Measurement of binary diffusion coefficient of gases and organic vapours by chromatography

Abstract

The binary diffusion of organic vapours such as benzene, nitrobenzene, aniline, n-hexane, acetone, ethyl alcohol and toluene in H,, Ar and N, at different temperatures and the diffusion coefficients of the gas pairs; Ar-0,. Ar-N

Determination of Sulfur Dioxide Diffusion Coefficients in Hydrogen, Helium, and Nitrogen by Reversed-Flow Inverse Gas Chromatography

“…A schematic comparison of this study's experimental D AB exp values with literature data [8][9][10]19 has been already presented in Figures 4 and 5, while these values are listed in Table 5.…”

“…A few experimental coefficient values for sulfur dioxide diffusion in nitrogen and air are available, at 293.2 and 298.2 K, respectively. , Both values have been taken into account in the fitting process resulting in the Fuller–Schettler–Giddings empirical equation. For this reason, the estimation of a FPD molar response has been based on comparing the deviation of experimental diffusivities calculated by FSG equation values .…”

“…Paints provide protection to a substrate against dangerous gases and vapors, such as SO 2 , and the calculation of permeability of paint samples requires solubility and diffusivity data . When referring to the published physical property data, experimental gaseous diffusion coefficients of SO 2 are rare. − …”

A New Method for Measuring the Diffusion Coefficient in a Gas Phase

“…In GC stopped-flow techniques, the decay of a stop peak over time was used to determine the diffusion coefficient with much shorter columns than those used in broadening techniques. 7,8 Reversed-flow techniques, which have sharper peaks, have also been used to measure diffusion coefficients. 9 Although the latter methods are much faster than the former ones, the experiment is still time-consuming.…”

“…In GC broadening techniques, the decay of a gas pulse that had been injected into a GC column with a constant velocity of the carrier gas was used to measure the diffusion coefficient (see the review by Maynard and Grushka). In GC stopped-flow techniques, the decay of a stop peak over time was used to determine the diffusion coefficient with much shorter columns than those used in broadening techniques. , Reversed-flow techniques, which have sharper peaks, have also been used to measure diffusion coefficients . Although the latter methods are much faster than the former ones, the experiment is still time-consuming.…”