scholarly journals OPTIMIZATION OF ENERGY EFFICIENCY OF A HEAT RECUPERATOR ON THE BASIS OF UNDERGROUND COAL GASIFICATION

2021 ◽  
Author(s):  
Volodymyr Falshtynskyi ◽  
◽  
Pavlo Saik ◽  
Roman Dychkovskyi ◽  
Vasyl Lozynskyi ◽  
...  
Keyword(s):  
Thermal Energy ◽  
Coal Gasification ◽  
Coal Mines ◽  
Energy Generation ◽  
Field Studies ◽  
Underground Coal Gasification ◽  
Gas Generator ◽  
Environmental Friendliness ◽  
Heat Recuperator ◽  
Gasification Products

Mining of the off-balanced and balanced reserves of mines, being under closure or completing their operation, required the implementation of mobile, complex, and environmentally friendly development technologies based on the processes of well underground coal gasification (WUCG) that unites mining of coal and its energy-chemical use. Environmental friendliness of the WUCG process is possible due to its controllability, hermeticity of the underground gas generator, and complex use of cogeneration technologies in the closed cycle of purification and processing of gasification products. The set engineering tasks were performed using analytical studies, bench studies and field studies. Efficiency of thermal energy generation were studies using rocks enclosing the underground gasifier and generator gases. These sources being the basic heat generating segments of energy chemical complex for coal gasification being formed at the territories of operating coal mines or mines at the stage of their closure. Prospects of coal gasification and thermal energy generation using rock disposals of coal mines have been estimated.

ACTIVATION OF UNDERGROUND COAL GASIFICATION WITH THE CONSIDERATION OF THE MODE OF THE UNDERGROUND GAS GENERATOR

2020 ◽  
Author(s):  
V Falshtynskyi ◽  
M Lozynska ◽  
D Lozynska
Keyword(s):  
Coal Gasification ◽  
Underground Coal Gasification ◽  
Gas Generator

scholarly journals Techno-economic analysis of producing low heating value underground coal gasification gas in Indonesia

2021 ◽  
Vol 882 (1) ◽  
pp. 012081
Author(s):  
M. Huda ◽  
S. Salinita ◽  
Zulfahmi ◽  
N Madiutomo ◽  
E Handayani
Keyword(s):  
Coal Gasification ◽  
Financial Analysis ◽  
Operating Cost ◽  
Coal Mines ◽  
Economic Feasibility ◽  
Open Pit ◽  
Selling Price ◽  
Underground Coal Gasification ◽  
Discounted Cash Flow ◽  
Heating Value

Abstract Indonesia is currently reviewing the use of underground coal gasification (UCG) technology to utilize deep-seated coal. UCG may exploit the coal deposit that is not feasible for open-pit mines due to its great depths. In this study, the UCG plant in two coal mines, the Kideco Jaya Agung (KJA) and the Indominco (IMM) coal mines, will be compared their economics in producing low heating value gas with a capacity of 170,000 MJ/hour. The UCG plants implement the linking vertical well (LVW) technique combined with reverses combustion linking (RCL). The discounted cash flow (DCF) method is used for financial analysis to determine the minimum selling price of UCG low heating value gas. The study aims to understand the economic feasibility of applying UCG technology to Indonesia’s different characteristics of coal deposits. The results show the minimum prices of the low heating value UCG gas of KJA and IMM UCG plants are USD 3/MMBTU and USD 3.57/MMBTU, respectively. The operating cost of the IMM UCG is higher than that of the KJA UCG plant due to its thinner and deeper coal seams.

Conditions of Suitability of Coal Seams for Underground Coal Gasification

2020 ◽  
Vol 844 ◽  
pp. 38-48
Author(s):  
Gennadiy Pivnyak ◽  
Volodymyr Falshtynskyi ◽  
Roman Dychkovskyi ◽  
Pavlo Saik ◽  
Vasyl Lozynskyi ◽  
...  
Keyword(s):  
Coal Gasification ◽  
Mining Area ◽  
Underground Coal Gasification ◽  
Technical Documentation ◽  
Gas Generator ◽  
Coal Seams ◽  
Experimental Development ◽  
Coal Mining Area ◽  
Underground Gasification ◽  
National University

Results of evaluating the suitability of certain sections of Western Donbas coal seams, based predominately on properties of coal material, for their further experimental development by means of underground gasification method are represented. Criteria to evaluate both expediency of underground gasification and specific conditions of that process are substantiated basing upon the methodology developed at the National Mining University (Dnipro, Ukraine) together with representatives from National University of Saint Augustine (Arequipa, Peru). The methodology has been industrially approved with the confirmation of its efficiency while developing technical documentation for underground gasification projects: “Project of experimental section of Pidzemgaz station of Pavlogradvuhillia association”, “Feasibility study of the expediency of the construction of Pidzemgaz station” FS 3858-PZ”, Synelnykovo deposit; “Project on experimental underground gas generator”, Monastyryshche deposit, FS of experimental module of UCG station of Solenovske coal-mining area, Donbas. Also, they contain the researches, which were conducted within the project GP – 489, financed by Ministry of Education and Science of Ukraine.

