Temat: gasification - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Equilibrium model of steam gasification of coal
Model równowagowy procesu zgazowania węgla parą wodą
Autorzy:: Cempa-Balewicz, M.
Łączny, M. J.
Smoliński, A.
Iwaszenko, S.
Powiązania:: https://bibliotekanauki.pl/articles/1342721.pdf
Data publikacji:: 2013
Wydawca:: Główny Instytut Górnictwa
Tematy:: equilibrium model
gasification
coal
model równowagowy
zgazowanie
węgiel
Opis:: Coal gasification is a complex process of parallel-consecutive chemical reactions at high temperature between the organic part of coal matter and the gasifying agent. The following two approaches are applied in modelling the coal gasification process: equilibrium and kinetic. The methods of determining the thermodynamic equilibrium can be divided into two groups: stoichiometric and nonstoichiometric methods. This article presents the equilibrium model of the steam gasification of coal developed for a laboratory experiment (Smoliński 2008, 2011). The scope of this paper includes the development of the concept concerning the division of the reaction system into two zones, where the result of one of the stages constitutes the input data for the subsequent stage. The composition of the gas mixture has been evaluated on the basis of the fundamental physical and chemical rights. The estimated content of the gases in the mixture correlate with the results of the experiment.
Zgazowanie węgla to złożony proces następczo-równoległych reakcji chemicznych zachodzących w podwyższonej temperaturze między częścią organiczną substancji węglowej a czynnikiem zgazowującym. W modelowaniu procesu zgazowania węgla stosowane są dwa podejścia: równowagowe i kinetyczne. Metody wyznaczania równowagi termodynamicznej można podzielić na dwie grupy: metody stechiometryczne oraz metody niestechiometryczne. W artykule zaprezentowano model równowagowy procesu zgazowania węgla parą wodną opracowany dla eksperymentu przeprowadzonego w skali laboratoryjnej (Smoliński 2008, 2011). W pracy rozwinięto koncepcję podziału układu reakcyjnego na dwie strefy, w których wynik jednego z etapów stanowi dane wejściowe do kolejnego. W oparciu o podstawowe prawa fizykochemiczne oszacowano skład mieszaniny gazów. Obliczona zawartość gazów w mieszaninie pozostaje w dobrej korelacji z wynikami eksperymentu.
Źródło:: Journal of Sustainable Mining; 2013, 12, 2; 21-28
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Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Determination of the technological parameters of borehole underground coal gasification for thin coal seams
Autorzy:: Falshtynskyi, V.S.
Dychkovskyi, R.O.
Lozynskyi, V.G.
Saik, P.B.
Powiązania:: https://bibliotekanauki.pl/articles/92067.pdf
Data publikacji:: 2013
Wydawca:: Główny Instytut Górnictwa
Tematy:: borehole mining
coal gasification
in situ gasification
rock mass
combustion
chemical balance
górnictwo otworowe
zgazowanie węgla
gazyfikacja in situ
górotwór
spalanie
równowaga chemiczna
Opis:: In this article the characteristics of the criteria of borehole underground coal gasification for thin coal seams are defined. The thermal and material balance calculations for coal seam gasification processes are also explained. The construction, method of in situ gasifier preparation, and the sequence of coal seam gasification for area No 1 (located in the field of Solenovsk coal deposits) are also described. The parameters of borehole underground coal gasification for the Solenovsk coal mine on the model of rock and coal massif are detailed too. The method of in situ gasifier preparation, and the sequence of coal seam gasification during a standard installation are also described in detail. Interpretations based on the conducted research and investigation are also presented.
Źródło:: Journal of Sustainable Mining; 2013, 12, 3; 8-16
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Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Reactivity of chars gasified in a fixed bed reactor with the potential utilization of excess process heat
Autorzy:: Cempa, M.
Smoliński, A.
Powiązania:: https://bibliotekanauki.pl/articles/92069.pdf
Data publikacji:: 2017
Wydawca:: Główny Instytut Górnictwa
Tematy:: coal gasification
reactivity
TGA
PCA analysis
zgazowanie węgla
reaktywność
analiza PCA
Opis:: The aim of the work presented in this paper was to determine the reactivity of chars and their selection for further research purposes concerning coal gasification processes with the utilization of process excess heat. Char reactivity can be defined as the ability of coal to react with such reactants as steam, oxygen or carbon dioxide. Reactivity determines reaction rates and therefore it is a decisive factor relating to the efficiency of combustion and gasification processes. In light of the above, reactivity may be regarded as an important parameter to be considered in the design and operation of the industrial systems of coal processing. The experimental work was conducted by means of a thermogravimetric analyzer (TGA) at temperature ranges of 700, 800 and 900 °C, with oxygen as a gasifying agent. The parameters of maximum reactivity R_max as well as of 50% of the conversion reactivity R₅₀ were calculated. The times t_max and t₅₀ necessary for attaining the maximum reactivity R_max and 50% conversion reactivity R₅₀ were also determined. The correlation between the experimentally determined values of R_max, R₅₀, t_max and t₅₀,additionally the physico-chemical parameters of the coals were examined by means of PCA analysis.
