6 – Fuel Properties

Publisher Summary This chapter focuses on fuel properties of biodiesel. Generally, Cetane Number (CN) is a dimensionless descriptor of the ignition quality of a Diesel Fuel (DF). As such, it is a prime indicator of DF quality. In addition to CN, gross Heat of Combustion (HG) is a property proving the suitability of using fatty compounds as DF. The cetane scale clarifies why triacylglycerols as found in vegetable oils, animal fats, and derivatives, thereof, are suitable as alternative DF. The chapter presents that the performance of biodiesel during cold weather may restrict its commercial viability during cold weather in moderate climates. It examines the effects of cold temperatures on biodiesel in neat form (B100) and in blends with diesel fuel made from petroleum middle distillates (petrodiesel), discusses fuel properties for assessing performance of diesel fuels as well as effects of blending with biodiesel, reviews effects of cold temperatures during storage on fuel quality and performance, summarizes approaches based on available technology for improving the performance of biodiesel, and examines promising research and development efforts to enhance the cold flow properties to improve the performance of biodiesel. The chapter discusses viscosity and oxidative stability of biodiesel, explains two issues: (i) lubricity of neat biodiesel as well as its components and how this plays a role for petrodiesel fuels and (ii) the interaction of biodiesel with lubricants in the crankcase of a diesel engine. It further presents a summary of the University of Idaho research related to biodegradability, Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), and toxicity of biodiesel.

[1]  B. Moser,et al.  πSynthesis and evaluation of a series of α-hydroxy ethers derived from isopropyl oleate , 2006 .

[2]  J. V. Gerpen,et al.  The production of fatty acid isopropyl esters and their use as a diesel engine fuel , 2005 .

[3]  Gerhard Knothe,et al.  “Designer” Biodiesel: Optimizing Fatty Ester Composition to Improve Fuel Properties† , 2008 .

[4]  M. César-Oliveira,et al.  Polymethacrylates: Pour point depressants in diesel oil , 2007 .

[5]  Bolun Yang,et al.  Predicting the viscosity of biodiesel fuels based on the mixture topological index method , 2007 .

[6]  M. O. Bagby,et al.  Correlation of heats of combustion with empirical formulas for fatty alcohols , 1989 .

[7]  D. Swern.  Urea and Thiourea Complexes in Separating Organic Compounds , 1955 .

[8]  Ján Cvengroš,et al.  Study of FAME Stability , 2008 .

[9]  R. A. Korus,et al.  Fumigation with propane and transesterification effects on injector coking with vegetable oil fuels. , 1987 .

[11]  K. Watts,et al.  The viscosities of three biodiesel fuels at temperatures up to 300 °C , 2006 .

[12]  W. E. Klopfenstein.  Effect of molecular weights of fatty acid esters on cetane numbers as diesel fuels , 1985 .

[13]  Nicos Ladommatos,et al.  The effect of fuel cetane improver on diesel pollutant emissions , 1996 .

[14]  Florence Lacoste,et al.  The prediction of biodiesel storage stability. Proposal for a quick test , 2004 .

[15]  E. Lois,et al.  Effects of fatty acid derivatives on the ignition quality and cold flow of diesel fuel , 1995 .

[16]  R. Dunn.  Oxidative Stability of Biodiesel by Dynamic Mode Pressurized-Differential Scanning Calorimetry (P-DSC) , 2006 .

[17]  Tong Wang,et al.  Melting Points and Viscosities of Fatty Acid Esters that are Potential Targets for Engineered Oilseed , 2008 .

[18]  H. Wichmann,et al.  Feasibility Study on Membrane‐Aided Cleanup and Fractionation of Fatty Acid Esters Produced from Waste Fats , 2008 .

[19]  M. O. Bagby,et al.  Predicting cetane numbers of n-alcohols and methyl esters from their physical properties , 1990 .