Coal seam gas legislation of Queensland

2009 ◽  
Vol 49 (2) ◽  
pp. 590
Author(s):  
Paul Careless
Keyword(s):  
Coal Seam ◽  
Coal Gasification ◽  
Regulatory Regime ◽  
Underground Coal Gasification ◽  
Coal Seam Gas ◽  
Land Access ◽  
Exploration And Production ◽  
Gasification Products ◽  
Ongoing Concern

An overview will be presented of the Queensland petroleum and environmental legislation relating to the exploration for and production of coal seam gas with three key focusses: a discussion of the statutory classification of coal seam gas as petroleum and the relevant statutory regulatory regime, which applies particularly with respect to competing or coincident minerals such as coal and coal gasification products; a description of the principal features and requirements for both exploration and production tenures, including land access and compensation obligations. Reference will be made to associated environmental authorities and licences, and particular environmental issues such as the containment and disposal of water will be brought to the surface as a part of production operations; and, how the legislation has sought to deal with the coordination of exploration and production operations between coal seam gas, conventional coal mining and the more recent technology of underground coal gasification with respect to the same areas. The paper will conclude with a discussion of areas of ongoing concern and difficulty including the ability to transport associated water through pipeline systems, land access and gas storage in natural underground reservoirs.

Coal Seam Gasification in Faulting Zones (Heat and Mass Balance Study)

2018 ◽  
Vol 277 ◽  
pp. 66-79 ◽  
Author(s):  
Vasyl Lozynskyi ◽  
Roman Dichkovskiy ◽  
Pavlo Saik ◽  
Volodymyr Falshtynskyi
Keyword(s):  
Mass Balance ◽  
Heat Balance ◽  
Coal Gasification ◽  
Tectonic Activity ◽  
Underground Coal Gasification ◽  
Balance Study ◽  
Gasification Process ◽  
Gasification Products ◽  
Mass Balance Study ◽  
Coal Reserves

In this article, the mass and heat balance calculations of underground coal gasification process for thin coal seams in faulting zones of Lvivskyi coal basin (Ukraine) are defined. The purpose of the research is to establish regularities of heat and mass balance changes in faulting zones influence due to usage air and oxygen-enriched blast. A comprehensive methodology that included analytical calculations is implemented in the work. The output parameters of coal gasification products for the Lvivvyhillia coal mines are detailed. The heat balance is performed on the basis of the mass balance of underground coal gasification analytical results and is described in detail. Interpretations based on the conducted research and investigation are also presented. Conclusions regarding the implementation of the offered method are made on the basis of undertaken investigations. According to conducted research the technology of underground coal gasification can be carry out in the faulting zone of stable geodynamic and tectonic activity. The obtained results with sufficient accuracy in practical application will allow consume coal reserves in the faulting zones using environmentally friendly conversion technology to obtain power and chemical generator gas, chemicals and heat.

scholarly journals Challenges and Opportunities for End-of-Life Coal Mine Sites: Black-to-Green Energy Approach

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1385
Author(s):  
Aleksander Frejowski ◽  
Jan Bondaruk ◽  
Adam Duda
Keyword(s):  
Structural Analysis ◽  
Coalbed Methane ◽  
Coal Gasification ◽  
New Technologies ◽  
Coal Mines ◽  
Green Energy ◽  
Mining Institute ◽  
Hard Coal ◽  
Underground Coal Gasification ◽  
Temporal Horizon

This paper presents the possibilities of adapting active mines to generate green energy after their closure using their resources and/or infrastructure. For this purpose, firstly, the temporal horizon of selected mines in Poland was determined, its basic assumption being the analysis of the current state. In the research, 18 mining plants operating within 12 mines in the Upper Silesian Coal Basin (USCB) were analyzed. The analyzed mines belong to three of the five largest hard coal producers in Poland, and the main object of exploitation is hard coal of energy types. Severe restrictions or even abandonment of further investments in the development of the coal mining industry were taken into consideration (regarding the construction of new shafts or the development of new exploitation levels). When determining the temporal horizon, the challenges that hamper the exploitation based at the levels of natural hazards and depth of exploitation in each mine were considered. Secondly, the criteria for the adaptation of active mines to generate energy are presented. The possibility of using the resources and infrastructural potential of active mines to produce geothermal energy from water, extracting coalbed methane (CBM), and processes of underground coal gasification (UCG) are analyzed. Finally, for a selected example—generating energy from underground coal gasification in Polish mine conditions—a structural analysis of the criteria was performed using the MICMAC method, as the Central Mining Institute has an extensive experience in the development of underground coal gasification trials in coal mines. Based on expert analysis and using structural analysis, the criteria important for UCG were selected. As demonstrated in the article, the MICMAC method can be applied in other scenarios with different criteria to implement new technologies in coal mines.

