Effects of blending C3-C4 alcohols on motor gasoline properties and performance of spark ignition engines: A review

Abstract Supplementing petroleum fuels with sustainable and renewable alternatives is a good option for increasing the sustainability of transportation fuels. Alcohols are particularly attractive blendstocks for spark ignition engines, mainly due to their desirable fuel properties including high octane, evaporative cooling, and reduced sooting propensity. Although the use of SI engines is widespread around the world, predominately for light duty vehicles, concerns about CO2 emissions and other sustainability issues necessitate increased engine efficiencies, reduced tailpipe pollutants, and lower lifecycle carbon emissions. The intelligent blending of C2-C4 alcohols into motor gasoline is a viable method for achieving these goals. There are a multitude of ways to produce renewable alcohols such as through fermentation from first-generation feedstocks (sugar and corn) and second-generation feedstocks (lignocellulosic biomass), or by gasification and mixed alcohol fuel synthesis routes from lignocellulosic biomass. Currently ethanol is extensively used in motor gasoline fuels worldwide and although many have proposed the use of C3 and C4 alcohols in motor gasoline as an improvement over ethanol, the higher cost of production and lack of clear definition as to their benefit over ethanol when blended into motor gasoline have led to slow acceptance into the market. In this review, special emphasis is placed on the effects of blending C3 and C4 alcohols into motor gasoline in terms of physicochemical properties, volatility behavior, and engine performance when compared to ethanol blends. Furthermore, the impact of blending C3 and C4 alcohols with gasoline on emission (particulate matter, nitrogen oxides, carbon monoxide, hydrocarbons, and unregulated oxygenates) and combustion (volumetric efficiency, thermal efficiency, fuel consumption, and cold performance) characteristics is discussed. Although there are some disagreements in the literature over the effect of alcohols predominately around the type of SI engine, i.e., port fuel injected versus direct fuel injected and engine operating mode, generally it is stated that alcohols can potentially reduce soot, unburned hydrocarbons and CO emissions while increasing thermal efficiency when proper engine configuration/calibration is used. Finally, research that must be conducted to find the optimum combination of alcohol blends and engine configurations is highlighted and discussed.

[1]  Panagiotis D. Sparis,et al.  Behavior of a Small Four-Stroke Engine Using as Fuel Methanol - Gasoline Mixtures , 2003 .

[2]  T. Bruno,et al.  Composition-explicit distillation curves of diesel fuel with glycol ether and glycol ester oxygenates: fuel analysis metrology to enable decreased particulate emissions. , 2008, Environmental science & technology.

[3]  James C. Liao,et al.  Directed Evolution of Methanococcus jannaschii Citramalate Synthase for Biosynthesis of 1-Propanol and 1-Butanol by Escherichia coli , 2008, Applied and Environmental Microbiology.

[4]  V. Zverlov,et al.  Reconstructing the clostridial n-butanol metabolic pathway in Lactobacillus brevis , 2010, Applied Microbiology and Biotechnology.

[5]  Haji Hassan Masjuki,et al.  Performance and emission analysis of a multi cylinder gasoline engine operating at different alcohol–gasoline blends , 2014 .

[6]  J. Yanowitz,et al.  Impact of higher alcohols blended in gasoline on light-duty vehicle exhaust emissions. , 2013, Environmental science & technology.

[7]  Yakup Sekmen,et al.  The effects of ethanol―unleaded gasoline blends on engine performance and exhaust emissions in a spark-ignition engine , 2009 .

[8]  G. Karavalakis,et al.  Components of Particle Emissions from Light-Duty Spark-Ignition Vehicles with Varying Aromatic Content and Octane Rating in Gasoline. , 2015, Environmental science & technology.

[9]  Lee R. Lynd,et al.  Overview and evaluation of fuel ethanol from cellulosic biomass , 1996 .

[10]  F. N. Alasfour.  NOx EMISSION FROM A SPARK IGNITION ENGINE USING 30% ISO-BUTANOL–GASOLINE BLEND: PART 2—IGNITION TIMING , 1998 .

[11]  L. Moskaleva,et al.  The spin-conserved reaction CH+N2→H+NCN: A major pathway to prompt no studied by quantum/statistical theory calculations and kinetic modeling of rate constant , 2000 .

[12]  Hongming Xu,et al.  Ignition timing sensitivities of oxygenated biofuels compared to gasoline in a direct-injection SI engine , 2012 .

[13]  H. L. Walmsley,et al.  Particulate and Hydrocarbon Emissions from a Spray Guided Direct Injection Spark Ignition Engine with Oxygenate Fuel Blends , 2007 .

[14]  H. Curran,et al.  A comparison of longer alkane and alcohol ignition including new experimental results for n-pentanol and n-hexanol , 2013 .

[15]  R. Stone,et al.  The Influence of Ethanol Blends on Particulate Matter Emissions from Gasoline Direct Injection Engines , 2010 .

[16]  J. C. Liao,et al.  Engineered Synthetic Pathway for Isopropanol Production in Escherichia coli , 2007, Applied and Environmental Microbiology.

[17]  S. M. Sarathy,et al.  An experimental and modeling study of n-octanol combustion , 2015 .

