Vapor−Liquid Equilibria and Interfacial Tensions of the System Ethanol + 2-Methoxy-2-methylpropane

Mejı́a, Andrés; Segura, Hugo; Cartes, Marcela

doi:10.1021/je9004068

Cited by 19 publications

(22 citation statements)

References 23 publications

(39 reference statements)

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“…Equation covers the temperature range from 323.51 to 351.68 K and correlates the data with an average of the absolute percentage deviation (AAPD) of 0.02%. Figure shows the P 0 calculated from eq with the experimental data reported in this work (see Table ), as well as previous data reported for us. , Considering the results from Figure , it is possible to state about the reliability of the eq , which predict very well the values reported previously with an AAPD of 0.2%.…”

Section: Results and Discussionsupporting

confidence: 87%

“…Reliable thermophysical properties such as liquid density, vapor pressure, and interfacial tension for ethanol have been extensively collected in databases such as NIST and DECHEMA and also measured by us in previous works. , Table condenses some reference values for the properties of the pure fluids. However, the vapor pressure is one of the most important data in VLE determinations and provides an extra validation of the used chemicals.…”

Section: Results and Discussionmentioning

confidence: 99%

“…At these thermal conditions, the accuracies of the mole fractions measurements were better than ±0.001. Complementary details related to the devices as well as experimental procedures have been recently discussed in depth in our previous works ,− and references therein.…”

Section: Methodsmentioning

confidence: 99%

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Experimental Determination of Isobaric Vapor–Liquid Equilibrium and Isothermal Interfacial Tensions for the Binary Ethanol + Cyclopentyl Methyl Ether Mixture

Mejı́a

Cartes

2019

J. Chem. Eng. Data

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This work describes the vapor–liquid equilibrium (VLE) data experimentally measured at three isobaric conditions 50, 75, and 94 kPa and over the temperature range from 334 to 375 K and the atmospheric interfacial tensions (IFT) measured at the isothermal of 298.15 K in the whole mole fraction range for the ethanol + cyclopentyl methyl ether binary system. In order to carry out the experimental determinations, a dynamic all-glass Guillespie type cell was used to carry out VLE measurements, whereas a maximum differential bubble pressure tensiometer was used to IFT determinations. Because few experimental data are available for cyclopentyl methyl ether, vapor pressures and interfacial tensions have also been measured over the temperature range 341–378 K and 298–353 K, respectively. According to the experimental results, the binary system ethanol + cyclopentyl methyl ether displays a positive deviation from the Raoult’s law with a minimum temperature azeotropic over the whole explored pressure range. The azeotropic mole fraction increases in ethanol as pressure and/or temperature increases. For the case of interfacial tensions, they display positive deviation from the linear behavior. The measured VLE data of the ethanol + cyclopentyl methyl ether mixture are thermodynamically consistent as stated by the Fredenlund’s test. Additionally, the VLE were well-correlated by classical activity coefficients models (e.g., Wohl, NRTL, Wilson, and UNIQUAC) for all of the measured isobar conditions. The measured interfacial tensions of the mixture were satisfactorily correlated by the Myers–Scott equation.

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Section: Results and Discussionsupporting

confidence: 87%

Section: Results and Discussionmentioning

confidence: 99%

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Experimental Determination of Isobaric Vapor–Liquid Equilibrium and Isothermal Interfacial Tensions for the Binary Ethanol + Cyclopentyl Methyl Ether Mixture

Mejı́a

Cartes

2019

J. Chem. Eng. Data

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“…(3) strong hydrogen bond donating abilities; and (4) markedly low solvent nucleophilicities (Table 1). 11,[16][17][18][19][20][21] a For 97% (w/w) HFIP-H2O. b For 97% (w/w) TFE-H2O.…”

Section: Properties Of Fluorinated Alcohol Solventsmentioning

confidence: 99%

Fluorinated alcohols: powerful promoters for ring-opening reactions of epoxides with carbon nucleophiles

Dover¹,

McDonald²

2021

Arkivoc

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Ring-opening reactions of epoxides with carbon nucleophiles are valuable transformations for constructing functionalized carbon-carbon bonds. Epoxide ring-opening methods typically require Lewis acidic additives and/or strong nucleophiles to overcome the activation barrier for these reactions. Fluorinated alcohol solvents present a desirable alternative, enhancing the efficacy of these reactions with weak and neutral carbon nucleophiles by promoting electrophilic activation of the epoxide. We present here a thorough review of the literature regarding epoxide ring-opening reactions with carbon nucleophiles in fluorinated alcohol solvents, concluding with a few recent examples with aziridines.