[20]  Evripidis Lois,et al.  HFRR lubricity response of an additized aviation kerosene for use in CI engines , 2002 .

[21]  J. H. Van Gerpen,et al.  INVESTIGATION OF BIODIESEL THERMAL STABILITY UNDER SIMULATED IN-USE CONDITIONS , 1999 .

[22]  M. P. Dorado,et al.  EXHAUST EMISSIONS FROM A DIESEL ENGINE FUELED WITH TRANSESTERIFIED WASTE OLIVE OIL , 2003 .

[23]  D. Swern,et al.  Application of urea complexes in the purification of fatty acids, esters, and alcohols. II. Oleic acid and methyl oleate from olive oil , 1952 .

[24]  J. Toro‐Vázquez,et al.  Crystallization kinetics of palm stearin in blends with sesame seed oil , 2000 .

[25]  T. Foglia,et al.  Fuel properties and nitrogen oxide emission levels of biodiesel produced from animal fats , 2005 .

[26]  Robert O. Dunn,et al.  Low-temperature properties of alkyl esters of tallow and grease , 1997 .

[27]  N. Ramli,et al.  Strategies for decreasing the pour point and cloud point of palm oil products , 2005 .

[28]  Dimitrios M. Korres,et al.  Study of using JP-8 aviation fuel and biodiesel in CI engines , 2003 .

[29]  K. Krisnangkura,et al.  An empirical approach in predicting biodiesel viscosity at various temperatures , 2006 .

[30]  Deog-Keun Kim,et al.  Blending effects of biodiesels on oxidation stability and low temperature flow properties. , 2008, Bioresource technology.

[31]  Fernando Neto da Silva,et al.  Technical feasibility assessment of oleic sunflower methyl ester utilisation in Diesel bus engines. , 2003 .

[32]  J. Durand,et al.  Modification of Wax Crystallization in Petroleum Products , 1991 .

[33]  M. Sharma,et al.  Jatropha-Palm biodiesel blends: An optimum mix for Asia , 2007 .

[34]  Brajendra Kumar Sharma,et al.  Diesters from Oleic Acid: Synthesis, Low Temperature Properties, and Oxidation Stability , 2007 .

[35]  Salmiah Ahmad,et al.  Palm oil and palm kernel oil as raw materials for basic oleochemicals and biodiesel , 2007 .

[36]  A. Dalai,et al.  Preparation and characterization of bio-diesels from various bio-oils. , 2001, Bioresource technology.

[37]  G. Knothe.  Analysis of oxidized biodiesel by 1H‐NMR and effect of contact area with air , 2006 .

[38]  R. Dunn.  Effects of minor constituents on cold flow properties and performance of biodiesel , 2009 .

[39]  P. Claudy,et al.  Diesel fuels: determination of onset crystallization temperature, pour point and filter plugging point by differential scanning calorimetry. Correlation with standard test methods , 1986 .

[40]  R. Dunn.  Thermal analysis of alternative diesel fuels from vegetable oils , 1999 .

[41]  L. Clements,et al.  Viscosities of vegetable oils and fatty acids , 1992 .

[42]  Robert O. Dunn,et al.  Improving the low-temperature properties of alternative diesel fuels: Vegetable oil-derived methyl esters , 1996 .

[43]  Lawrence A. Johnson,et al.  Use of branched-chain esters to reduce the crystallization temperature of biodiesel , 1995 .

[44]  R. Farag.  Poly(Cinnamoyloxy Ethyl Methacrylate-Co-Octadecyl Acrylate) as Flow Improver for Egyptian Waxy Crude Oils , 2008 .

[45]  J. Leahy,et al.  Winterisation of waste cooking oil methyl ester to improve cold temperature fuel properties , 2002 .

[46]  S. Westbrook,et al.  Storage Stability of Biodiesel and Biodiesel Blends , 2010 .