[18]  Michael Frenklach,et al.  Detailed Mechanism and Modeling of Soot Particle Formation , 1994 .

[19]  Y. Dahman,et al.  Enhanced biobutanol production using novel clostridial fusants in simultaneous saccharification and fermentation of green renewable agriculture residues , 2015 .

[20]  Zhijin Zhang,et al.  Combustion and particle number emissions of a direct injection spark ignition engine operating on ethanol/gasoline and n-butanol/gasoline blends with exhaust gas recirculation , 2014 .

[21]  Craig T. Bowman,et al.  Control of combustion-generated nitrogen oxide emissions: Technology driven by regulation , 1992 .

[22]  Zhengqing Chen,et al.  Impact of higher n-butanol addition on combustion and performance of GDI engine in stoichiometric combustion , 2015 .

[23]  Ingemar Denbratt,et al.  In-cylinder soot imaging and emissions of stratified combustion in a spark-ignited spray-guided direct-injection gasoline engine , 2011 .

[24]  Haiqiao Wei,et al.  Knock characteristics of SI engine fueled with n-butanol in combination with different EGR rate , 2017 .

[25]  Can Çinar,et al.  Effect of ethanol-gasoline blends on engine performance and exhaust emissions in different compression ratios , 2006 .

[26]  Y. Hardalupas,et al.  Effects of Fuel Properties Associated with In-Cylinder Behavior on Particulate Number from a Direct Injection Gasoline Engine , 2017 .

[27]  Nitesh Mittal,et al.  Study of performance and emission characteristics of a partially coated LHR SI engine blended with n-butanol and gasoline , 2013 .

[28]  C. Westbrook,et al.  Modeling of Aromatic and Polycyclic Aromatic Hydrocarbon Formation in Premixed Methane and Ethane Flames , 1996 .

[29]  Gino Bella,et al.  Gasoline direct injection spray simulation , 2006 .

[30]  Adrian Irimescu,et al.  Performance and fuel conversion efficiency of a spark ignition engine fueled with iso-butanol , 2012 .

[31]  Timothy S. Ham,et al.  Metabolic engineering of microorganisms for biofuels production: from bugs to synthetic biology to fuels. , 2008, Current opinion in biotechnology.

[32]  Reyes García-Contreras,et al.  Stability, Lubricity, Viscosity, and Cold-Flow Properties of Alcohol−Diesel Blends , 2010 .

[33]  T. Ezeji,et al.  Butanol production from agricultural residues: Impact of degradation products on Clostridium beijerinckii growth and butanol fermentation , 2007, Biotechnology and bioengineering.

[34]  Michael J. Brear,et al.  The octane numbers of ethanol blended with gasoline and its surrogates , 2014 .

[35]  M. A. Wakil,et al.  Tailoring the key fuel properties using different alcohols (C2-C6) and their evaluation in gasoline engine , 2014 .

[36]  J. Yanowitz,et al.  Properties of Oxygenates Found in Upgraded Biomass Pyrolysis Oil as Components of Spark and Compression Ignition Engine Fuels , 2015 .

[37]  P. Izák,et al.  Increased productivity of Clostridium acetobutylicum fermentation of acetone, butanol, and ethanol by pervaporation through supported ionic liquid membrane , 2008, Applied Microbiology and Biotechnology.

[38]  Michael Taylor,et al.  An overview of second generation biofuel technologies. , 2010, Bioresource technology.

[39]  Wayne Moore,et al.  Investigation of Knock Limited Compression Ratio of Ethanol Gasoline Blends , 2010 .

[40]  James E. Anderson,et al.  Particulate matter indices using fuel smoke point for vehicle emissions with gasoline, ethanol blends, and butanol blends , 2016 .

[41]  Bo Zhang,et al.  Effects of hydrogen addition and cylinder cutoff on combustion and emissions performance of a spark , 2010 .

[42]  P. Aleiferis,et al.  An analysis of spray development with iso-octane, n-pentane, gasoline, ethanol and n-butanol from a multi-hole injector under hot fuel conditions , 2013 .

[43]  Bo Zhang,et al.  Combustion analysis and emissions characteristics of a hydrogen-blended methanol engine at various spark timings , 2015 .

[44]  A. Ramesh,et al.  Experimental studies on the effect of injection timing in a SI engine using dual injection of n-butanol and gasoline in the intake port , 2014 .

[45]  Hongming Xu,et al.  Combustion performance of bio-ethanol at various blend ratios in a gasoline direct injection engine , 2011 .

[46]  G. Najafi,et al.  Evaluation on physicochemical properties of iso-butanol additives in ethanol-gasoline blend on performance and emission characteristics of a spark-ignition engine , 2018, Applied Thermal Engineering.

[47]  Mustafa Canakci,et al.  Impact of alcohol–gasoline fuel blends on the performance and combustion characteristics of an SI engine , 2010 .

[48]  Performance and emissions of a DISI engine fueled with gasoline/ethanol and gasoline/C-4 oxygenate blends – Development of a PM index correlation for particulate matter emission assessment , 2019, Fuel.

[49]  Su Han Park,et al.  Atomization and spray characteristics of bioethanol and bioethanol blended gasoline fuel injected through a direct injection gasoline injector , 2009 .