Źródło:: Journal of Sustainable Mining; 2017, 16, 4; 156-161
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Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Using Mathematica software for coal gasification simulations – Selected kinetic model application
Autorzy:: Iwaszenko, S.
Powiązania:: https://bibliotekanauki.pl/articles/970683.pdf
Data publikacji:: 2015
Wydawca:: Główny Instytut Górnictwa
Tematy:: zgazowanie węgla
model kinetyczny
symulacja
Mathematica
coal gasification
kinetic model
simulations
Opis:: Coal gasification is recognized as a one of promising Clean Coal Technologies. As the process itself is complicated and technologically demanding, it is subject of many research. In the paper a problem of using volumetric, non-reactive core and Johnson model for coal gasification and underground coal gasification is considered. The usage of Mathematica software for models' equations solving and analysis is presented. Coal parameters were estimated for five Polish mines: Piast, Ziemowit, Janina, Szczygłowice and Bobrek. For each coal the models' parameters were determined. The determination of parameters was based on reactivity assessment for 50% char conversion. The calculations show relatively small differences between conversion predicted by volumetric and non reactive core model. More significant differences were observed for Johnson model, but they do not exceeded 10% for final char conversion. The conceptual model for underground coal gasification was presented.
Źródło:: Journal of Sustainable Mining; 2015, 14, 1; 21-29
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Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Exergy analysis of the coal gasification process in ex-situ conditions
Autorzy:: Janoszek, T.
Powiązania:: https://bibliotekanauki.pl/articles/91916.pdf
Data publikacji:: 2013
Wydawca:: Główny Instytut Górnictwa
Tematy:: coal gasification
exergy analysis
fossil fuel
zgazowanie węgla
analiza egzergii
paliwo konwekcyjne
Opis:: In this article the possibilities of implementing exergy analysis of coal gasification processes in ex-situ conditions was presented. The analysis was performed in order to detect the sources of exergy loss. The experimental results of the coal gasification process are also presented and was used as input data to perform the exergy analysis of the coal gasification process.
Źródło:: Journal of Sustainable Mining; 2013, 12, 3; 32-37
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Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Critical analysis of underground coal gasification models. Part II: Kinetic and computational fluid dynamics models. Literary studies and comparison of models
Autorzy:: Żogała, A.
Powiązania:: https://bibliotekanauki.pl/articles/91950.pdf
Data publikacji:: 2014
Wydawca:: Główny Instytut Górnictwa
Tematy:: coal gasification
kinetic models
CFD models
zgazowanie węgla
model kinetyczny
model CFD
Opis:: Purpose Underground coal gasification, as a complex and technically difficult process, in many aspects requires the support provided by computer simulations. There are a lot of mathematical models of UCG, some of them are concentrated with the forecast of syngas composition. The most important may be divided into three groups: equilibrium, kinetic and CFD models. The purpose of this work was the detailed critical analysis of more advanced approaches (than equilibrium considerations) applied in simulations of the coal conversion process – both kinetic and based on computational fluid dynamics. The other aim of this paper was the comparative analysis of the most important models of underground coal gasification. Methods Literary studies, concerned with the features and mathematical description of kinetic and CFD models of coal gasification, were used as the research method applied in the work presented. Compilation of the kinetic parameters of gasification reactions was an important part of this article. For that purpose the analysis of Polish and foreign papers, monographs and university handbooks was undertaken. Results Critical analysis of kinetic and CFD models of coal gasification (together with their mathematical formulation) was the result of considerations presented in this article. Kinetic equations were shown separately for pyrolysis, homogenous and heterogeneous reactions. In the case of CDF models, except for the presentation of the conservation equation, the most important methods of modeling turbulence are described (for the reason that this phenomenon may have significant inflence on the final results). Practical implications The work presented describes practical issues connected with kinetic and CFD models, focusing on their capabilities, drawbacks and possible application problems. Originality/ value This paper presents state of art in the field of coal gasification modeling using kinetic and computational fluid dynamics approach. The paper also presents own comparative analysis (concerned with mathematical formulation, input data and parameters, basic assumptions, obtained results etc.) of the most important models of underground coal gasification.
Źródło:: Journal of Sustainable Mining; 2014, 13, 1; 29-37
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Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Equilibrium simulations of coal gasification – factors affecting syngas composition
Autorzy:: Żogała, A.