[47]  G. Knothe,et al.  LUBRICITY OF COMPONENTS OF BIODIESEL AND PETRODIESEL. THE ORIGIN OF BIODIESEL LUBRICITY , 2005 .

[48]  R. Dunn.  ANALYSIS OF OXIDATIVE STABILITY OF METHYL SOYATE BYPRESSURIZED-DIFFERENTIAL SCANNING CALORIMETRY , 2000 .

[49]  D. L. Reece,et al.  Long-range on-road test with twenty-percent rapeseed biodiesel. , 1999 .

[50]  G Antolín,et al.  Optimisation of biodiesel production by sunflower oil transesterification. , 2002, Bioresource technology.

[51]  Y. Ali,et al.  Crystallization characteristics of methyl tallowate and its blends with ethanol and diesel fuel , 1996 .

[52]  Rushang M. Joshi,et al.  FLOW PROPERTIES OF BIODIESEL FUEL BLENDS AT LOW TEMPERATURES , 2007 .

[53]  E. Lois,et al.  An investigation of using biodiesel/marine diesel blends on the performance of a stationary diesel engine , 2003 .

[54]  M. Pegg,et al.  Predicting the viscosity of biodiesel fuels from their fatty acid ester composition , 1999 .

[55]  J. W. Mullin,et al.  Crystallization of n-dotriacontane from hydrocarbon solution with polymeric additives , 1990 .

[56]  P. Claudy,et al.  Antagonism between cloud point and cold filter plugging point depressants in a diesel fuel , 1995 .

[57]  F. Lacoste,et al.  Quantification of free and esterified steryl glucosides in vegetable oils and biodiesel , 2009 .

[58]  P. Michalski,et al.  Production of FAME from acid oil, a by-product of vegetable oil refining , 2003 .

[59]  G. I. Brown,et al.  Evolution of diesel fuel cold flow ― the next frontier , 1989 .

[60]  Carlo Giavarini,et al.  Transesterification processes for vegetable oils: A simple control method of methyl ester content , 1995 .

[61]  G. Mushrush,et al.  Lubricity-enhancing properties of soy oil when used as a blending stock for middle distillate fuels , 2002 .

[62]  B. Moser,et al.  Preparation and evaluation of a series of α‐hydroxy ethers from 9,10‐epoxystearates , 2007 .

[63]  A. Hansen,et al.  Temperature-dependent kinematic viscosity of selected biodiesel fuels and blends with diesel fuel , 2005 .

[64]  C. W. Bonhorst,et al.  Physical characterization of a) a series of ethyl esters and b) a series of ethanoate esters , 1955 .

[65]  N. C. Mathur,et al.  Lubrication performance of model organic compounds in high oleic sunflower oil , 1999 .

[66]  K. Mitchell.  The Lubricity of Winter Diesel Fuels , 1995 .

[67]  Paolo Bondioli,et al.  Nature of some insoluble materials recovered from biodiesel samples. , 2009 .

[68]  L. Ramos,et al.  Ethanolysis of Refined Soybean Oil Assisted by Sodium and Potassium Hydroxides , 2007 .

[69]  R. O. Feuge,et al.  Surface and interfacial tensions, viscosities, and other physical properties of some n-aliphatic acids and their methyl and ethyl esters , 1952 .

[70]  S. Kerschbaum,et al.  Winterization of biodiesel by micro process engineering , 2008 .

[71]  Czeslaw Kajdas,et al.  Boundary lubrication of low‐sulphur diesel fuel in the presence of fatty acids , 2001 .

[72]  J. C. Wang,et al.  The Lubricity Requirement of Low Sulfur Diesel Fuels , 1994 .

[73]  M. Graboski,et al.  Impact of biodiesel source material and chemical structure on emissions of criteria pollutants from a heavy-duty engine. , 2001, Environmental science & technology.

[74]  C. J. A. Roelands,et al.  Physical properties of fatty acid methyl esters. VI. Viscosity , 1966 .