[50]  Qin Zhang,et al.  Ethanol-diesel fuel blends -- a review. , 2005, Bioresource technology.

[51]  Reda M. Bata,et al.  The performance and emission characteristics of C1-C5 alcohol-gasoline blends with matched oxygen content in a single-cylinder spark ignition engine , 1998 .

[52]  Timothy J. Wallington,et al.  Octane Numbers of Ethanol− and Methanol−Gasoline Blends Estimated from Molar Concentrations , 2010 .

[53]  Matsuo Odaka,et al.  Study of the Effect of Boiling Point on Combustion and PM Emissions in a Compression Ignition Engine Using Two-Component n-Paraffin Fuels , 2002 .

[54]  Lennox Siwale,et al.  Performance, combustion and emission characteristics of n-butanol additive in methanol–gasoline blend fired in a naturally-aspirated spark ignition engine , 2014 .

[55]  Wang Jianxin,et al.  Unregulated Emissions and Combustion Characteristics of Low-Content Methanol-Gasoline Blended Fuels , 2010 .

[56]  T. Chan,et al.  Black carbon emissions in gasoline exhaust and a reduction alternative with a gasoline particulate filter. , 2014, Environmental science & technology.

[57]  P. Versailles,et al.  NO formation in rich premixed flames of C1–C4 alkanes and alcohols , 2017 .

[58]  F. Halter,et al.  Evaluation of Butanol–Gasoline Blends in a Port Fuel-injection, Spark-Ignition Engine , 2010 .

[59]  Bo Zhang,et al.  Combustion and emissions characteristics of a spark-ignition engine fueled with hydrogen–methanol blends under lean and various loads conditions , 2014 .

[60]  Thomas Wallner,et al.  Analytical Assessment of C2–C8 Alcohols as Spark-Ignition Engine Fuels , 2013 .

[61]  Majid Ezzati,et al.  Fine-particulate air pollution and life expectancy in the United States. , 2009, The New England journal of medicine.

[62]  A. Elfasakhany.  Experimental study of dual n-butanol and iso-butanol additives on spark-ignition engine performance and emissions , 2016 .

[63]  J. Liao,et al.  Engineering a synthetic pathway in cyanobacteria for isopropanol production directly from carbon dioxide and light. , 2013, Metabolic engineering.

[64]  Keshav S. Varde,et al.  Characterization of Exhaust Emissions in a SI Engine using E85 and Cooled EGR , 2009 .

[65]  A. Ota,et al.  The Effect of Ethanol Fuel on a Spark Ignition Engine , 2006 .

[66]  C. Lee,et al.  Lean Combustion and Emission Characteristics of Bioethanol and Its Blends in a Spark Ignition (SI) Engine , 2011 .

[67]  Luís Carlos M. Sales,et al.  Cold start emissions of an ethanol-fuelled engine with heated intake air and fuel , 2012 .

[68]  M. Çelik,et al.  The use of pure methanol as fuel at high compression ratio in a single cylinder gasoline engine , 2011 .

[69]  C. Nilsson,et al.  The influence of oxygenated fuels on emissions of aldehydes and ketones from a two-stroke spark ignition engine , 2011 .

[70]  G. Langella,et al.  Ethanol in gasoline fuel blends: Effect on fuel consumption and engine out emissions of SI engines in cold operating conditions , 2018 .

[71]  Tsung-Lin Wu,et al.  Engine performance and pollutant emission of an SI engine using ethanol–gasoline blended fuels , 2002 .

[72]  Matthew A. Ratcliff,et al.  Effects of Gasoline Direct Injection Engine Operating Parameters on Particle Number Emissions , 2012 .

[73]  C. McEnally,et al.  Sooting tendencies of oxygenated hydrocarbons in laboratory-scale flames. , 2011, Environmental science & technology.

[74]  Luís Carlos M. Sales,et al.  Cold start characteristics of an ethanol-fuelled engine with heated intake air and fuel , 2012 .

[75]  Matthew J. Brusstar,et al.  High Efficiency and Low Emissions from a Port-Injected Engine with Neat Alcohol Fuels , 2002 .

[76]  Tapaswy Muppaneni,et al.  ASI: Hydrothermal extraction and characterization of bio‐crude oils from wet chlorella sorokiniana and dunaliella tertiolecta , 2013 .

[77]  E. Papoutsakis,et al.  Dynamics of Genomic-Library Enrichment and Identification of Solvent Tolerance Genes for Clostridium acetobutylicum , 2007, Applied and Environmental Microbiology.

[78]  Burak Atakan,et al.  Studies of aromatic hydrocarbon formation mechanisms in flames: Progress towards closing the fuel gap , 2006 .

[79]  Silvana Di Iorio,et al.  Characterization of Ethanol Blends Combustion Processes and Soot Formation in a GDI Optical Engine , 2013 .

[80]  Isaac Schifter,et al.  Combustion and emissions behavior for ethanol–gasoline blends in a single cylinder engine , 2011 .

[81]  F. Battin‐Leclerc.  Detailed chemical kinetic models for the low-temperature combustion of hydrocarbons with application to gasoline and diesel fuel surrogates , 2008 .