Powiązania:: https://bibliotekanauki.pl/articles/92028.pdf
Data publikacji:: 2014
Wydawca:: Główny Instytut Górnictwa
Tematy:: coal gasification
equilibrium
syngas
heating value
zgazowanie węgla
równowaga
gaz syntezowy
wartość opałowa
Opis:: Purpose: Coal gasification is complex technology, which results depend on many variables, connected among others with fuel, the converting agent and the process itself. The paper aims to analyze, by means of simulations, the influence of the following factors – temperature, pressure, characteristic parameters of coal and gasifying agent, on the composition and heating value of the obtained syngas. The other aim of this paper is the determination of gasification efficiency (based on the definition of cold gas efficiency) for various process conditions. Methods: Computer simulations were used as the research method for the work presented. An equilibrium model, based on the stoi-chiometric method with four independent reactions, was formulated and used in this paper. This model was implemented in Mathematica software. The influence of temperature (in a range from 500 to 1500°C), pressure (changed from atmospheric to 35 atm), three types of gasifying agent (mixtures of air, pure oxygen and steam) and the composition of four Polish coals (lignite and three hard-coals) on syngas parameters were analyzed in this paper. Results: Concentrations of CO2, CO, CH4, H2O, H2, N2 in the equilibrium syngas, for the chosen temperature, pressure and parame-ters of the fuel and converting agent were the results of the simulations carried out. Subsequently, the lower heating value and process efficiency for each syngas composition was calculated. Practical implications: The simulations indicated the thermodynamic limits of gasification and allowed for the formulation of the general principles ruling this process. Results presented in this paper may be useful in the preliminary optimization and analysis of coal gasification. They also can be a point of reference for more advanced simulations. Originality/ value: This paper presents own results obtained from equilibrium simulations of coal gasification. The author implemented a mathematical model, based on the method of Deringer and Traustel, presented earlier in literature, to carry out the calculations.
Źródło:: Journal of Sustainable Mining; 2014, 13, 2; 30-38
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Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Critical analysis of underground coal gasification models. Part I: Equlibrium models – literary studies
Autorzy:: Żogała, A.
Powiązania:: https://bibliotekanauki.pl/articles/92025.pdf
Data publikacji:: 2014
Wydawca:: Główny Instytut Górnictwa
Tematy:: coal gasification
equilibrium
stoichiometric model
non-stoichiometric model
zgazowanie węgla
równowaga
model stechiometryczny
model niestechiometryczny
Opis:: Purpose Underground coal gasification is a very difficult process due to changes in the parameters over time and within the space of the reactor and a variety of phenomena that occurs there. Consequently, it is necessary to create appropriate mathemati-cal models, which simplify the optimization and forecast of future results (especially final gas properties). The purpose of this work was the detailed critical analysis of the simplest coal gasification simulations methods, based on thermodynamic calculations of the process. These models, called equilibrium models, can be divided into two groups: stoichiometric and non-stoichiometric. The other aim of this paper was to characterize various engineering methods used in the calculation of equilibrium gasification processes. Methods Literary studies, concerned with general aspects of underground coal gasification modeling and the modeling of coal gasi-fication in the manner of equilibrium calculations, were used as a research method applied in presented work. Results The critical analysis of equilibrium models of coal gasification and the characterization (including mathematical formulation of process, range of required parameters, rate of convergence of calculations and methodology of searching solutions) of stoichiometric and non-stoichiometric methods were results of numerous considerations presented in this article. Practical implications The work presented describes practical issues connected with equilibrium models – their advantages, limitations and possible problems (for example with the determination of required constants) and potential applications (preliminary analysis, point of reference to more complex simulations etc.). Originality/ value This paper presents state of the art in field of equilibrium coal gasification modeling. This article is also attempt to elaborate on the most important problems connected with thermodynamic models of coal gasification.
Źródło:: Journal of Sustainable Mining; 2014, 13, 1; 22-28
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Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Selected environmental aspects of gasification and co-gasification of various types of waste
Autorzy:: Kamińska-Pietrzak, N.
Smoliński, A.
