№82-25

On the issue of utilization of carbon-containing mining waste

P. Saik¹,        https://orcid.org/0000-0001-7758-1083

O. Dmytruk¹, https://orcid.org/0000-0001-6311-6252

N. Lysyi²          https://orcid.org/0009-0006-7050-0395

¹Dnipro University of Technology, Dnipro, Ukraine

²Lviv State University of Life Safety Educational and Research, Lviv, Ukraine

Coll.res.pap.nat.min.univ. 2025, 82:296-308

Full text (PDF)

https://doi.org/10.33271/crpnmu/82.296

ABSTRACT

Purpose. The purpose of this study is to systematize the physicochemical reactions of gasification of carbon-containing raw materials, to develop equations for evaluating the process efficiency, and to determine the interrelationships between its primary energy and technological parameters.

Methods. The methodology is based on the study of physicochemical reactions during the gasification of carbon-containing materials, through the analysis, generalization, and systematization of scientific data on the mechanisms that occur at the stages of drying, pyrolysis, oxidation, and reduction. To assess the efficiency of the process, graphical dependencies of the main parameters were constructed in relative units (0 – 1) as functions of the degree of carbon conversion into combustible generator gases. Relative parameter values were obtained by normalizing experimental and calculated data to a unified dimensionless scale, which allows generalization of the results and comparison of the energy and technological characteristics of the process, revealing patterns in their interrelation.

Results. Methodological principles for assessing the efficiency of gasification of carbon-containing mining waste have been developed. The interrelationships between the energy and technological parameters of the gasification process have been established. The obtained results reflect the regularities of the transition of the gasification process of carbonaceous feedstock to an energy-efficient mode, which provides a basis for further optimization of its technological conditions and an overall increase in process efficiency.

Originality. The scientific novelty lies in the development of theoretical foundations for analyzing the energy of gasification processes for carbon-containing mining waste. For the first time, an approach has been proposed to represent gasification process parameters in relative units, which ensures the possibility of their comparison and generalization.

Practical implication. A methodology has been developed to evaluate the efficiency of the gasification process by analyzing the interrelationships between its primary energy and technological parameters. This enables the determination of the optimal operating modes of the system, the improvement of its energy efficiency, and the justification of technological solutions for the practical implementation of thermochemical conversion processes of carbon-containing waste.

Keywords: underground gasification, carbon-containing raw materials, mining waste, generator gas, efficiency.

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