[82]  Gina M. Fioroni,et al.  Impact of ethanol blending into gasoline on aromatic compound evaporation and particle emissions from a gasoline direct injection engine , 2019, Applied Energy.

[83]  Yan Ding,et al.  Evaluation on toxic reduction and fuel economy of a gasoline direct injection- (GDI-) powered passenger car fueled with methanol–gasoline blends with various substitution ratios , 2015 .

[84]  S. M. Sarathy,et al.  PAH growth initiated by propargyl addition: mechanism development and computational kinetics. , 2014, The journal of physical chemistry. A.

[85]  Ali Sürmen,et al.  Experimental investigation of the effect of E85 on engine performance and emissions under various ignition timings , 2014 .

[86]  R. Niven.  Ethanol in gasoline: environmental impacts and sustainability review article , 2005 .

[87]  Murray J. Thomson,et al.  A review of the combustion and emissions properties of advanced transportation biofuels and their impact on existing and future engines , 2015 .

[88]  Thomas Wallner,et al.  Effects of Blending Gasoline With Ethanol and Butanol on Engine Efficiency and Emissions Using a Direct-Injection, Spark-Ignition Engine , 2009 .

[89]  Wang Ying,et al.  Effects of Methanol/Gasoline Blends on a Spark Ignition Engine Performance and Emissions , 2008 .

[90]  Mustafa Canakci,et al.  The effect of different alcohol fuels on the performance, emission and combustion characteristics of a gasoline engine , 2014 .

[91]  An Investigation of Potential and Challenges with Higher Ethanol-gasoline Blend on a Single Cylinder Spark Ignition Research Engine , 2009 .

[92]  S. Saravanan,et al.  Use of higher alcohol biofuels in diesel engines: A review , 2016 .

[93]  C. Westbrook,et al.  Biofuels combustion. , 2013, Annual review of physical chemistry.

[94]  Wolfgang Marquardt,et al.  Model-Based Design of Tailor-Made Biofuels , 2016 .

[95]  Stephen E. Stein,et al.  Detailed kinetic modeling of soot formation in shock-tube pyrolysis of acetylene , 1985 .

[96]  M. Frenklach,et al.  Detailed modeling of soot formation in laminar premixed ethylene flames at a pressure of 10 bar , 1995 .

[97]  Anupam Dutta,et al.  Carbon emission and ethanol markets: evidence from Brazil , 2018, Biofuels, Bioproducts and Biorefining.

[98]  A. Irimescu.  Study of cold start air-fuel mixture parameters for spark ignition engines fueled with gasoline-isobutanol blends , 2010 .

[99]  J. Liao,et al.  Metabolic engineering of Escherichia coli for 1-butanol and 1-propanol production via the keto-acid pathways. , 2008, Metabolic engineering.

[100]  Shengming Liao,et al.  Combustion, performance and emissions characteristics of a spark-ignition engine fueled with isopropanol-n-butanol-ethanol and gasoline blends , 2016 .

[101]  D R Woods,et al.  The genetic engineering of microbial solvent production. , 1995, Trends in biotechnology.

[102]  P. Bielaczyc,et al.  A Study of Gasoline-Ethanol Blends Influence on Performance and Exhaust Emissions from a Light-Duty Gasoline Engine , 2012 .

[103]  F. Akamatsu,et al.  Effects of fuel droplet size distribution on soot formation in spray flames formed in a laminar counterflow , 2013 .

[104]  Thomas Wallner,et al.  Combustion Behavior of Gasoline and Gasoline/Ethanol Blends in a Modern Direct-Injection 4-Cylinder Engine , 2008 .

[105]  M. Moo-young,et al.  Biochemical, genetic, and metabolic engineering strategies to enhance coproduction of 1-propanol and ethanol in engineered Escherichia coli , 2014, Applied Microbiology and Biotechnology.

[106]  Hui Zhang,et al.  Experimental investigation on the combustion and particulate matter (PM) emissions from a port-fuel injection (PFI) gasoline engine fueled with methanol–ultralow sulfur gasoline blends , 2015 .

[107]  Jehad A. A. Yamin,et al.  Effect of Methanol Addition on the Performance of Spark Ignition Engines , 2004 .

[108]  H. Böhm,et al.  PAH growth and soot formation in the pyrolysis of acetylene and benzene at high temperatures and pressures: Modeling and experiment , 1998 .

[109]  A. N. Ozsezen,et al.  Performance and combustion characteristics of alcoholgasoline blends at wide-open throttle , 2011 .

[110]  Guohong Tian,et al.  Dual-injection: The flexible, bi-fuel concept for spark-ignition engines fuelled with various gasoline and biofuel blends , 2011 .

[111]  G. Langella,et al.  Effect of ethanol–gasoline blends on CO and HC emissions in last generation SI engines within the cold-start transient: An experimental investigation , 2016 .

[112]  A. Vicet,et al.  Effects of low temperature on the cold start gaseous emissions from light duty vehicles fuelled by ethanol-blended gasoline , 2013 .

[113]  Fangjie Liu,et al.  Formaldehyde and Methanol Emissions from a Methanol/Gasoline-Fueled Spark-Ignition (SI) Engine , 2009 .

