Addition Of Ethanol Research Articles

Mechanisms of oil coalescing through water-filled and air-filled membrane pores

This study demonstrates an investigation of coalescence mechanism of oil droplets in water-filled and air-filled membrane pores in a crossflow filtration. Methanol, ethanol and propanol additives are used to create polyvinylidene fluoride (PVDF) membrane pores through phase inversion process. The air-filled pores are obtained by drying the membrane at temperature 50 °C. Results show that membrane structure transition occurred from short fingerlike (PVDF-M) to long fingerlike (PVDF-E) and drop-shaped macrovoid (PVDF-P) when the diffusivity of additives into water coagulant decreases. The emulsion permeation flux acquired by water-filled pores is higher than that attained by air-filled pores membranes and the flux increases in the manner: PVDF-P > PVDF-E > PVDF-M. The membrane with water-filled pores is more hydrophilic which is able to reduce the fouling. Stearic repulsion plus the crossflow and pressurized effects promote cleavage of oil droplets when small pores membrane is used. The low crossflow and high pressurized effects are preferable to coalescence in larger pores. Capillary effect controls the coalescence in the air-filled pores. In the smallest pores, the coalescence switched to cleavage when crossflow increases and feed pressurized effect reduces with the presence of repulsion effect. The PVDF-E with the relatively small pores appeared a better coalescence than the PVDF-P which possesses the largest pores, due to the capillary motion occurred more desirable in the smaller pores and low pressurized condition.

Modeling of combustion and emissions behavior on the effect of ethanol–gasoline blends in a four stroke SI engine

Researchers are increasingly coming up with creative solutions to reduce fuel consumption and harmful emissions due to the political unrest around crude oil and harsher environmental legislation around the globe. Using gasoline and ethanol blends as substitutes in SI engines is thought to be a promising approach. To lower the cost of experimental test, it is still necessary to provide a model to explore the emissions, performance and combustion of ethanol mixtures in petrol engine under various operating situations. A comprehensive quasi dimensional two zone model was used. This mathematical model could predict and analyze the engine combustion, emissions and performance parameters using MATLAB. The thermal efficiency was improved for E20 by 3%. Ethanol addition decreased SFC value by average 7.2% for E20 with respect to gasoline. In comparison to gasoline, the increases in output power were 1.1%, 3%, 4%, and 5.5% are obtained with E5, E10, E15, and E20. and 45% The highest increases in peak cylinder pressure and cylinder temperature for E20 about gasoline are 14 and 11%, respectively about gasoline. At 2500 rpm, the greatest percentage declines in NOx, CO, and HC emissions for E20 are 3.3, 23.5 and 45% about gasoline. The results of comparing the mathematical model’s validity to those acquired from experimental data and diesel RK software demonstrate that the MATLAB code is appropriate. The mathematical model proved that ethanol blending can be used up to 20% as alternative fuels to improve the gasoline engine performance, combustion and emissions.

Medium-chain fatty acid production from thermal hydrolysed sludge without external electron donor supplementation

In this study, medium-chain fatty acid (MCFA) generation from mixed sludge (including primary sludge and waste activated sludge) was investigated without additional electron donors (EDs). 0.5 g COD/L of MCFAs was produced and the in situ generated ethanol could serve as the EDs during the anaerobic fermentation of mixed sludge without thermal hydrolysis process (THP) pretreatment. THP increased the MCFA production by approximately 128% in the anaerobic fermentation. During 102 days of operation, the fermentation of THP pre-treated mixed sludge stably generated 2.9 g COD/L MCFAs. The self-generated EDs could not maximize MCFA production, and external addition of ethanol improved MCFA yield. Caproiciproducens was the dominant chain-elongating bacteria. PICRUST2 revealed that both fatty acid biosynthesis and reverse β-oxidation pathways could participate in MCFA synthesis, and ethanol addition could enhance the contribution of the reverse β-oxidation pathway. Future studies should focus on the improvement of MCFA production from THP-assisted sludge fermentation.

Study on the nano-morphology and chemical characteristics of soot produced by the combustion of kerosene mixed with ethanol

In this paper, we independently designed and built an experimental platform, including a combustion system and a soot particles collection system. Soot generated inside the flame and soot emitted outside the flame were collected during the combustion of kerosene and kerosene mixed with ethanol fuel. Transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, and thermogravimetry were used to characterize both soot samples. The results show that the addition of ethanol to kerosene, i.e., the formation of mixed fuel, causes the lag of soot emission. With the increase in ethanol addition, the incipient soot particles were generated inside the flame, and small, unoxidized, and heat-aging soot particles were emitted outside the flame. The oxidation activity of soot particles produced by adding ethanol decreased, which was related to their particle size.

