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Application of gas
hydrate technologies for coal mine methane transportation
K.S. Sai1*
1Dnipro University
of Technology, Dnipro, Ukraine
*Corresponding
author: e-mail: kateryna.sai@gmail.com
Physical and
technical problems of mining production, 2020, (22), 170-184.
https://doi.org/10.37101/ftpgp22.01.012
full
text (pdf)
ABSTRACT
Purpose. Improving the
efficiency of application of gas hydrate technologies for converting coal mine methane into a solid crystalline state with
its subsequent transportation to consumers by intensifying the hydrate
formation process.
Methods. Experimental
studies were carried out in the laboratory of
innovative technologies of the Dnipro University of Technology (Dnipro,
Ukraine). The thermobaric parameters of the hydrate formation process
varied to produce of gas hydrate samples from mine methane by artificial
means. Physical modeling and field experiments were carried out in an ILKA KTK-3000 climate chamber, as
well as on an NPO-5 unit, which made it possible to simulate specified
thermobaric parameters (temperature, pressure). The least squares method was used to determine the linear regression parameters.
Findings. Gas hydrates and
their thermobaric conditions were experimentally obtained
under three variants: free mixing of gas and water in a reactor, forced
mixing of a water-gas mixture and mixing of a water-gas mixture in a
magnetic field. The functional relationship between the initial parameters
of the hydrate formation process is determined for the three options
considered. The adequacy of the constructed models was
verified by calculating the determination coefficient for each model
using the square of the linear correlation coefficient. It is reasonable to
transportation of gas in a solid gas hydrate state due to the effect of
self-preservation, which is safer and economically feasible.
Originality. By mathematical modeling found that the
determination indices for all the considered variants of the hydrate
formation process are larger than the determination coefficients, which
confirms the fact that the parabolic model is more adequate.
Practical implications. The optimal
method for intensification of the hydrate formation process for
substantiating artificially created gas hydrates from coal
mine methane as an alternative energy source is justified.
Keywords: gas hydrate,
methane, crystallization centers,
intensification, effect of self-preservation, transportation
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