[75]  Mustafa Ertunc Tat,et al.  The kinematic viscosity of biodiesel and its blends with diesel fuel , 1999 .

[76]  G. Suppes,et al.  Cold Flow and Ignition Properties of Fischer-Tropsch Fuels , 2000 .

[77]  G. Stachowiak,et al.  Boundary Lubrication Performance of Free Fatty Acids in Sunflower Oil , 2004 .

[78]  J. Encinar,et al.  Biodiesel from Used Frying Oil. Variables Affecting the Yields and Characteristics of the Biodiesel , 2005 .

[79]  L. G. Schumacher,et al.  Engine Oil Analysis of Biodiesel-Fueled Engines , 2005 .

[80]  R. Verhé,et al.  Identification and Occurrence of Steryl Glucosides in Palm and Soy Biodiesel , 2008 .

[81]  D. Leung,et al.  Degradation of biodiesel under different storage conditions. , 2006, Bioresource technology.

[82]  A. Zanier.  Application of Modulated Temperature DSC to Distillate Fuels and Lubricating Greases , 1998 .

[83]  D. Swern,et al.  Application of urea complexes in the purification of fatty acids, esters, and alcohols. I. Oleic acid from inedible animal fats , 1952 .

[84]  M. Haas.  Improving the economics of biodiesel production through the use of low value lipids as feedstocks: vegetable oil soapstock , 2005 .

[85]  R. Dunn.  Crystallization Behavior of Fatty Acid Methyl Esters , 2008 .

[86]  A. J. Meirelles,et al.  Viscosities of fatty acids, triglycerides, and their binary mixtures , 1997 .

[87]  Robert O. Dunn,et al.  Antioxidants for improving storage stability of biodiesel , 2008 .

[88]  Martin Mittelbach,et al.  Long storage stability of biodiesel made from rapeseed and used frying oil , 2001 .

[89]  Paolo Bondioli,et al.  BIODIESEL STABILITY UNDER COMMERCIAL STORAGE CONDITIONS OVER ONE YEAR , 2003 .

[90]  Paolo Bondioli,et al.  Evaluation of biodiesel storage stability using reference methods , 2002 .

[91]  P. Hertz,et al.  The Rocle Test for Diesel and Bio-Diesel Fuel Lubricity , 1997 .

[92]  M. Mittelbach,et al.  Influence of diesel particulate filter additives on biodiesel quality , 2005 .

[93]  R. F. Tucker,et al.  The Lubricity of Deeply Hydrogenated Diesel Fuels - The Swedish Experience , 1994 .

[94]  L. G. Schumacher,et al.  Impact of cold flow improvers on soybean biodiesel blend , 2004 .

[95]  Kiyotaka Sato,et al.  Crystallization behavior of neat biodiesel and biodiesel treated with ozonized vegetable oil , 2005 .

[96]  M. Nikanjam,et al.  Diesel fuel lubricity additive study , 1994 .

[97]  U. Rashid,et al.  Production of biodiesel through optimized alkaline-catalyzed transesterification of rapeseed oil , 2008 .

[98]  J. C. Thompson,et al.  The effect of biodiesel feedstock on regulated emissions in chassis dynamometer tests of a pickup truck. , 1999 .

[99]  D. Reece,et al.  BIODEGRADABILITY OF BIODIESEL IN THE AQUATIC ENVIRONMENT , 1998 .

[100]  L. Johnson,et al.  Reducing the crystallization temperature of biodiesel by winterizing methyl soyate , 1996 .

[101]  M. Haas,et al.  The Identification and Quantification of Steryl Glucosides in Precipitates from Commercial Biodiesel , 2008 .

[102]  J. H. Van Gerpen,et al.  ACCELERATED OXIDATION PROCESSES IN BIODIESEL , 1999 .

[103]  Luiz Pereira Ramos,et al.  The influence of BHA, BHT and TBHQ on the oxidation stability of soybean oil ethyl esters (biodiesel) , 2007 .