Isopropanol accelerated crystallization of AlPO-18 membranes for CO2/CH4 and N2/CH4 separations

The aluminophosphate (AlPO-n) materials are the potential candidates for the gas separations. And the characters of zeolite crystals on membrane commonly affected its separation properties. In this work, a co-solvent strategy was used to tune the crystal growth behaviors on the synthesis of AlPO-18 membrane. Isopropanol (IPA), served as the organic co-solvent, was adopted to prepare the AlPO-18 membrane. The effects of the IPA/DIPEA ratio and the synthesis time on the AlPO-18 membranes preparation were investigated. The crystallization of AlPO-18 membrane was accelerated when adding the extra isopropanol into the initial synthetic gel. A similar acceleration effect also occurred with the addition of methanol or ethanol into the initial gel. Under the same reaction condition, the morphology of the AlPO-18 crystals on membranes tends to develop from flake-like to bulk-like after the addition of the extra IPA, the size of AlPO-18 crystals increased with the increase of IPA/DIPEA molar ratio. Compared with the case of water as sole solvent, the synthetic time for the AlPO-18 membrane with good gas permeation properties was reduced to 12 h, where less template N-Ethyldiisopropylamine (DIPEA) was used. The optimized AlPO-18 membrane exhibited a CO2 and N2 permeance of (9.1, 0.79) × 10−7 mol/(m2∙s∙Pa) with the CO2/CH4 (50/50) and N2/CH4 (50/50) mixture selectivity of 91 and 5.0 at 298 K, 0.2 MPa. Those results may provide a strategy to prepare the AlPO-18 molecular sieve with reduced synthesis times.

Effect of Ethanol Added to Diesel Fuel on the Range of Fuel Spray

The constantly growing number of vehicles sold and operated has resulted in greater contribution of automobiles to global pollution. One way to reduce emissions of carbon dioxide (CO2) and toxic compounds, including the particulates and nitrogen oxides (NOx) contained in exhaust gases, is to use alternative fuels. Within this group of fuels, those of plant origin, mainly alcohols, are attracting more and more attention because of their high oxygen content (around 35%), low viscosity, and good atomisation. However, alternative fuels have different physicochemical properties than diesel fuel, and these may affect the formation of the fuel spray, which, in turn, impacts the operation of the internal combustion engine, operating parameters, and the purity of the exhaust gases emitted into the environment. To make sure this type of fuel can be used in compression ignition engines, it is necessary to gain a thorough understanding of the phenomena and relationships occurring during fuel injection. The study investigated the effect of ethanol added to diesel fuel on the range of fuel spray. Firstly, the kinematic viscosity was determined for diesel fuel, and for diesel–ethanol blends with varying proportional contents of ethanol, up to 30% v/v. The viscosity test was carried out at 40 °C in compliance with the normative requirements. At the next stage, the range of the spray tip was measured for the same fuels in which kinematic viscosity was assessed. A visualisation chamber and a high-speed camera were applied for this purpose. The test was carried out under reproducible conditions, in line with the test methodology used to determine the range of fuel spray. The analyses assessed the effect of ethanol addition on kinematic viscosity and the range of fuel spray. The findings show that the increase in ethanol content corresponds to a decrease in kinematic viscosity by about 4% on average. The results were inconclusive for the lowest injection pressure tested (75 MPa), since some of the mixtures investigated were found with a lower spray range, compared to diesel fuel with no ethanol added. The greatest increase in the spray range (by approximately 39%) was found in the fuel with 30% content of ethanol at an injection pressure of 125 MPa.

Experimental Study on the Ethanol-Assisted Catalytic Steam Reforming of Endothermic Hydrocarbon Fuel.

Thermal protection is a critical problem in the development of hypersonic aircraft. To enhance the thermal protection capability of hydrocarbon fuel, the ethanol-assisted catalytic steam reforming of endothermic hydrocarbon fuel was proposed. The result shows that the total heat sink can be significantly improved by the endothermic reactions of ethanol. A higher water/ethanol ratio can promote the steam reforming of ethanol and further increase the chemical heat sink. The addition of 10 wt % ethanol at 30 wt % water content can improve the total heat sink by 8-17% at 300-550 °C, which is caused by the heat absorption by phase transition and chemical reactions of ethanol. The reaction region of thermal cracking moves backward, resulting in the suppression of thermal cracking. Meanwhile, the addition of ethanol can inhibit the coke deposition and increase the working temperature upper limit of the active thermal protection.