scholarly journals Studying the features of the implementation of underground coal gasification technology in terms of Lvivvuhillia SE

2020 ◽  
Vol 168 ◽  
pp. 00036
Author(s):  
Pavlo Saik ◽  
Roman Dychkovskyi ◽  
Vasyl Lozynskyi ◽  
Volodymyr Falshtynskyi ◽  
Edgar Cabana ◽  
...  
Keyword(s):  
Coal Gasification ◽  
Coal Extraction ◽  
Underground Coal Gasification ◽  
Gas Generator ◽  
Mining Operations ◽  
Extraction Technology ◽  
Gas Combustion ◽  
Current State ◽  
Coal Reserves ◽  
Gasification Technology

Topical issues of the possibilities for changes in the coal extraction technology in terms of Stepova mine of Lvivvuhillia SE have been highlighted. Analysis of the current state of mining operations has been carried out. Design solutions as for introduction of the coal gasification technology in the life cycle of the mining enterprise has been proposed on the basis of the analytical, experimental, and industrial studies; the technology has been described. Percentage ratio of the output of combustion generator gases (Н2, СО, СН4) has been identified; gas combustion value and efficiency of the process depending on certain changes in the blowing mixture composition supplied into the underground gas generator have been determined. Heat balance of the process of underground coal gasification has been studied making it possible to evaluate its energy balance. The algorithm to determine coal reserves in a mine pillar to be gasified has been proposed. Indices of the output of combustion generator gases from the gasification column have been defined. The relevant issues have been studied of ensuring the possibility of underground coal gasification technology when uncovering the mining extracted area for the underground gas generator operation.

scholarly journals Analyzing the parameters influencing the efficiency of undereground coal gasification

2018 ◽  
Vol 27 (2) ◽  
pp. 332-336 ◽  
Author(s):  
I. Sadovenko ◽  
O. Inkin ◽  
N. Dereviahina ◽  
Y. Hriplivec
Keyword(s):  
Coal Gasification ◽  
Static Pressure ◽  
Environmental Safety ◽  
Theory And Practice ◽  
Heat Output ◽  
Underground Coal Gasification ◽  
Gas Generator ◽  
Gasification Process ◽  
Negative Effect ◽  
Gas Loss

Relying upon the theory and practice of Podzemgaz stations operation, the paper has analyzed the basic factors working on the efficiency of underground coal gasification;  moreover, it has estimated their function in the formation of gas loss from un- derground gas generator. The determined factors have been divided into initial factors and controllable ones according to their process characteristics and degree of their influ- ence of gasification process itself.The data confirm the dependence of the increased pressure upon the increased heat output. Moreo- ver, high static pressure within gas generator prevents from rock roof caving and reaction channel filling up with molten rock. It has been substantiated that almost all disturbing factors have negative effect on gas calorifity whereas parameters of blast rate increase and static pressure growth in a gas generator have the most positive effect among the controlling factors. Aspects concerning the increase in loss of the produced gas that may reduce economic efficiency and environmental safety of underground coal gasification have been considered as well.

Mathematical and Geomechanical Model in Physical and Chemical Processes of Underground Coal Gasification

2018 ◽  
Vol 277 ◽  
pp. 1-16 ◽  
Author(s):  
Gennadiy Pivnyak ◽  
Roman Dychkovskyi ◽  
Oleksandr Bobyliov ◽  
Edgar Cáceres Cabana ◽  
Adam Smoliński
Keyword(s):  
Coal Gasification ◽  
The Body ◽  
Ministry Of Education ◽  
Underground Coal Gasification ◽  
Gas Generator ◽  
Geomechanical Model ◽  
Waste Products ◽  
Gasification Process ◽  
Geological Conditions ◽  
Scientific Principles

The formation of the stress-strain state of rocks in the several phase gasification processes was considered. Proceeding from the well-known principles of thermodynamics and phase formation of the multi-type rockmass under the influence of the temperature field, a geomechanical model of a two-layer artificially-formed shell formed during the gasification process by the method of variation feeding of the blowing mixture to the body of the gas generator was developed. The Neumann principle is used for the magnitude determination of the maximum stress vector, which involves the definition of the axial tensor of mechanical deformations through the anisotropy of the thermal expansion (the polar tensor of the second rank). This makes the possibility to create the base for a package of information programs creation. Such programs give the possibility to simplify the study of the rockmass deformation characteristics and to evaluate the stresses in a thermally changing environment. Researches are carried out by creating the final element system with the adaptation to the specific mining-geological conditions. These approaches are checked both for working out the coal reserves and for utilization of the mining waste products. Results of this investigation were included to the Roman Dychkovskyi thesis of the scientific degree of the Doctor of the Technique Sciences “Scientific Principles of Technologies Combination for Coal Mining in Weakly Metamorphoses Rockmass”. They contain the researches, which were conducted within the project GP – 489, financed by Ministry of Education and Science of Ukraine.

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