Chemistry of the Gasification of Carbonaceous Raw Material

Purpose. Systemize domestic and global experience in the implementation of hydrogen energy technologies and assess the possibility of their implementation in the development of solid fossil fuels with substantiation of the stages and quantitative indicators of hydrogen production. Methods. To achieve the purpose of the work, the authors, based on the analysis of peer-reviewed research literature, summarized the existing technologies of hydrogen energy, and substantiated the methodological toolkit for further research. Results. Based on the domestic and foreign experience of hydrogen production based on fossil fuels, in particular coal, the possibility of further development of the country's fuel and power complex was assessed. The efficiency of global hydrogen production is estimated. The main areas of hydrogen energy technologies improvement are highlighted: disadvantages and advantages. Quantitative indicators of hydrogen production at gasification technology are given and analyzed. It is noted that the cost of the obtained hydrogen is the lowest with coal gasification technologies ($1.63/kg) and biomass ($1.77/kg), and the highest with water electrolysis using non-traditional energy sources: solar – $5.78/kg and wind – $5.89/kg. Originality. Сonsists in the systematization and scientific validity of hydrogen production technologies implementation. The main regularities that allow to characterize the efficiency of the hydrogen technologies implementation are highlighted. In particular, due attention is paid to the study of the combustible gases release (СО, H2, СН4) and ballast gas СО2 depending on the temperature regime of the selected hydrogen production technology. Practical implication. The vectors of the development of the leading energy industry are evaluated. Obtained data on the application of technologies for obtaining water based on solid types of fossil fuels, in particular hard coal. This allows for choosing the optimal direction of their implementation. Technological processes for obtaining hydrogen are described, depending on the raw material and the method of obtaining it. It is proposed to use underground gasification as a promising direction for hydrogen production.

Section: рис 4 динаміка зміни вартості водню залежно від сировиниunclassified

Analysis of hydrogen production technologies and prospects of their development in Ukraine

Saik,

Yankin

2023

“…Загальний вид формування і експлуатації стендової установок при моделюванні процесу підземної газифікації пластів вугілля марки ДГ, Д, Г, в умовах: 1, 2 -Західного Донбасу, 3 -центрального Донбасу У рамках ініціативи Європейської унії, реалізація проєкту: «HUGE: воднева орієнтована підземна газифікація для Європи» вчені з Національного технічного університету "Дніпровська політехніка" обґрунтували можливість підземної газифікації частини кам'яновугільного пласта в умовах шахти "Барбара" у місті Катовіце. Було встановлено параметри матеріально-теплового балансу для моделі процесу газифікації вугільного пласта, а також визначено технологічні та технічні характеристики експериментального шатного газогенератора (ЕШГ), враховуючи геологічні, гідрогеологічні фактори, конфігурацію, структуру та цілісність вугільного пласта [16].…”

unclassified

Aspects of the utilization for the technogenic territory of coal enterprises

Dychkovskyi,

Falshtynskyi,

Pererva

et al. 2023

Purpose. To perform an analysis of domestic and world experience in the implementation of technologies for the utilization of man-made territories of closed coal enterprises after the completion of their operation. Methods. To achieve the purpose, the authors, based on the analysis of scientific research literature concerning the directions of creation the production capacities after the completion of the mines functioning, proposed technologies for the formation of enterprises for the utilization of man-made territories and their further use. Results. The expediency and regularity of creating mining energy-chemical complexes (MEChC) based on closed coal enterprises for the disposal of pollution, secondary resources and energy in man-made territories is substantiated. This will contribute to the acquisition of ecologically clean land area, the use of underground resources, as well as the production of energy and chemical products that meet the needs of the industrial market. Originality. Consists in the systematization and scientific justification of the implementation of technologies for the use of man-made space in closed mines. The main regularities of the scientific means of studying the processes of adaptation of such processes in the mechanical preparation, processing, and energy utilization of secondary raw materials as part of the implementation of MEChCto the real conditions of the underground and surface space of the closed coal mining enterprise are highlighted. Practical implication. Development and establishment of the main technological aspects of the formation of a mining energy-chemical complex with the provision of stable utilization of man-made and energy space of coal mines with the obtaining of usable territories, fuel, technical industrial gases, thermal and electrical energy, and chemical products.

“…Зважаючи на незворотній вплив гірничих та енергетичних підприємств з видобутку та переробки енергоресурсів на природне середовище, нагальною необхідністю є впровадження технологічних процесів з мінімальними викидами і комплексним використанням джерел природної та техногенної енергії. Як показує аналіз світової практики, в області паливно-енергетичного комплексу, такі запаси раціонально добувати і переробляти на місті їх залягання з отриманням енергетичного та хімічного продуктів за технологією свердловинної підземної газифікації вугілля (СПГВ) [3,4]. Розкриті вугільні запаси підготовлюються шахтними газогенераторами.…”

unclassified

Aspects for implementing the cumulative energy systems during underground coal gasification

Falshtynskyi¹,

Saik²,

Dychkovskyi³

et al. 2022

Self Cite

Purpose. An innovative approach formulation to the rational development of the potential of coal mines to expand the economic activity of mining enterprises based on the implementation of underground heat generators during coal gasification. Methods. Based on the conducted analytical and laboratory research, to study the possibility of introducing underground heat generators and cogeneration systems during gasification of coal at the site of its occurrence. The basis for conducting analytical studies is the experience of implementing the specified modules and cogeneration plants. The basis for laboratory research is a laboratory setup that allows modeling the behavior of thermochemical and geomechanical processes in the resulting gas generator, depending on the mining-geological conditions of the coal seam occurrence, methods and ways of supplying injected blast mixtures to the fire face mirror. Findings. Current issues of implementing the cumulative energy systemsbased on mining enterprises are highlighted. It has been determined that a possible basis for expanding the range of economic activity at a coal-mining enterprise is the implementation of underground gasification technology. The main products of the latter are producer gas, thermal energy and chemical raw materials. The parameters of changing the temperature field in the immediate bottom of the underground gas generator and the producer gas temperature at the outlet from the gas production borehole have been studied. On the basis of their changes, the technological schemes of the underground heat generator are proposed. This makes it possible to use technogenic thermal energy both in the process of coal gasification and at the stage of attenuation of an underground gas generator, as well as a scheme of a cogeneration system with heat accumulation from products of borehole underground coal gasification (BUCG). Originality. An innovative approach has been developed to the rational technogenic thermal energy development during coal gasification at the site of its occurrence. Practical implications. The implementation of cumulative energy systems based on underground heat generators during coal gasification at the site of its occurrence and the subsequent use of thermal technogenic environment allow creating compact energy modules that can satisfy the energy needs of a mining enterprise.