon-Pyo; Park, Soon-Chul; Kim, Young-Joo; Lee, Jin-Suk

doi:10.1016/j.biortech.2007.02.017

Cited by 307 publications

(126 citation statements)

References 17 publications

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“…Predictive oxidative stability was calculated, where possible, based on C18:2 and C18:3 content as suggested by [20], following Equation (11) …”

Section: Calculation Of Fuel Properties From Fatty Acid Profilesmentioning

confidence: 99%

“…Linolenate (C18:3) contains two bis-allylic groups and a limit of 12 wt% for this FAME has been set in the European B100 biodiesel standard (EN 14214), which also limits the amount of FAMEs with four or more double bonds to 1 wt%, while the ASTM D6751-02 contains no such restrictions [19]. Therefore, polyunsaturated fatty acid content of the biomass, as well as the weighted degree of unsaturation developed by Ramos et al [14], and the predictive fuel stability calculated from only two FAME contents, linoleate (C18:2) and linolenate (C18:3) [20] can serve as indirect estimates of biodiesel oxidative stability. Taken the above into consideration, we applied a higher weighting to PUFA content compared to other FAME-derived biodiesel properties in principal component analyses and additionally calculated the predictive oxidative stability as per [20] to evaluate the suitability of the microalgal FAME profiles.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, polyunsaturated fatty acid content of the biomass, as well as the weighted degree of unsaturation developed by Ramos et al [14], and the predictive fuel stability calculated from only two FAME contents, linoleate (C18:2) and linolenate (C18:3) [20] can serve as indirect estimates of biodiesel oxidative stability. Taken the above into consideration, we applied a higher weighting to PUFA content compared to other FAME-derived biodiesel properties in principal component analyses and additionally calculated the predictive oxidative stability as per [20] to evaluate the suitability of the microalgal FAME profiles. Where possible, biodiesel quality parameters that are not obtainable from FAME profiles have been sourced from available data for algae methyl esters from the literature and will be discussed in comparison to other feedstock for biodiesel as appropriate.…”

Section: Introductionmentioning

confidence: 99%

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Microalgal Species Selection for Biodiesel Production Based on Fuel Properties Derived from Fatty Acid Profiles

et al. 2013

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Physical and chemical properties of biodiesel are influenced by structural features of the fatty acids, such as chain length, degree of unsaturation and branching of the carbon chain. This study investigated if microalgal fatty acid profiles are suitable for biodiesel characterization and species selection through Preference Ranking Organisation Method for Enrichment Evaluation (PROMETHEE) and Graphical Analysis for Interactive Assistance (GAIA) analysis. Fatty acid methyl ester (FAME) profiles were used to calculate the likely key chemical and physical properties of the biodiesel [cetane number (CN), iodine value (IV), cold filter plugging point, density, kinematic viscosity, higher heating value] of nine microalgal species (this study) and twelve species from the literature, selected for their suitability for cultivation in subtropical climates. An equal-parameter weighted (PROMETHEE-GAIA) ranked Nannochloropsis oculata, Extubocellulus sp. and Biddulphia sp. highest; the only species meeting the EN14214 and ASTM D6751-02 biodiesel standards, except for the double bond limit in the EN14214. Chlorella vulgaris OPEN ACCESSEnergies 2013, 6 5677 outranked N. oculata when the twelve microalgae were included. Culture growth phase (stationary) and, to a lesser extent, nutrient provision affected CN and IV values of N. oculata due to lower eicosapentaenoic acid (EPA) contents. Application of a polyunsaturated fatty acid (PUFA) weighting to saturation led to a lower ranking of species exceeding the double bond EN14214 thresholds. In summary, CN, IV, C18:3 and double bond limits were the strongest drivers in equal biodiesel parameter-weighted PROMETHEE analysis.

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“…Predictive oxidative stability was calculated, where possible, based on C18:2 and C18:3 content as suggested by [20], following Equation (11) …”

Section: Calculation Of Fuel Properties From Fatty Acid Profilesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microalgal Species Selection for Biodiesel Production Based on Fuel Properties Derived from Fatty Acid Profiles

et al. 2013

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“…In addition, the fatty acids from R. sphaeroides have special features in that they are mainly composed of unsaturated fatty acids whereas saturated forms are dominant in other microorganisms including microalgae, cyanobacteria, and Escherichia-coli stability, but poor fuel properties at low temperatures, which is a disadvantage in winter operation (Park et al, 2008). Also, unsaturated fatty acids are the raw materials for dietary supplements such as omega-3, omega-6, and omega-7 fatty acids.…”

Section: Fatty Acids Profile and The Performance Comparisonmentioning

confidence: 99%

Continuous cultivation of photosynthetic bacteria for fatty acids production

Kim¹,

Lee²,

Hwang³

et al. 2013

Bioresource Technology

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In the present work, we introduced a novel approach for microbial fatty acids (FA) production. Photosynthetic bacteria, Rhodobacter sphaeroides KD131, were cultivated in a 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 sphaeroides was around 35% of dry cell weight, mainly composed of vaccenic acid (C18:1, omega-7).

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“…Biodiesel has become very crucial owing to higher demand on existing petroleum reserves and lower hazardous emissions as compared to petroleum diesel-fuelled engines [4]. Biodiesel prepared from low-cost non-edible oils, restaurant waste and animal fats can provide substitute fuel that is technically and environmentally acceptable and economically competitive [5].…”

Section: Introductionmentioning

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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Blending effects of biodiesels on oxidation stability and low temperature flow properties

Cited by 307 publications

References 17 publications

Microalgal Species Selection for Biodiesel Production Based on Fuel Properties Derived from Fatty Acid Profiles

Microalgal Species Selection for Biodiesel Production Based on Fuel Properties Derived from Fatty Acid Profiles

Continuous cultivation of photosynthetic bacteria for fatty acids production

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

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