Impact of Non-Saccharomyces Yeast Fermentation in Madeira Wine Chemical Composition

Madeira wine is produced via spontaneous alcoholic fermentation arrested by ethanol addition. The increasing demand of the wine market has led to the need to standardize the winemaking process. This study focuses on identifying the microbiota of indigenous yeasts present during Madeira wine fermentation and then evaluates the impact of selected indigenous non-Saccharomyces as pure starter culture (Hanseniaspora uvarum, Starmerella bacillaris, Pichia terricola, Pichia fermentans, and Pichia kluyveri) in the chemical and phenolic characterization of Madeira wine production. Results showed that the polyphenol content of the wines was influenced by yeast species, with higher levels found in wines produced by Pichia spp. (ranging from 356.85 to 367.68 mg GAE/L in total polyphenols and 50.52 to 51.50 mg/L in total individual polyphenols through HPLC methods). Antioxidant potential was higher in wines produced with Hanseniaspora uvarum (133.60 mg Trolox/L) and Starmerella bacillaris (137.61 mg Trolox/L). Additionally, Starmerella bacillaris stands out due to its sugar consumption during fermentation (the totality of fructose and 43% of glucose) and 15.80 g/L of total organic acids compared to 9.23 g/L (on average) for the other yeasts. This knowledge can be advantageous to standardizing the winemaking process and increasing the bioactive compounds, resulting in the production of high-quality wines.

Spectral-fluorescent and photochemical study of 6,6′-di(benzoylamino)trimethine cyanine dyes in solutions as possible probes for DNA

Spectral-fluorescent and photochemical properties of trimethine cyanine dyes T-304, T-306, and T-307, having substituents in 6,6′-positions, in various organic solvents, in aqueous buffer solutions, in the presence of surfactants and ethanol additives, and the effect on these properties of addition of DNA have been studied. Strong aggregation of the dyes in aqueous and aqueous buffer solutions has been shown. This is due to increased hydrophobicity of the dyes, which makes it difficult to use them as spectral-fluorescent probes for DNA. In the presence of DNA, trimethine cyanines partially form highly fluorescent complexes of dye monomers with the biomolecule, with slight decomposition of the initial aggregates and the formation of aggregates on DNA molecules. The formation of different types of dye–DNA complexes, i.e., intercalation and binding in the DNA grooves, was modeled by molecular docking. Dye–DNA complexes were also studied by circular dichroism spectroscopy and by thermal dissociation of DNA. To reveal selectivity of the dyes, their interaction with human serum albumin was briefly studied. The presence of moderate concentrations of nonionic surfactants does not lead to a significant decomposition of aggregates, but leads to a biphasic dependence of the fluorescence intensity on the DNA concentration. At the same time, ethanol additives (15%) lead to a more or less linear concentration dependence of the fluorescence intensity, which makes it possible to use these dyes as fluorescent probes for DNA. The effective binding constants of the dyes to DNA and the limits of DNA detection using the dyes in the presence of 15% ethanol were estimated. Photoisomerization and generation of the triplet states of T-304, T-306, and T-307 have been also studied. Along with the fluorescence growth, complexation with DNA leads to an increase in the yield of the triplet states of the dyes. This creates a prerequisite for using the dyes in targeted PDT. In the presence of DNA, the decay kinetics of the triplet states are biexponential, which indicates different types of dye complexes with DNA. The rate constants of oxygen quenching of the triplet states of the dyes bound to DNA are significantly lower than the diffusion-controlled values (taking into account the spin-statistical factor), which is explained by the shielding effect on the triplet molecules in complexes with DNA. The data obtained show that dyes T-304, T-306 and T-307, with addition of 15% ethanol, can be used as possible fluorescent probes for DNA.