[114]  T. Hanai,et al.  Optimization of isopropanol production by engineered cyanobacteria with a synthetic metabolic pathway. , 2015, Journal of bioscience and bioengineering.

[115]  Ole John Nielsen,et al.  Distillation Curves for Alcohol−Gasoline Blends , 2010 .

[116]  F. Akamatsu,et al.  Soot formation, spray characteristics, and structure of jet spray flames under high pressure , 2011 .

[117]  H. Bahl,et al.  Metabolic engineering of Clostridium acetobutylicum: recent advances to improve butanol production. , 2011, Current opinion in biotechnology.

[118]  M. Pospišil,et al.  Volatility and phase stability of petrol blends with ethanol , 2009 .

[119]  Peter Glarborg,et al.  Formation of polycyclic aromatic hydrocarbons and soot in fuel-rich oxidation of methane in a laminar flow reactor , 2004 .

[120]  Thomas G. Leone,et al.  The Effect of Compression Ratio, Fuel Octane Rating, and Ethanol Content on Spark-Ignition Engine Efficiency. , 2015, Environmental science & technology.

[121]  Richard Fiifi Turkson,et al.  Spark Ignition Engine Combustion, Performance and Emission Products from Hydrous Ethanol and Its Blends with Gasoline , 2016 .

[122]  R. Lemaire,et al.  Effect of ethanol addition in gasoline and gasoline–surrogate on soot formation in turbulent spray flames , 2010 .

[123]  Robert Albert Stein,et al.  An Overview of the Effects of Ethanol-Gasoline Blends on SI Engine Performance, Fuel Efficiency, and Emissions , 2013 .

[124]  C. Westbrook,et al.  A comprehensive detailed chemical kinetic reaction mechanism for combustion of n-alkane hydrocarbons from n-octane to n-hexadecane , 2009 .

[125]  J. Yanowitz,et al.  Renewable Oxygenate Blending Effects on Gasoline Properties , 2011 .

[126]  C. Tomas,et al.  Transcriptional Analysis of Butanol Stress and Tolerance in Clostridium acetobutylicum , 2004, Journal of bacteriology.

[127]  Haji Hassan Masjuki,et al.  Effect of ethanol–gasoline blend on NOx emission in SI engine , 2013 .

[128]  Dragos Ciuparu,et al.  Experimental study of fuel decomposition and hydrocarbon growth processes for practical fuel components: heptanes , 2003 .

[129]  M. Wooldridge,et al.  In-Cylinder Particulate Matter and Spray Imaging of Ethanol/Gasoline Blends in a Direct Injection Spark Ignition Engine , 2013 .

[130]  Min Xu,et al.  Flash Boiling: Easy and Better Way to Generate Ideal Sprays than the High Injection Pressure , 2013 .

[131]  Marcos Chaos,et al.  Low and intermediate temperature oxidation of ethanol and ethanol–PRF blends: An experimental and modeling study , 2009 .

[132]  M. Wilkins,et al.  Continuous syngas fermentation for the production of ethanol, n-propanol and n-butanol. , 2014, Bioresource technology.

[133]  Atilla Bilgin,et al.  Effects of Methanol Addition to Gasoline on the Performance and Fuel Cost of a Spark Ignition Engine , 2008 .

[134]  A. Elfasakhany.  Exhaust emissions and performance of ternary iso-butanol–bio-methanol–gasoline and n-butanol–bio-ethanol–gasoline fuel blends in spark-ignition engines: Assessment and comparison , 2018, Energy.

[135]  A. Elfasakhany.  Experimental study on emissions and performance of an internal combustion engine fueled with gasoline and gasoline/n-butanol blends , 2014 .

[136]  M. Pilch,et al.  Use of breakup time data and velocity history data to predict the maximum size of stable fragments for acceleration-induced breakup of a liquid drop , 1987 .

[137]  Chia-Fon Lee,et al.  Development of a simplified bubble growth model for flash boiling sprays in direct injection spark ignition engines , 2005 .

[138]  Chang-Gi Kim,et al.  Performance and exhaust emission characteristics of a spark ignition engine using ethanol and ethanol-reformed gas , 2010 .

[139]  M. Al-Hasan.  Effect of ethanol-unleaded gasoline blends on engine performance and exhaust emission , 2003 .

[140]  Bret C. Windom,et al.  Near-azeotropic volatility behavior of hydrous and anhydrous ethanol gasoline mixtures and impact on droplet evaporation dynamics , 2018, Fuel Processing Technology.

[141]  Ashish S. Lanje,et al.  Performance and Emission Characteristics of SI Engine using LPG-Ethanol Blends: A Review , 2012 .

[142]  Yunshan Ge,et al.  Comparison of PM emissions from a gasoline direct injected (GDI) vehicle and a port fuel injected (PFI) vehicle measured by electrical low pressure impactor (ELPI) with two fuels: Gasoline and M15 methanol gasoline , 2013 .

[143]  Joseph Kazour,et al.  Heated Injectors for Ethanol Cold Starts , 2009 .

[144]  H. Bockhorn,et al.  Kinetic modeling of soot formation with detailed chemistry and physics: laminar premixed flames of C2 hydrocarbons , 2000 .

[145]  Richard R. Steeper,et al.  Piston Wetting in an Optical DISI Engine: Fuel Films, Pool Fires, and Soot Generation , 2001 .