[104]  Robert O. Dunn,et al.  Low-temperature properties of triglyceride-based diesel fuels: Transesterified methyl esters and petroleum middle distillate/ester blends , 1995 .

[105]  Dimitrios M. Korres,et al.  Aviation fuel JP-5 and biodiesel on a diesel engine , 2008 .

[106]  Richard W. Hartel,et al.  Phase behavior of model lipid systems: Solubility of high-melting fats in low-melting fats , 2006 .

[107]  Mustafa Ertunc Tat,et al.  Exhaust Emissions from an Engine Fueled with Biodiesel from High-Oleic Soybeans , 2007 .

[108]  Martin Mittelbach,et al.  The impact of antioxidants on biodiesel oxidation stability , 2004 .

[109]  E. Lois,et al.  The tribological behavior of alkyl ethers and alcohols in low sulfur automotive diesel , 2002 .

[110]  Gerhard Knothe,et al.  Kinematic viscosity of biodiesel components (fatty acid alkyl esters) and related compounds at low temperatures , 2007 .

[111]  M. Nikanjam,et al.  Lubricity of Low Sulfur Diesel Fuels , 1993 .

[112]  I. M. El-Gamal,et al.  Nitrogen-based copolymers as wax dispersants for paraffinic gas oils , 1998 .

[113]  M. Vangsness,et al.  Studies of Urea Treatment on the Low-Temperature Properties of Jet Fuel , 2002 .

[114]  M. Bagby,et al.  Synthesis and characterization of some long-chain diesters with branched or bulky moieties , 2000 .

[115]  Haiying Tang,et al.  Formation of Insolubles in Palm Oil-, Yellow Grease-, and Soybean Oil-Based Biodiesel Blends After Cold Soaking at 4 °C , 2008 .

[116]  T. Miyazawa,et al.  Separation and determination of glycolipids from edible plant sources by high-performance liquid chromatography and evaporative light-scattering detection , 1999, Lipids.

[117]  F. Fernández‐Martín,et al.  Viscosity of multicomponent systems of normal fatty acids: Principle of congruence , 1976, Journal of the American Oil Chemists' Society.

[118]  Robert J. Angelici,et al.  Partial separation of polyunsaturated fatty acid esters from FAMEs mixtures by adsorption on silver nitrate-impregnated silica gel , 2006 .

[119]  Ali O. Al-Shyoukh,et al.  Experimental evaluation of the transesterification of waste palm oil into biodiesel. , 2002, Bioresource technology.

[120]  E. Lois,et al.  Impact of oxygen and nitrogen compounds on the lubrication properties of low sulfur diesel fuels , 2004 .

[121]  Dimitrios Karonis,et al.  A PRELIMINARY EVALUATION OF ESTERS OF MONOCARBOXYLIC FATTY ACID ON THE LUBRICATION PROPERTIES OF DIESEL FUEL , 2001 .

[122]  D. Swern,et al.  Application of urea complexes in the purification of fatty acids, esters, and alcohols. III. Concentrates of natural linoleic and linolenic acids , 1953 .

[123]  R. P. Reddy,et al.  Evaluation of Methyl Esters of Mahua Oil (Madhuca Indica) as Diesel Fuel , 2008 .

[124]  T. Isbell,et al.  Evaluation of Castor and Lesquerella Oil Derivatives as Additives in Biodiesel and Ultralow Sulfur Diesel Fuels , 2008 .

[125]  Choo Yuen May,et al.  The effect of natural and synthetic antioxidants on the oxidative stability of palm diesel , 2006 .

[126]  Samia Ashraf,et al.  Production of sunflower oil methyl esters by optimized alkali-catalyzed methanolysis. , 2008 .

[127]  H. A. Aksoy,et al.  Performance and emission characteristics of a diesel engine operating on safflower seed oil methyl ester , 1994 .

