Vapour pressure measurements and predictions for alcohol–gasoline blends

Pumphrey, J. A.; Brand, Jennifer; Scheller, William A.

doi:10.1016/s0016-2361(99)00284-7

Cited by 98 publications

(61 citation statements)

References 11 publications

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“…Different values of vapour pressure appear in the literature. For example, in [4], at 311K, the measured value is 20.28 kPa, while in [21] and [22], the values are 15.8 and 15.84 kPa, respectively.…”

Section: Vapour Pressurementioning

confidence: 99%

“…The lower vapour pressure reduces "startability" in port fuel-injected engines. However, it is suggested in [4] that the vapour pressure of ethanol-gasoline blends can be increased above that of gasoline alone if the mole percentage of gasoline in the blend exceeds about 35, at 311K. The same stoichiometry necessitates higher fuelling rates.…”

Section: Introductionmentioning

confidence: 99%

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Explosion bomb measurements of ethanol–air laminar gaseous flame characteristics at pressures up to 1.4MPa

Bradley

Lawes

Mansour

2009

Combustion and Flame

184

102

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The principal burning characteristics of a laminar flame comprise the fuel vapour pressure the laminar burning velocity, ignition delay times, Markstein numbers for strain rate and curvature, the stretch rates for the onset of flame instabilities and of flame extinction for different mixtures. With the exception of ignition delay times, measurements of these are reported and discussed for ethanol-air mixtures. The measurements were in a spherical explosion bomb, with central ignition, in the regime of a developed stable, flame between that of an under or over-driven ignition and that of an unstable flame. Pressures ranged from 0.1 to 1.4 MPa, temperatures from 300 to 393K, and equivalence ratios were between 0.7 and 1. 3

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Section: Vapour Pressurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Explosion bomb measurements of ethanol–air laminar gaseous flame characteristics at pressures up to 1.4MPa

Bradley

Lawes

Mansour

2009

Combustion and Flame

184

102

View full text Add to dashboard Cite

show abstract

“…Though ethanol blended gasoline has its own advantages, there are certain issues associated with its usage. Blending of ethanol leads to formation of azeotrope with lower boiling point which results in higher volatility of blend and its higher vapor pressure [1,2]. Ethanol molecules can also result in breaking bond between resins and fillers in fiberglass gas tanks, causing them to leak, resulting in sticking of resins to valves and other internal engine parts causing deposits and clogged intake valves.…”

Section: Introductionmentioning

confidence: 99%

Compatibility Studies on Elastomers and Polymers with Ethanol Blended Gasoline

et al. 2014

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This paper reports the compatibility studies of 10% ethanol blended gasoline (E10) with four types of elastomer materials, namely, Neoprene rubber, Nitrile rubber, hydrogenated Nitrile butadiene rubber (HNBR), and Polyvinyl chloride/Nitrile butadiene rubber blend (PVC/NBR), and two types of plastic materials, namely, Nylon-66 and Polyoxymethylene (Delrin). These materials have applications in automotives as engine seals, gaskets, fuel system seals and hoses, and so forth. Two types of the ethanol blended gasoline mixtures were used: (a) gasoline containing 5% ethanol (E5), which is commercial form of gasoline available in India, and (b) gasoline containing 10% ethanol (E10). The above materials were immersed in E5 and E10 for 500 hrs at 55 ∘ C. A set of eight different properties in E5 and E10 (visual inspection, weight change, volume change, tensile strength, percent elongation, flexural strength, impact strength, and hardness) were measured after completion of 500 hrs and compared with reference specimens (specimens at 55 ∘ C without fuel and specimens at ambient conditions). Variation observed in different materials with respect to the above eight properties has been used to draw inference about the compatibility of these elastomeric/polymer materials with E10 fuel vis-à-vis E5 fuels. The data presented in this study is comparative in nature between the results of E10 and E5.

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“…Some of these changes reported in the literature are variations of free phase measurements in monitoring wells, co-solvency effects that render the BTX dissolution capacity higher in presence of ethanol, preferable biodegradation of ethanol in gasohol plumes, which causes anoxic conditions for BTX degradation [3,4] and effects of gasohol contamination [5,6]. Other studies focus on the thermodynamic properties of ethanol and gasoline-blended fuel, behavior of entrapped petroleum products in the subsurface, and soil vapor extractions systems [7][8][9] or measurements of the vapor pressure enhancement of alcohols-gasoline blends [10]. Thus, despite the well-known harmful effects of BTX in the atmospheric environment, the quantitative analysis of the influence of the ethanol on the evaporation rates of each individual chemical is still lacking in the literature.…”

Section: Introductionmentioning

confidence: 99%

Volatilization of benzene from gasoline: the effect of ethanol blends

Fedrizzi¹,

Lovatel²,

Vieceli³

et al. 2010

WIT Transactions on Ecology and the Environment

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In this work experiments were performed with vapor collection in columns to assess the evaporation profile of benzene from gasoline-ethanol blend fuels. The vapors from two columns simulating gasoline-contaminated soils (with and without ethanol) were monitored for 77 d. The instrumental analysis was performed by Gas Chromatography (GC) with a Flame Ionization Detector (FID). Compound identification was based on the GC retention times of standard BTX (benzene, toluene and xylenes). The concentration of benzene in the vapor phase decreased by 89.09%, considering the entire experimental period, while the toluene and xylene concentrations were increased by 239.34 and 251.78%, respectively. These results suggest that the benzene evaporation behavior was affected by the interactions among ethanol and other aromatic compounds. These results are particularly important, since ethanol is an alternative to gasoline blends. Furthermore, benzene (a well known carcinogen) was retained in the liquid phase and, in this way, can reach the underground water sources. These findings can point out necessary changes in traditional risk models for soil spills that are based on compound concentrations in the environment.

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Vapour pressure measurements and predictions for alcohol–gasoline blends

Cited by 98 publications

References 11 publications

Explosion bomb measurements of ethanol–air laminar gaseous flame characteristics at pressures up to 1.4MPa

Explosion bomb measurements of ethanol–air laminar gaseous flame characteristics at pressures up to 1.4MPa

Compatibility Studies on Elastomers and Polymers with Ethanol Blended Gasoline

Volatilization of benzene from gasoline: the effect of ethanol blends

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