[146]  Mustafa Canakci,et al.  Impact of alcohol-gasoline fuel blends on the exhaust emission of an SI engine , 2013 .

[147]  A. Ganji,et al.  Performance and Exhaust Emissions of a Single-Cylinder Utility Engine Using Ethanol Fuel , 2006 .

[148]  E. Sher,et al.  Flash-boiling atomization , 2008 .

[149]  Y.zh. Bian,et al.  Properties, performance, and emissions of methanol-gasoline blends in a spark ignition engine , 2005 .

[150]  Ke Li,et al.  The challenges and strategies of butanol application in conventional engines: The sensitivity study of ignition and valve timing , 2013 .

[151]  M. A. Ceviz,et al.  Effects of ethanol–unleaded gasoline blends on cyclic variability and emissions in an SI engine , 2005 .

[152]  M. Maricq,et al.  The Impact of Ethanol Fuel Blends on PM Emissions from a Light-Duty GDI Vehicle , 2012 .

[153]  Michael J. Brear,et al.  The Effect of Charge Cooling on the RON of Ethanol/Gasoline Blends , 2013 .

[154]  D. Carder,et al.  Emissions characteristics of higher alcohol/gasoline blends , 2000 .

[155]  Ashraf Elfasakhany,et al.  Investigations on the effects of ethanol–methanol–gasoline blends in a spark-ignition engine: Performance and emissions analysis , 2015 .

[156]  Gerardo Valentino,et al.  In-cylinder spectroscopic measurements of knocking combustion in a SI engine fuelled with butanol–gasoline blend , 2013 .

[157]  Suraj Singh,et al.  Technical feasibility study of butanol–gasoline blends for powering medium-duty transportation spark ignition engine , 2015 .

[158]  Avinash Kumar Agarwal,et al.  Combustion, performance, emissions and particulate characterization of a methanol–gasoline blend (gasohol) fuelled medium duty spark ignition transportation engine , 2014 .

[159]  E. Galloni,et al.  Performance analyses of a spark-ignition engine firing with gasoline–butanol blends at partial load operation , 2016 .

[160]  Rong-Horng Chen,et al.  The influence of air-fuel ratio on engine performance and pollutant emission of an SI engine using ethanol-gasoline-blended fuels , 2004 .

[161]  G. Hong,et al.  Effects of direct injection timing of ethanol fuel on engine knock and lean burn in a port injection gasoline engine , 2014 .

[162]  Bo Zhang,et al.  Enhancing the performance of a spark-ignition methanol engine with hydrogen addition , 2013 .

[163]  G. Dhamodaran,et al.  Performance, emission and combustion characteristics of a branched higher mass, C3 alcohol (isopropanol) blends fuelled medium duty MPFI SI engine , 2017 .

[164]  S. M. Sarathy,et al.  Alcohol combustion chemistry , 2014 .

[165]  J. Griffiths,et al.  SPONTANEOUS IGNITION OF HYDROCARBON AND RELATED FUELS: A FUNDAMENTAL STUDY OF THERMOKINETIC INTERACTIONS , 1985 .

[166]  F. P. Stein,et al.  Water solubilities in blends of gasoline and oxygenates , 1996 .

[167]  A. M. Xavier,et al.  Second Generation Bioethanol Production: On the Use of Pulp and Paper Industry Wastes as Feedstock , 2018, Fermentation.

[168]  Michael Howard Shelby,et al.  Octane Numbers of Ethanol-Gasoline Blends: Measurements and Novel Estimation Method from Molar Composition , 2012 .

[169]  S. Davis,et al.  Determination of and Fuel Structure Effects on Laminar Flame Speeds of C1 to C8 Hydrocarbons , 1998 .

[170]  Andrea Schreiber,et al.  Photocatalytic methanol and methane production using captured CO2 from coal-fired power plants. Part I – a Life Cycle Assessment , 2014 .

[171]  Thomas J. Bruno,et al.  Improvements in the measurement of distillation curves. 3. Application to gasoline and gasoline + methanol mixtures , 2007 .

[172]  John T. Tester,et al.  The Impacts of Mid-level Biofuel Content in Gasoline on SIDI Engine-out and Tailpipe Particulate Matter Emissions , 2010 .

[173]  Ole John Nielsen,et al.  Vapor Pressures of Alcohol−Gasoline Blends , 2010 .

[174]  Jun Li,et al.  Emissions of Formaldehyde and Unburned Methanol from a Spark-Ignition Methanol Engine during Cold Start , 2010 .

[175]  K Varde,et al.  Exhaust emissions and energy release rates from a controlled spark ignition engine using ethanol blends , 2007 .

[176]  Yunshan Ge,et al.  Carbonyl compound emissions from passenger cars fueled with methanol/gasoline blends. , 2010, The Science of the total environment.

[177]  Paul A. Erickson,et al.  Experimental results of hydrogen enrichment of ethanol in an ultra-lean internal combustion engine , 2014 .

[178]  Nasib Qureshi,et al.  Butanol fermentation research: upstream and downstream manipulations. , 2004, Chemical record.