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“…The underlying mechanism contributing to this synergistic effect, however, are expected to be slightly different. The heat of vaporization of ethanol (905.2 kJ/kg) [29] is greater than DCPD (295 kJ/kg) [30]. The cooling of the chamber air due to ethanol vaporization would be greater, and will lead to lower chamber temperatures.…”

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confidence: 99%

Evaluation of Anti-Knock Quality of Dicyclopentadiene-Gasoline Blends

Al-Khodaier

Shankar

Waqas

et al. 2017

SAE Technical Paper Series

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Increasing the anti-knock quality of gasoline fuels can enable higher efficiency in spark ignition engines. In this study, the blending anti-knock quality of dicyclopentadiene (DCPD), a by-product of ethylene production from naphtha cracking, with various gasoline fuels is explored. The blends were tested in an ignition quality tester (IQT) and a modified cooperative fuel research (CFR) engine operating under homogenous charge compression ignition (HCCI) and knock limited spark advance (KLSA) conditions. Due to current fuel regulations, ethanol is widely used as a gasoline blending component in many markets. In addition, ethanol is widely used as a fuel and literature verifying its performance. Moreover, because ethanol exhibits synergistic effects, the test results of DCPDgasoline blends were compared to those of ethanol-gasoline blends. The experiments conducted in this work enabled the screening of DCPD auto-ignition characteristics across a range of combustion modes. The synergistic blending nature of DCPD was apparent and appeared to be greater than that of ethanol. The data presented suggests that DCPD has the potential to be a high octane blending component in gasoline; one which can substitute alkylates, isomerates, reformates, and oxygenates. IntroductionCarbon mitigation has motivated the development of downsized spark-ignited light duty engines while simultaneously turbocharging them. The energy requirement from light duty vehicle fleets is expected to decrease by almost 10% from 2014 to 2040 [1], due to engine efficiency gains and increased hybridization. The efficiency of spark ignited engines is connected to the fuel octane index (OI = RON -K*S), where RON is the research octane number, S is the octane sensitivity, and K is an empirical constant that depends on engine operating conditions [2]. Increasing the OI of a fuel would maximize tank-to-wheel carbon reductions [3]. However, refinery processes associated with increasing the fuel's anti-knock quality may have an adverse effect on well-to-tank efficiency and cost, depending on the composition of the blend stocks [4]. The use of renewable cellulosic-derived high octane gasoline blending components, such as ethanol, butanol, furans, or lignin-derived aromatics [5,6,7] are a potential solution to achieving high well-to-wheel efficiency, but significant technical, economical, and environmental challenges are slowing their progress to market.Another possible solution is to optimize the use of petroleum refinery-derived components to increase the anti-knock quality of gasoline. The present gasoline refining process consists of multiple processes -including cracking, alkylation, isomerization, and reformation -to modify the chemical composition of the light and heavy naphtha streams obtained from fractional distillation. The alkylation unit converts low value light compounds, such as isobutane, to higher octane gasoline compounds, mainly C7 and C8 compounds, such as 2,4-dimethylpentane and isooctane. In this unit, sulfuric or hydrofluoric acid...

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Vapor−Liquid Equilibria and Interfacial Tensions of the System Ethanol + 2-Methoxy-2-methylpropane

Cited by 19 publications

References 23 publications

Experimental Determination of Isobaric Vapor–Liquid Equilibrium and Isothermal Interfacial Tensions for the Binary Ethanol + Cyclopentyl Methyl Ether Mixture

Experimental Determination of Isobaric Vapor–Liquid Equilibrium and Isothermal Interfacial Tensions for the Binary Ethanol + Cyclopentyl Methyl Ether Mixture

Fluorinated alcohols: powerful promoters for ring-opening reactions of epoxides with carbon nucleophiles

Evaluation of Anti-Knock Quality of Dicyclopentadiene-Gasoline Blends

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