Raw data of methane hydrate equilibrium / PXRD measurements in system CH4 – H2O – dimethyl sulfoxide and ice freezing points of DMSO aqueous solutions

The raw data from the measurements of the methane hydrate equilibrium conditions in the methane-water-dimethyl sulfoxide system are given in the “Hydrate equilibrium (CH4-DMSO-H2O)” archive. A total of 54 equilibrium points have been measured. For each of them there is a separate .xlsx file in the archive with columns of numerical values of the following parameters measured by sensors of GHA350 autoclave: time, temperature (°C), gauge pressure (bar), stirrer speed (rpm). The file name represents the system under study and the point number. For example, the file name “5% DMSO_point 13” corresponds to the raw data obtained from measurements of the 13th equilibrium point (numbering from Table 1 of data paper [2]) for a 5 mass% aqueous solution of dimethyl sulfoxide. Cells D1:F3 of each file display numerical values of the masses and feed concentrations of the components in the aqueous phase.
The raw data presented in the archive “PXRD analysis (CH4-DMSO-H2O)” are related to the powder X-ray diffraction study of the phase composition of gas hydrate samples synthesized from DMSO aqueous solutions. Diffractograms were recorded for 3 samples with a mass fraction of dimethyl sulfoxide in aqueous solution of 5, 55, and 20 mass%. For each sample, a separate file containing numerical values of 2θ (degree) and signal intensity (a.u.) is provided.
The raw data from the determination of ice freezing temperatures of aqueous DMSO solutions at atmospheric pressure are given in the “Ice freezing (H2O-DMSO)” archive. The archive includes raw data from sixteen ice freezing point measurements. The file name indicates the mass fraction of DMSO and the point number (numbering from Table 6 of data paper [2]). Each file has a column with the measured temperature values of the sample at the specified time (one temperature reading every two seconds).

The raw data is linked to the papers:
[1] Anton P. Semenov, Rais I. Mendgaziev, Andrey S. Stoporev, Vladimir A. Istomin, Daria V. Sergeeva, Andrey G. Ogienko, Vladimir A.Vinokurov (2021) The pursuit of a more powerful thermodynamic hydrate inhibitor than methanol. Dimethyl sulfoxide as a case study // Chemical Engineering Journal, 423, 130227 DOI: 10.1016/j.cej.2021.130227
[2] Anton P. Semenov, Rais I. Mendgaziev, Andrey S. Stoporev (2023) Dataset for the experimental study of dimethyl sulfoxide as a thermodynamic inhibitor of methane hydrate formation // Data in Brief, 48, 109283 DOI: 10.1016/j.dib.2023.109283