[179]  W. Cheng,et al.  Effects of Ethanol Content on Gasohol PFI Engine Wide-Open-Throttle Operation , 2009 .

[180]  Felix Leach,et al.  The Influence of Fuel Properties on Particulate Number Emissions from a Direct Injection Spark Ignition Engine , 2013 .

[181]  Iason Dimou,et al.  Particulate Matter Emissions from a Direct Injection Spark Ignition Engine under Cold Fast Idle Conditions for Ethanol-Gasoline Blends , 2011 .

[182]  C. Nilsson,et al.  Emissions of aldehydes and ketones from a two-stroke engine using ethanol and ethanol-blended gasoline as fuel. , 2002, Environmental science & technology.

[183]  C. Lee,et al.  Soot Emissions of Various Oxygenated Biofuels in Conventional Diesel Combustion and Low-Temperature Combustion Conditions , 2012 .

[184]  Michael Wensing,et al.  Structure of evaporating single- and multicomponent fuel sprays for 2nd generation gasoline direct injection , 2011 .

[185]  Masoud Aghajani,et al.  Simultaneous biomass production and water desalination concentrate treatment by using microalgae , 2018 .

[186]  S. Turns.  Understanding NOx formation in nonpremixed flames: Experiments and modeling , 1995 .

[187]  L. K. Bowles,et al.  Effects of butanol on Clostridium acetobutylicum , 1985, Applied and environmental microbiology.

[188]  Yajun Yan,et al.  Engineering metabolic systems for production of advanced fuels , 2009, Journal of Industrial Microbiology & Biotechnology.

[189]  C. Law,et al.  Non-premixed ignition, laminar flame propagation, and mechanism reduction of n-butanol, iso-butanol, and methyl butanoate , 2011 .

[190]  Yunshan Ge,et al.  Effects of different mixing ratios on emissions from passenger cars fueled with methanol/gasoline blends. , 2011, Journal of environmental sciences.

[191]  M. Gautam,et al.  Combustion characteristics of higher-alcohol/gasoline blends , 2000 .

[192]  T. Larsson,et al.  Future Fuels for DISI Engines: A Review on Oxygenated, Liquid Biofuels , 2019, SAE Technical Paper Series.

[193]  cool flames , 2020, Catalysis from A to Z.

[194]  Janusz A. Kozinski,et al.  Alcohols as alternative fuels: An overview , 2011 .

[195]  A. Elfasakhany,et al.  Performance and emissions assessment of n-butanol–methanol–gasoline blends as a fuel in spark-ignition engines , 2016 .

[196]  Takayuki Ito,et al.  Extraction of the suppression effects of oxygenated fuels on soot formation using a detailed chemical kinetic model , 2001 .

[197]  H. Roh,et al.  Effect of bioethanol as an alternative fuel on the emissions reduction characteristics and combustion stability in a spark ignition engine , 2009 .

[198]  Cenk Sayin,et al.  The effect of compression ratio on the performance, emissions and combustion of an SI (spark ignition) engine fueled with pure ethanol, methanol and unleaded gasoline , 2014 .

[199]  Jeffrey T Moss,et al.  An experimental and kinetic modeling study of the oxidation of the four isomers of butanol. , 2008, The journal of physical chemistry. A.

[200]  Fernando Lepsch,et al.  Influence of hot fuel injection on air/fuel mixture preparation and effects on Flex Fuel Engines , 2006 .

[201]  P. R. Westmoreland,et al.  Biofuel combustion chemistry: from ethanol to biodiesel. , 2010, Angewandte Chemie.

[202]  Steven S. McConnell,et al.  A Comparison of Ethanol and Butanol as Oxygenates Using a Direct-Injection, Spark-Ignition Engine , 2009 .

[203]  Forecasting ethanol market volatility: new evidence from the corn implied volatility index , 2018, Biofuels, Bioproducts and Biorefining.

[204]  A Kowalewicz,et al.  Methanol as a Fuel for Spark Ignition Engines: A Review and Analysis , 1993 .

[205]  Seong-Young Lee,et al.  REDUCTION OF PAH AND SOOT IN PREMIXED ETHYLENE-AIR FLAMES BY ADDITION OF DIMETHYL ETHER , 2006 .

[206]  P. Wright,et al.  Biodegradation of propanol and isopropanol by a mixed microbial consortium , 2000, Applied Microbiology and Biotechnology.

[207]  Zuo-hua Huang,et al.  Emission characteristics of a spark-ignition engine fuelled with gasoline-n-butanol blends in combination with EGR , 2012 .

[208]  J. Liao,et al.  Driving Forces Enable High-Titer Anaerobic 1-Butanol Synthesis in Escherichia coli , 2011, Applied and Environmental Microbiology.

[209]  Avinash Kumar Agarwal,et al.  Biofuels (alcohols and biodiesel) applications as fuels for internal combustion engines , 2007 .

[210]  Yanning Zheng,et al.  Problems with the microbial production of butanol , 2009, Journal of Industrial Microbiology & Biotechnology.

[211]  D. Kyritsis,et al.  Experimental Investigation of Butanol Isomer Combustion in Spark Ignition Engines , 2012 .

[212]  Aron D. Butler,et al.  Influence of Fuel PM Index and Ethanol Content on Particulate Emissions from Light-Duty Gasoline Vehicles , 2015 .