Effects of aroma additives on the release of smoke during the pyrolysis of reconstituted tobacco

The effects of typical acid and alkaline aroma additives on the release characteristics of aroma components from reconstituted tobacco were studied. In this study, the pyrolysis of reconstituted tobacco samples loaded with different aroma components was carried out, and the aroma components in the smoke were analyzed by the GC-MS. The results showed that adding a certain amount of acid aroma components in reconstituted tobacco could promote the release of aroma components in smoke. However, excessive acid aroma additives could inhibit the Maillard reaction to decrease the formation of additional aroma components during pyrolysis. The addition of ethanol in reconstituted tobacco could promote the release of olefin and acid aroma components in smoke. Alkaline aroma additives (sodium bicarbonate and potassium carbonate) could promote the release of all kinds of aroma components in smoke, because potassium and sodium ions could catalyze the pyrolysis of tobacco, which was preferred to generate aroma components. According to these results, the best promoting effect of the aroma components released in smoke was performed by adding 0.078 wt% of potassium carbonate and 0.01 wt% of citric acid in reconstituted tobacco.

Pressure treatment has a differential effect on cyanide- and ethanol-induced autofluorescence response in yeast.

Cellular processes associated with biological membranes and multimeric associations exhibit pressure sensitivity. In cellular respiration for example, pressure-regulated respiratory oxidases and cytochromes are found in piezophilic microbes, and pressure reduces oxygen consumption rates in eukaryotes. The presence of piezotolerant obligate aerobic yeasts in deep sea environments further justifies investigating pressure effects on cellular respiratory mechanisms. Ambient pressure analysis of UV-excited autofluorescence signals used for monitoring respiratory metabolism have identified multiple cellular NADH and NADPH conformations, significant because the distribution of conformational forms depends on metabolic conditions. Here, we use UV-excited autofluorescence spectroscopy with the spectral response quantified using phasor analysis to monitor cellular NADH and NADPH conformation in Saccharomyces cerevisiae (baker's yeast) suspensions after 30-minute pressure treatment at up to 11 kpsi (75.8 MPa). Specifically, we investigate the effects of pressure treatment on the autofluorescence response to the additions of cyanide and ethanol (both respiratory inhibitors at ambient pressure). The autofluorescence response to cyanide measured 30 min after pressure release shows a diminished response, while the response to ethanol shows no detectable difference when compared with the response prior to pressure treatment. Conditions for this study are similar to those previously reported to activate transcription factors in yeast due to pressure-induced stress tolerance, suggesting autofluorescence may be useful for assessing mitochondrial functional under induced stress-tolerance conditions.

Methanol, isobutanol, kerosene, dimethylfuran, ethanol, and isopropanol additives effects on soot concentration at hydrogen-enriched methane flames

One exciting research topic is biofuels’ effects on soot formation. For this purpose, the combustion behavior of different biofuel pairs, with the main fuel being hydrogen-enriched methane, was investigated in a burner, using laser-induced incandescence (LII). The soot concentrations in several flames were observed for methanol, isobutanol, kerosene, dimethylfuran, ethanol, and isopropanol fuels coupled with hydrogen-enriched methane. Soot concentration was determined for the additive fuels and the effects of soot particles in the flame and Reynolds number on the flame oscillation and soot interaction were examined. The highest soot formation was observed in the h-methane + kerosene and led to large soot fractal aggregates. The isobutanol has 8.8% higher Re sensitivity for oscillation than isopropanol for soot concentration. Also, isobutanol causes a higher amount of soot production as Re increases. The flame area/soot area ratio decreases 1.7 times faster with dimethylfuran usage compared to kerosene. The dimethylfuran created a higher soot field in the flame by 23.9% compared to methanol and 25.9% compared to ethanol. At the tests, the lowest soot concentration was observed in the addition of isopropanol in hydrogen-enriched methane flame.

Application Characteristics of Bioethanol as an Oxygenated Fuel Additive in Diesel Engines

In this study, pure diesel fuel (E0), 5% bioethanol blended with 95% diesel fuel (E5), 10% bioethanol blended with 90% diesel fuel (E10) and 15% bioethanol blended with 85% diesel fuel (E15) were tested on a diesel engine. The 40, 60 and 80 Nm were the main experimental variables, while the engine speed was kept constant at 1500 rpm. The main results show that the addition of ethanol slightly reduced the maximum combustion pressure and delayed the combustion start, but increased the heat release rate (HRR) to varying degrees. Although the addition of ethanol was not very helpful for reducing hydrocarbon (HC), it could reduce carbon monoxide (CO) under appropriate load conditions (60 Nm and 80 Nm). Additionally, nitrogen oxides (NOx) and smoke emissions were reduced with the addition of ethanol under all test conditions.