[128]  Farooq Anwar,et al.  Moringa oleifera oil: a possible source of biodiesel. , 2008, Bioresource technology.

[129]  Paolo Bondioli,et al.  Identification and quantification of steryl glucosides in biodiesel , 2008 .

[130]  Daniel P. Geller,et al.  Effects of specific fatty acid methyl esters on diesel fuel lubricity , 2004 .

[131]  Evripidis Lois,et al.  Lubrication Properties of Low-Sulfur Diesel Fuels in the Presence of Specific Types of Fatty Acid Derivatives , 2001 .

[132]  M. O. Bagby,et al.  Heats of combustion of fatty esters and triglycerides , 1989 .

[133]  P. Bechtel,et al.  BIODIESEL FROM WASTE SALMON OIL , 2008 .

[134]  J. Agudelo,et al.  Basic properties of palm oil biodiesel–diesel blends , 2008 .

[135]  Zuriati Zakaria,et al.  The effect of polymers and surfactants on the pour point of palm oil methyl esters , 2007 .

[136]  S. Roos,et al.  Wear and Electrical Resistance on Diesel Lubricated Surfaces Undergoing Reciprocating Sliding , 2004 .

[137]  E. Frame,et al.  Screening vegetable oil alcohol esters as fuel lubricity enhancers , 2001 .

[138]  Martin Mittelbach,et al.  The influence of antioxidants on the oxidation stability of biodiesel , 2003 .

[139]  M. R. Islam,et al.  Waste Cooking Oil as an Alternate Feedstock for Biodiesel Production , 2008 .

[140]  Avinash Kumar Agarwal,et al.  Wear assessment in a biodiesel fueled compression ignition engine , 2003 .

[141]  A. Motori,et al.  Supercritical carbon dioxide fractionation of fish oil fatty acid ethyl esters , 2007 .

[142]  G. Knothe,et al.  A Comprehensive Evaluation of the Melting Points of Fatty Acids and Esters Determined by Differential Scanning Calorimetry , 2009 .

[143]  D. L. Reece,et al.  TWO-YEAR STORAGE STUDY WITH METHYL AND ETHYL ESTERS OF RAPESEED , 1998 .

[144]  D. Kolb,et al.  Applications of low temperature crystallization in the separation of the fatty acids and their compounds , 1955 .

[145]  E.-L. Heino,et al.  Determination of cloud point for petroleum middle distillates by differential scanning calorimetry , 1987 .

[146]  Robert O. Dunn,et al.  Effect of Temperature on the Oil Stability Index (OSI) of Biodiesel , 2008 .

[147]  J. A. Kinast,et al.  Production of Biodiesels from Multiple Feedstocks and Properties of Biodiesels and Biodiesel/Diesel Blends: Final Report; Report 1 in a Series of 6 , 2003 .

[148]  D. Kern,et al.  Heat Transfer Characteristics of Fatty Acids , 1949 .

[149]  W. Neff,et al.  Effect of oleic and linoleic acids on the production of deep-fried odor in heated triolein and trilinolein. , 2001, Journal of agricultural and food chemistry.

[150]  T. Isbell,et al.  Synthesis and physical properties of estolides from lesquerella and castor fatty acid esters , 2006 .

[151]  Evripidis Lois,et al.  Impact of Using Biodiesels of Different Origin and Additives on the Performance of a Stationary Diesel Engine , 2000 .

[152]  Andrew C. Matheaus,et al.  Physical properties of oleochemical carbonates , 2005 .

[153]  A. Dalai,et al.  Synthesis and characterization of vegetable oil derived esters: evaluation for their diesel additive properties. , 2004, Bioresource technology.

[154]  R. Dunn.  Cold-Flow Properties of Soybean Oil Fatty Acid Monoalkyl Ester Admixtures† , 2009 .

