Rate coefficients for evaporation of pure liquids and diffusion coefficients of vapors

Karaiskakis, George; Katsanos, Nicholas A.

doi:10.1021/j150660a059

Cited by 52 publications

(47 citation statements)

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“…4. Each sample peak which has been shown earlier [8], produced by two reversals in RF-GC, is symmetrical and its maximum height h from the ending baseline is given by …”

Section: Theoretical Basismentioning

confidence: 98%

“…The apparatus used and the experimental procedure followed have been described elsewhere [8], [9]. A conventional gas chromatograph (Shimadzu, Series GC-14B) with a flame ionization detector (FID) and Shimadzu Solution as the software program was used for this experiment.…”

Section: Techniquesmentioning

confidence: 99%

“…From this plot, at long times an infinite value for the peak height h ∞ can be obtained. This infinity h ∞ value is used for the linearization of the resulting relation [8]:…”

Section: Theoretical Basismentioning

confidence: 99%

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Study the Effect of Imposing Surfactants toward the Evaporation of Low Molecular Weight Alcohol

Mohammad¹,

Zain²,

Rashid³

et al. 2013

IJESD

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Abstract-In thispaper, Reversed-Flow Gas Chromatography (RF-GC) is utilized to investigate the evaporation of low molecular weight alcohol. Evaporation rates as well as the diffusion rates of methanol are determined with a surfactant monolayer on the surface of the liquid; while nitrogen acts as carrier gas, at 313 K. The precision (>99.9%) and accuracy of this investigation demonstrates the potential of current methodologies for environmental impact studies; this is further verified when the results are compared with the available literature. The varying evaporation rates of methanol in the presence of varying amounts of Triton X-100 reflects that application of surfactants do damper the evaporation rates of liquid pollutants; without interference with the former's diffusion coefficients. High amounts of Triton X-100 are required for retardation of evaporation rates, suggesting the formation of a densely packed surface monolayer or the formation of an insoluble monolayer.

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“…4. Each sample peak which has been shown earlier [8], produced by two reversals in RF-GC, is symmetrical and its maximum height h from the ending baseline is given by …”

Section: Theoretical Basismentioning

confidence: 98%

Section: Techniquesmentioning

confidence: 99%

See 1 more Smart Citation

Study the Effect of Imposing Surfactants toward the Evaporation of Low Molecular Weight Alcohol

Mohammad¹,

Zain²,

Rashid³

et al. 2013

IJESD

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“…It is known that fermentation is a continuous process, and taking into account that samples were drawn from the fermentation mixture in different time periods (from the beginning to the end) of this process, we can combine the measured H x values with the H and H x has been already derived [28,34] and has the final form: ( ) 0 0 ln ln…”

Section: Determination Of Rate Constantsmentioning

confidence: 99%

Comparative study of the kinetic approach on the alcoholic fermentation procedure conducted in laboratory and scale-up systems by inverse gas chromatography

Lainioti¹,

Kapolos²,

Koliadima³

et al. 2014

Acta Chromatographica

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Summary.The major objective of the present work was to compare the kinetic study of alcoholic fermentations conducted in the presence of wheat supported biocatalysts in laboratory scale and in a scale-up system of 80 L and to compare these results with those reported in literature. The kinetic study of fermentation processes was accomplished with the technique of reversed flow gas chromatography (RFGC), which is a version of inverse gas chromatography. The wine yeast species used was Saccharomyces cerevisiae AXAZ-1, and fermentations were conducted between 20 and 2°C. At low temperatures, maximal ethanol productivity and fermentation rate were reduced. The rate constants, determined through a mathematical model obtained from RFGC, were higher in the laboratory scale comparing to the scale-up system at the temperatures of 20 and 15°C. However, with the reduction of temperature, both systems presented almost similar values proving the great fermentative ability of immobilized cells even at extremely low temperatures. Activation energies of the alcoholic fermentations in the two systems presented their higher values at the second phase (stationary) compared to those observed at the other two phases (growth and decline).

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“…Initially, the RFGC method was designed for the measurement of the kinetic parameters of chemical reactions on the surface of the adsorbent-catalyst in chromatographic column-reactors . However, subsequently, the application of this method was greatly extended and RFGC was used to investigate the physiochemical properties of samples, such as the rate of coefficients (Karaiskakis & Katsanos 1984;Khalid et al 2012), diffusion coefficients (Atta et al 2002;Karaiskakis & Katsanos 1984;Khalid et al 2011), mass transfer coefficients (Gavril & Karaiskakis 1997;Karaiskakis et al 1986;Katsanos et al 1988), activity coefficients (Agathonos & Karaiskakis 1989a, 1989bKatsanos et al 1985) and kinetic study of oxygen adsorption over supported catalysts (Dimitrios et al 2012). Furthermore, this methods is also applied in separation for the growth phases of microbes (Lainioti et al 2010) and surface studies (Gavril 2010;Metaxa et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Establishment of Physicochemical Measurements of Water Polluting Substances via Flow Perturbation Gas Chromatography

Mohammad¹,

Zain²,

Khan³

et al. 2014

JSM

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Rate coefficients for evaporation of pure liquids and diffusion coefficients of vapors

Cited by 52 publications

References 0 publications

Study the Effect of Imposing Surfactants toward the Evaporation of Low Molecular Weight Alcohol

Study the Effect of Imposing Surfactants toward the Evaporation of Low Molecular Weight Alcohol

Comparative study of the kinetic approach on the alcoholic fermentation procedure conducted in laboratory and scale-up systems by inverse gas chromatography

Establishment of Physicochemical Measurements of Water Polluting Substances via Flow Perturbation Gas Chromatography

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