Batch Crystallization of Xylitol by Cooling, Evaporative, and Antisolvent Crystallization.

Four different techniques for xylitol crystallization, namely cooling, evaporative, antisolvent, and combined antisolvent and cooling crystallization, were investigated regarding their influence on the product crystal properties. Various batch times and mixing intensities were studied, and the antisolvent used was ethanol. Real-time monitoring of the count rates of various chord length fractions and distributions using focused beam reflectance measurement was conducted. Several solid characterization methods were used for studying the crystal size and shape, such as scanning electron microscopy and laser diffraction-based crystal size distribution analysis. Crystals ranging in size from 200 to 700 μm were obtained based on the analysis results by laser diffraction. The dynamic viscosity of saturated and undersaturated xylitol solution samples was measured; the density and refraction index were measured to determine the xylitol concentration in the mother liquor. Saturated xylitol solutions were found to have relatively high viscosities up to 129 mPa s in the studied temperature range. Viscosity can have a key role in crystallization kinetics, especially in cooling and evaporative crystallization. Mixing speed had a great influence, mainly on the secondary nucleation mechanism. The addition of ethanol decreased the viscosity, resulting in more uniform crystal shape and better filterability.

Structural evolution of the butylated hydroxytoluene/menthol hydrophobic eutectic solvent upon methanol and ethanol cosolvent addition

The changes upon methanol (MeOH) and ethanol (EtOH) addition in the structural arrangement of the hydrophobic eutectic solvent formed by butylated hydroxytoluene (BHT) and L-menthol (MEN) in 1:3 M ratio have been studied using molecular dynamics (MD) simulations integrated by small- and wide-angle X-ray scattering (SWAXS) measurements. Different mixtures containing the eutectic solvent and a variable amount of MeOH and EtOH have been investigated and the cosolvent introduction at any concentration has been found to break the hydrogen-bonds (H-bonds) among the MEN molecules, that are the most relevant interactions in the pristine eutectic, while the BHT component remains substantially non-interacting through all the explored composition range. This H-bond network is replaced by interactions between the MEN component and the cosolvent molecules, where the MEN species acts preferentially as H-bond donor towards the MeOH and EtOH molecules that behave mostly as H-bond acceptors. An increasing interplay between the excess cosolvent molecules is also observed upon increasing their concentration. SWAXS data show a contraction of the electron-dense regions corresponding to the hydroxyl groups upon cosolvent addition. This evidence is compatible with the intercalation of the MeOH and EtOH molecules in the MEN-MEN H-bond network to promote MEN-cosolvent and cosolvent-cosolvent interactions, in agreement with the MD results.

Investigation on crystal growth behavior of La0.8Sr0.2FeO3 nanopowders fabricated with different organic additions

The crystal growth behavior of the perovskite-type La0.8Sr0.2FeO3 nanopowders fabricated via sol–gel process was controlled by adjusting the addition of acetic acid (HAc) and ethanol. As a result, the La0.8Sr0.2FeO3 with a stable orthorhombic structure was fabricated with high ethanol content after heat treatment at 1200 °C. Based on the relationship between the crystal size and heat-treatment temperature, the crystal growth rate of La0.8Sr0.2FeO3 powders at the low-temperature stage was much larger than that at the high-temperature stage. Correspondingly, the activation energy for crystal growth of the La0.8Sr0.2FeO3 powders was increased firstly and then decreased with the increase of HAc or ethanol content in the raw solution, owing to different hydrolysis rates in the H2O/ethanol system. The lowest activation energy for crystal growth at the low-temperature stage ((15.25 ± 0.23)kJ/mol) and high-temperature stage ((5.74 ± 0.01)kJ/mol) were obtained by controlling the molar ratio of HAc/Metal ions with 4:1 and the volume ratio of ethanol/H2O with 3:1.

