Measurement of Diffusion Coefficients in Thermodynamically Nonideal Systems

Abstract

Accurate diffusion coefficient data are reported for highly nonideal binary mixtures. The mixtures consist of an alcohol (ethanol, 1-propanol, 1-butanol) dissolved in hexane, cyclohexane, carbon tetrachloride, or toluene. All measurements have been conducted over the whole concentration range at various temperatures, (25, 30, and 35) °C, by means of the Taylor dispersion technique. The uncertainty of the reported data is estimated to be within 3·10-11 m2·s-1.

Synthesis and Characterization of Various-Shaped C60 Microcrystals Using Alcohols As Antisolvents

“…The structural dimensions were also identified as a = 10.02 Å and c = 16.38 Å, which are in close agreement with an hcp structure. Although we still lack a complete explanation for this effect, subtle differences between the alcohols, such as their solubility, diffusion coefficient, and polarity, may account for the formation of different morphologies and crystal structures. , For example, the crystals prepared with methanol or ethanol, both of which have short alkyl chains, exhibited an fcc structure (Figure S2, Supporting Information), whereas the crystals prepared with 1-propanol or 1-butanol, both of which have relatively long alkyl chains, exhibited an hcp structure. In addition to the alcohol type, the diffraction patterns of the crystals changed according to the volume ratio of toluene and alcohol (Figure S3, Supporting Information).…”

Screening of C60 Crystallization Using a Microfluidic System

“…The nondimensional time is defined as t ‘ = t / t D where t is the mixing time and t D is the characteristic time by molecular diffusion. t D = L 2 / D alc where L is the width of the microchannel and D alc is the diffusion coefficient of alcohols to toluene from ref . In all cases, the concentration of C 60 in toluene was constant at 0.58 mg/mL.…”

Prediction of Composition-Dependent Self-Diffusion Coefficients in Binary Liquid Mixtures: The Missing Link for Darken-Based Models

“…To validate our MD simulation data, we compare it to experimental data from the literature. ,,,,,,,− Table S1 in the Supporting Information provides a detailed list of references for the experimental data used in this work. The experimental data sets consist of mutual Fick diffusion coefficients D 12 , self-diffusion coefficients D i ,self , and thermodynamic factors Γ.…”