[213]  John M. E. Storey,et al.  Ethanol Blend Effects On Direct Injection Spark-Ignition Gasoline Vehicle Particulate Matter Emissions , 2010 .

[214]  Fathollah Ommi,et al.  Impact of Methanol–Gasoline Fuel Blends on the Performance and Exhaust Emissions of a SI Engine , 2011 .

[215]  Arnold Weissberger,et al.  Organic solvents;: Physical properties and methods of purification , 1970 .

[216]  Syed Yousufuddin,et al.  Effect of ignition timing and compression ratio on the performance of a hydrogen–ethanol fuelled engine , 2009 .

[217]  Chao Jin,et al.  Progress in the production and application of n-butanol as a biofuel , 2011 .

[218]  Kevin M. Smith,et al.  Metabolic engineering of Escherichia coli for 1-butanol production. , 2008, Metabolic engineering.

[219]  Imad A. Khalek,et al.  Particle Emissions from a 2009 Gasoline Direct Injection Engine Using Different Commercially Available Fuels , 2010 .

[220]  K. Reardon,et al.  Physiochemical Property Characterization of Hydrous and Anhydrous Ethanol Blended Gasoline , 2018, Industrial & Engineering Chemistry Research.

[221]  Combustion and Emissions of Ethanol Fuel (E100) in a Small SI Engine , 2003 .

[222]  Dimitrios Moshou,et al.  Emissions characteristics of spark ignition engine operating on lower–higher molecular mass alcohol blended gasoline fuels , 2013 .

[223]  Jingping Liu,et al.  The heat release analysis of bio-butanol/gasoline blends on a high speed SI (spark ignition) engine , 2013 .

[224]  C. Lee,et al.  Emissions Characteristics of Neat Butanol Fuel Using a Port Fuel-Injected, Spark-Ignition Engine , 2011 .

[225]  E. Green.  Fermentative production of butanol--the industrial perspective. , 2011, Current opinion in biotechnology.

[226]  José Ricardo Sodré,et al.  Compression ratio effects on an ethanol/gasoline fuelled engine performance , 2011 .

[227]  Michael Frenklach,et al.  Reaction mechanism of soot formation in flames , 2002 .

[228]  Tommaso Lucchini,et al.  CFD Modelling of Gasoline Sprays , 2005 .

[229]  T. Ezeji,et al.  Bioproduction of butanol from biomass: from genes to bioreactors. , 2007, Current opinion in biotechnology.

[230]  Ta-Hui Lin,et al.  Cold-start emissions of an SI engine using ethanol-gasoline blended fuel , 2011 .

[231]  J. Liao,et al.  Improvement of isopropanol production by metabolically engineered Escherichia coli using gas stripping. , 2010, Journal of bioscience and bioengineering.

[232]  Yanping Zhang,et al.  Introducing a single secondary alcohol dehydrogenase into butanol-tolerant Clostridium acetobutylicum Rh8 switches ABE fermentation to high level IBE fermentation , 2012, Biotechnology for Biofuels.

[233]  S. M. Sarathy,et al.  Effects of fuel branching on the propagation of octane isomers flames , 2012 .

[234]  Gholamhassan Najafi,et al.  Optimization of performance and exhaust emission parameters of a SI (spark ignition) engine with gasoline–ethanol blended fuels using response surface methodology , 2015 .

[235]  Keith Schofield,et al.  Large Scale Chemical Kinetic Models of Fossil Fuel Combustion: Adequate as Engineering Models—No More, No Less , 2012 .

[236]  T. Foust,et al.  Effects of dual-alcohol gasoline blends on physiochemical properties and volatility behavior , 2019, Fuel.

[237]  Bernd Fusshoeller,et al.  Strategies Towards Meeting Future Particulate Matter Emission Requirements in Homogeneous Gasoline Direct Injection Engines , 2011 .

[238]  Thomas G. Leone,et al.  High octane number ethanol–gasoline blends: Quantifying the potential benefits in the United States , 2012 .

[239]  S. Shuai,et al.  Influence of Methanol Gasoline Blend Fuel on Engine and Catalyst Performance , 2009 .

[240]  Naomi Zimmerman,et al.  Assessing the Climate Trade-Offs of Gasoline Direct Injection Engines. , 2016, Environmental science & technology.

[241]  Shenghua Liu,et al.  Study of spark ignition engine fueled with methanol/gasoline fuel blends , 2007 .

[242]  Jack B. Howard,et al.  Formation of polycyclic aromatic hydrocarbons and their growth to soot—a review of chemical reaction pathways , 2000 .

[243]  Min Xu,et al.  Atomization and vaporization for flash-boiling multi-hole sprays with alcohol fuels , 2012 .

[244]  T. Ezeji,et al.  Acetone butanol ethanol (ABE) production from concentrated substrate: reduction in substrate inhibition by fed-batch technique and product inhibition by gas stripping , 2004, Applied Microbiology and Biotechnology.

[245]  M. Wooldridge,et al.  Effects of Ethanol on In-Cylinder and Exhaust Gas Particulate Emissions of a Gasoline Direct Injection Spark Ignition Engine , 2015 .