Surface studies by reversed-flow inverse gas chromatography: A review

Gavril, Dimitrios

doi:10.1016/j.cattod.2010.04.017

Cited by 16 publications

(8 citation statements)

References 43 publications

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“…The application of RF-GC is to determine the physicochemical properties of samples such as of rate coefficients 17 and diffusion coefficients 18 , mass transfer coefficients 19 and activity coefficients [18][19] has been reported earlier. Thus, concerning the literatures mentioned above, the objective of the study was to determine the evaporation rate and diffusion coefficient of the selected hydrocarbon liquids which is most likely pollutant to the environment.…”

Section: Introductionmentioning

confidence: 99%

Determination of Diffusion Coefficients of Selected Long Chain Hydrocarbons using Reversed‐ Flow Gas Chromatographic Technique

Khalid

Khan

Zain

2011

Journal of Chemistry

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The reversed-flow gas chromatography (RF-GC) technique was used to study the evaporation rate and estimating the diffusion coefficient of samples. The RF-GC system comprises of six-port valve, sampling and diffusion column, detector and modified commercial gas chromatography machine. Selected long chain of hydrocarbons (99.99% purity) was used as samples. The solute (stationary phase) were carried out by carrier gas (mobile phase) to the detector. The data obtained from the RF-GC analysis were analysed by deriving the elution curve of the sample peaks using mathematical expression to find the diffusion coefficients values of respective liquids. The values obtained were compared with theoretical values to ensure the accuracy of readings. The interesting findings of the research showed the theoretical values of equilibrium at liquid-gas interphase lead to profound an agreement with the experimental evidence, which contributes for the references of future studies.

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Section: Introductionmentioning

confidence: 99%

Determination of Diffusion Coefficients of Selected Long Chain Hydrocarbons using Reversed‐ Flow Gas Chromatographic Technique

Khalid

Khan

Zain

2011

Journal of Chemistry

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“…With the increasing of 14 environmental protection awareness, the regulation on sulfur 15 content in gasoline becomes more and more stringent. The present 16 sulfur specification of gasoline in the European Union is 10 ppm at 17 maximum [3]. And in China, the new ''China V'' standard will be 18 executed in 2018, which also sets the sulfur content for gasoline 19 at no more than 10 ppm.…”

Section: Q2mentioning

confidence: 99%

Solution and diffusion properties of organic sulfur in poly[bis(phenoxy)phosphazene] by inverse gas chromatography

Zhang

Wang

et al. 2015

Journal of Industrial and Engineering Chemistry

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“…In this way, a repeated sampling of slow rate processes taking place within the chromatographic column can be carried out. Using suitable mathematical analysis of the experimentally obtained chromatographic data, a big amount of physicochemical parameters have been estimated among the others: adsorption equilibrium constants, gas diffusion coefficients in binary and ternary mixtures, activity coefficients, mass transfer coefficients on solids and liquids, solubility and interaction parameters in polymer-solvent systems, molecular diameters and critical volumes in gases, Lennard-Jones parameters, as well as rate constants and activation parameters [32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51].…”

Section: Introductionmentioning

confidence: 99%

Determination of Lewis Acid Base Properties of Poly(α-n-alkyl) Methacrylates Adsorbed on Silica by Inverse GC

Hamieh

2011

Chromatographia

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In this paper, the acid base properties in the Lewis terms of poly(a-n-alkyl) methacrylates and when they are adsorbed on silica, were determined. The acid base constants K A and K D of various polymers were calculated by testing the classical model and proposed a new model giving K A and K D and a third constant K reflecting the amphoteric character of our solid substrates and obtaining more precise and quantified results. When the length of alkyl group in side chain of poly(a-n-alkyl) methacrylates changes, the surface properties of such polymers also change and consequently affect all superficial characteristics and especially the acid base constants and the transition phenomena. It was also proved that the specific enthalpy was directly correlated to the acid base constants, the carbon atom number in the side chain of poly(a-n-alkyl) methacrylates and the acceptor AN and donor DN numbers of electrons of polar organic molecules, by the following relationship: DH sp = DH sp (AN, DN, K D , K A , n SC ).

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Surface studies by reversed-flow inverse gas chromatography: A review

Cited by 16 publications

References 43 publications

Determination of Diffusion Coefficients of Selected Long Chain Hydrocarbons using Reversed‐ Flow Gas Chromatographic Technique

Determination of Diffusion Coefficients of Selected Long Chain Hydrocarbons using Reversed‐ Flow Gas Chromatographic Technique

Solution and diffusion properties of organic sulfur in poly[bis(phenoxy)phosphazene] by inverse gas chromatography

Determination of Lewis Acid Base Properties of Poly(α-n-alkyl) Methacrylates Adsorbed on Silica by Inverse GC

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