[155]  Ralph E.H. Sims.  Tallow Esters as an Alternative Diesel Fuel , 1985 .

[156]  Robert O. Dunn,et al.  Effect of antioxidants on the oxidative stability of methyl soyate (biodiesel) , 2005 .

[157]  F. Karaosmanôglu,et al.  Optimization of Base-Catalyzed Transesterification Reaction of Used Cooking Oil , 2004 .

[158]  C. W. Bonhorst,et al.  Esters of Naturally Occurring Fatty Acids - Physical Properties of Methyl, Propyl, and Isopropyl Esters of C6 to C18 Saturated Fatty Acids , 1948 .

[159]  Roland Meyer-Pittroff,et al.  The effect of fatty acid composition on biodiesel oxidative stability , 2004 .

[160]  Ronald A. Holser,et al.  Transesterified milkweed (Asclepias) seed oil as a biodiesel fuel , 2006 .

[161]  B. Pouligny,et al.  How does a cloud point diesel fuel additive work , 1992 .

[162]  H. Schlenk.  Urea inclusion compounds of fatty acids , 1954 .

[163]  Soh Kheang Loh,et al.  Oxidative stability and storage behavior of fatty acid methyl esters derived from used palm oil , 2006 .

[164]  R. Holman,et al.  Highly unsaturated fatty acids. II. Fractionation by urea inclusion compounds , 1954 .

[165]  Bryan R. Moser,et al.  Influence of Blending Canola, Palm, Soybean, and Sunflower Oil Methyl Esters on Fuel Properties of Biodiesel , 2008 .

[166]  S. S. Lestz,et al.  Comparison of Diesel Engine Performance and Emissions from Neat and Transesterified Vegetable Oils , 1984 .

[167]  Florence Lacoste,et al.  Quality parameters evolution during biodiesel oxidation using Rancimat test , 2003 .

[168]  Lilian L. N. Guarieiro,et al.  The Role of Additives for Diesel and Diesel Blended (Ethanol or Biodiesel) Fuels: A Review , 2007 .

[169]  V. Stout,et al.  Fractionation of menhaden oil ethyl esters using supercritical fluid CO2 , 1988 .

[170]  X. Miao,et al.  Biodiesel production from heterotrophic microalgal oil. , 2006, Bioresource technology.

[171]  A. Schwab,et al.  Preparation and properties of diesel fuels from vegetable oils , 1987 .

[172]  Shiro Saka,et al.  Thermodynamic study on cloud point of biodiesel with its fatty acid composition , 2006 .

[173]  Andrew C. Matheaus,et al.  Cetane numbers of branched and straight-chain fatty esters determined in an ignition quality tester , 2003 .

[174]  Hugh Spikes,et al.  The lubricity of diesel fuels , 1986 .

[175]  R. Dunn.  Oxidative stability of soybean oil fatty acid methyl esters by oil stability index (OSI) , 2005 .

[176]  S. Kerschbaum,et al.  Measurement of the temperature dependent viscosity of biodiesel fuels , 2004 .

[177]  A. Kondo,et al.  Biodiesel fuel production by transesterification of oils. , 2001, Journal of bioscience and bioengineering.

[178]  W. N. Sumerwell,et al.  The fractionation of marine-oil fatty acids with urea , 1955 .

[179]  R. Nascimento,et al.  Correlating chemical structure and physical properties of vegetable oil esters , 2006 .

[180]  E. Lucas,et al.  Influence of ethylene‐co‐vinyl acetate copolymers on the flow properties of wax synthetic systems , 2002 .

[181]  Robert L. McCormick,et al.  Several factors affecting the stability of biodiesel in standard accelerated tests , 2007 .

[182]  B. Moser,et al.  Branched chain derivatives of alkyl oleates: Tribological, rheological, oxidation, and low temperature properties , 2008 .

[183]  Roberta Ceriani,et al.  Group Contribution Model for Predicting Viscosity of Fatty Compounds , 2007 .