Changes of Some Physicochemical Properties of Canola Oil by Adding n-Hexane and Ethanol Regarding Its Application as Diesel Fuel

Canola oil cannot be directly used as a fuel in diesel engines because its physicochemical properties differ considerably from those of diesel oil. Therefore, the studies were intended to make closer the surface tension, viscosity and density of the canola oil to those of diesel fuel by adding n-hexane and ethanol. The surface tension and its components as well as density and viscosity were determined not only for the canola oil mixtures with n-hexane and ethanol but also for the canola oil components. The surface tension components were determined based on the contact angle measurements on PTFE. To obtain the components and parameters of saturated fatty acids, the contact angles of water, diiodomethane and formamide on their layers were measured. The contact angles of the studied mixtures were also measured on the engine valve. The obtained results and theoretical considerations allowed us to explain why the values of the surface tension, density and viscosity of canola oil are higher than those for its components. They also contributed to the explanation of the mechanism of the reduction in these quantities for canola oil by the addition of n-hexane and ethanol. It appeared, for example, that viscosity of the canola oil mixture with 20% n-hexane contacted with ethanol is close to that of diesel fuel.

Influence of high compression ratio and hydrogen addition on the performance and emissions of a lean burn spark ignition engine fueled by ethanol-gasoline

This paper investigates the effect of ethanol-gasoline-hydrogen in a lean-burn SI engine with different proportions such as E5, E10, E20, E30, and E40 at compression ratio 10.5:1. The results infer that the E10 blend is the optimized one. Further, E10 mixture investigates for 5% and 10% hydrogen addition on energy basis. Overall, this study establishes that the addition of ethanol enhances brake power by 9% and brake thermal efficiency by about 7%. Hydrogen enrichment to E10 mixture shows a significant enhancement in brake power and brake thermal efficiency at a lower equivalence ratio. Further, it observes that the lean limit had extended to a 0.47 equivalence ratio compared to a 0.5 equivalence ratio with the E10, and 0.54 with pure gasoline. The addition of hydrogen to E10, improves the combustion process and heat release rate while it reduces cycle-by-cycle variations and hydrocarbon emissions.

Effects of Engine Load and Ternary Mixture on Combustion and Emissions from a Diesel Engine Using Later Injection Timing

As a high oxygenated fuel, bioethanol has already obtained more and more widespread attention in diesel engines. The present work aims to study and compare effects of various diesel-bioethanol-biodiesel ternary mixture fuels on combustion and emissions from a four-cylinder diesel engine. A series of engine experiments are conducted on neat diesel fuel (D100), 95% D100 blended with 5% bioethanol and 1% biodiesel by volume (D95E5B1), 90% D100 blended with 10% bioethanol and 1% biodiesel by volume (D90E10B1), and 85% D100 blended with 15% bioethanol and 1% biodiesel by volume (D85E15B1) according to various engine loads (40, 80 and 120 Nm). The experimental results show that the peak value of pressure and heat release rate (HRR) in the cylinder, nitrogen oxides (NOx) and smoke emissions increase with the increase in engine load, but the brake specific fuel consumption (BSFC) decreases. There is no significant variation in cylinder pressure with the addition of ethanol, but HRR is improved and NOx and smoke emissions are effectively controlled. It is exciting that the addition of ethanol can simultaneously reduce NOx and smoke emissions under medium and high load conditions. Specifically, at 120 Nm, ethanol addition simultaneously reduces NOx emissions by 2.08% and smoke opacity by 36.08% on average. Through the results of this study, it is found that the ethanol can improve the combustion of the four-cylinder diesel engine and also effectively control the emissions of NOx and smoke. Therefore, ethanol will play an important role in the future research field of energy saving and emission reduction for diesel engines.

Effect of ethanol on auto-ignition characteristics and laminar burning velocity of gasoline under elevated temperature and pressure

Gasoline and its surrogate fuels have developed rapidly in recent years, and the study of the theory of multi-fuel mixed combustion is vital to the improvement of power machines. On the basis of the important role of ethanol-gasoline mixtures in oxygenated alternative fuels, Cai and Pitsch’ s mechanism was selected for a numerical study to research the important role of ethanol with respect to combustion of gasoline from a chemical kinetic perspective. It is found that the addition of ethanol accelerates the LBV and shortens the IDTs of gasoline, and the LBV of ethanol-gasoline mixtures goes up as both the initial temperature and the ethanol ratio rise, while the LBV of ethanol-gasoline mixtures declines as the initial pressure increases. The IDTs of ethanol-gasoline mixtures tend to decrease as the initial temperature, ethanol ratio and initial pressure increase. The addition of ethanol increases the production of the intermediates CH3, HCO and CH2O, and the reactive radicals in the system increase with the addition of ethanol. In addition, the addition of ethanol can lead to an earlier surge of OH groups. This study is not only helpful for the design of ethanol-gasoline power engines, but also promotes the development of alternative fuels.