[184]  J. V. Gerpen,et al.  The influence of trace components on the melting point of methyl soyate , 1998 .

[185]  J. Manson,et al.  Types of Dietary Fat and Risk of Coronary Heart Disease: A Critical Review , 2001, Journal of the American College of Nutrition.

[186]  G. Knothe,et al.  Kinematic viscosity of biodiesel fuel components and related compounds. Influence of compound structure and comparison to petrodiesel fuel components , 2005 .

[187]  D. Geller,et al.  Influence of fatty acid methyl esters from hydroxylated vegetable oils on diesel fuel lubricity. , 2005, Bioresource technology.

[188]  Haiying Tang,et al.  Fuel properties and precipitate formation at low temperature in soy-, cottonseed-, and poultry fat-based biodiesel blends , 2008 .

[189]  Gerhard Knothe,et al.  Dependence of oil stability index of fatty compounds on their structure and concentration and presence of metals , 2003 .

[190]  Kenton R Kaufman,et al.  Sunflower methyl esters for direct injected diesel engines. , 1984 .

[191]  D. S. Shrestha,et al.  Cold flow properties of biodiesel and effect of commercial additives , 2005 .

[192]  H. Newey,et al.  Drying Oils and Resins. Segregation of Fatty Acids and their Derivatives by Extractive Crystallization with Urea. , 1950 .

[193]  Robert O. Dunn,et al.  Effect of oxidation under accelerated conditions on fuel properties of methyl soyate (biodiesel) , 2002 .

[194]  William B. Nilsson,et al.  Supercritical fluid fractionation of fish oil esters using incremental pressure programming and a temperature gradient , 1989 .

[195]  Baltazar D. Aguda,et al.  How do diesel-fuel ignition improvers work? , 1993 .

[196]  W. Greyt,et al.  Palm oil fractionation , 2007 .

[197]  Gerhard Knothe,et al.  Structure indices in FA chemistry. How relevant is the iodine value? , 2002 .

[198]  K. J. Harrington,et al.  Chemical and physical properties of vegetable oil esters and their effect on diesel fuel performance , 1986 .

[199]  V. Makarevičienė,et al.  Cold flow properties of fuel mixtures containing biodiesel derived from animal fatty waste , 2006 .

[200]  W. H. V. D. Walt,et al.  Stability studies on methyl and ethyl fatty acid esters of sunflowerseed oil , 1985 .

[201]  B. Moser,et al.  Biodiesel from canola oil using a 1 : 1 molar mixture of methanol and ethanol* , 2009 .

[202]  J. Polavka,et al.  Oxidation stability of methyl esters studied by differential thermal analysis and rancimat , 2005 .

[203]  Prommes Kwanchareon,et al.  Solubility of a diesel-biodiesel-ethanol blend, its fuel properties, and its emission characteristics from diesel engine , 2007 .

[204]  M. G. Kulkarni,et al.  PRODUCTION OF BIODIESEL FROM WASTE FRYER GREASE USING MIXED METHANOL/ETHANOL SYSTEM , 2007 .

[205]  Nestor U. Soriano,et al.  Ozonized vegetable oil as pour point depressant for neat biodiesel , 2006 .

[206]  A. Dalai,et al.  Preparation and evaluation of vegetable oil derived biodiesel esters as lubricity additives , 2001 .

[207]  Gerhard Knothe,et al.  Cuphea Oil as Source of Biodiesel with Improved Fuel Properties Caused by High Content of Methyl Decanoate , 2009 .

[208]  R. Holman,et al.  Separation and Stabilization of Fatty Acids by Urea Complexes1 , 1950 .

[209]  Paolo Bondioli,et al.  Storage stability of biodiesel , 1995 .

[210]  A. Agarwal.  Lubricating Oil Tribology of a Biodiesel-Fuelled Compression Ignition Engine , 2003 .