Powiązania:: https://bibliotekanauki.pl/articles/92142.pdf
Data publikacji:: 2013
Wydawca:: Główny Instytut Górnictwa
Tematy:: gasification
co-gasification
plastics
sewage sludge
biomass wastes
petroleum based residues
refuse derived fuel
dioxins
heavy metals
tar
zgazowanie
współzgazowanie
tworzywa sztuczne
odpady biomasowe
odpady ropopochodne
paliwo z odpadów
dioksyny
metale ciężkie
smoła koksownicza
Opis:: The process of gasification of carbonaceous fuels is a technology with a long-standing practice. In recent years, the technology has been extensively developing to produce energy or chemicals on the basis of obtained gas. Studies focused on the improvement of the gasification process aims at developing the process by increasing environmental safety, the efficiency and the possibilities to utilize various types of alternative fuels (post-consumer waste, various types of biomass waste, by-products and post-process residues, sewage sludge) independently or by co-gasification with coal. The choice of the gas purification system, the process operating parameters and introducing the necessary modifications to the existing technologies are essential steps while processing these kinds of feedstock, with regard to their individual characteristics. This paper discusses selected environmental aspects of the gasification and co-gasification of municipal solid waste, sewage sludge, various types of biomass waste and post-process residues. Selected alternative fuels are also characterized, focusing on the influence of their presence in the feedstock in terms of production and the emission of polychlorinated organic compounds, tars, heavy metals and toxic elements.
Źródło:: Journal of Sustainable Mining; 2013, 12, 4; 6-13
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Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Thermochemical utilization of low rank coal and flotation concentrate
Autorzy:: Gąsior, Rafał
Smoliński, Adam
Powiązania:: https://bibliotekanauki.pl/articles/91985.pdf
Data publikacji:: 2019
Wydawca:: Główny Instytut Górnictwa
Tematy:: hydrogen
gasification
reactivity
low rank coal
flotation concentrate
wodór
gazyfikacja
reaktywność
węgiel o niskiej wartości
flotokoncentrat
Opis:: Flotation concentrates are waste material from coal mine operation. The process of steam gasification seems to be an attractive option for their economic utilization and an alternative to their potential combustion in boilers. The gasification process is characterized by both higher efficiency and lower emission of pollution than conventional combustion systems. In this paper the results of the steam gasification of low rank coal and flotation concentrate into hydrogen-rich gas at the temperature of 800 °C are presented. The reactivity for 50% carbon conversion as well as the maximum reactivity in this process were calculated for the samples studied.
Źródło:: Journal of Sustainable Mining; 2019, 18, 2; 109-111
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Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: CFD simulation of temperature variation in carboniferous rock strata during UCG
Autorzy:: Janoszek, T.
Sygała, A.
Bukowska, M.
Powiązania:: https://bibliotekanauki.pl/articles/92018.pdf
Data publikacji:: 2013
Wydawca:: Główny Instytut Górnictwa
Tematy:: underground coal gasification
computational fluid dynamics (CFD)
CFD
modelling
podziemne zgazowanie węgla
numeryczna mechanika płynów
modelowanie
Opis:: The numerical simulation was based on the computational fluid dynamics formalism in order to identify the change of temperature in rock strata during underground coal gasification (UCG). The calculations simulated the coal gasification process using oxygen and water vapour as a gasification agent in 120 hours. Based on the selected software (Ansys-Fluent) a model of underground coal gasification (UCG) process was developed. The flow of the gasification agent, the description of the turbulence model, the heat-exchange model and the method of simulation of chemical reactions of gasification are presented herein.
Źródło:: Journal of Sustainable Mining; 2013, 12, 4; 34-44
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Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Determination of kinetic parameters of coal pyrolysis to simulate the process of underground coal gasification (UCG)
Autorzy:: Urych, B.
Powiązania:: https://bibliotekanauki.pl/articles/92059.pdf
Data publikacji:: 2014
Wydawca:: Główny Instytut Górnictwa
Tematy:: underground coal gasification
pyrolysis
thermogravimetric analysis
kinetic parameters
podziemne zgazowanie węgla
piroliza
analiza termograwimetryczna
parametry kinetyczne
Opis:: Purpose The aim of the research presented in this paper was to determine the values of the kinetic parameters of coal pyrolysis from two areas of the planned experiment, UCG, i.e. the Barbara Experimental Mine of the Central Mining Institute and the Wieczorek Mine. Methods The thermal decomposition of coal analysis used the thermogravimetric technique. The test was carried out in a temperature range of 298-1173 K in a nitrogen atmosphere for three fixed heating rates, β – 5, 10, and 15 K/min. A selection of sample heating rates of coal and reaction environments were designed to reflect the conditions seen during the process of underground coal gasification. The kinetic parameters were determined by using modified Coats-Redfern, Kissinger and Mianowski-Radko methods. Results The values of the activation energy, E, and the pre-exponential factor, A, were determined for a given model of the first order decomposition reaction of coal. The study successfully compared kinetic parameters of the tested coals. Practical implications Designated kinetic parameters may be used to model the process of pyrolysis and – as preliminary data – for installation design of pilot underground coal gasification. Originality/ value The devolatilization of a homogenous lump of coal is a complex issue. Currently, the CFD technique (Computational Fluid Dynamics) is commonly used for the multi-dimensional and multiphase phenomena modelling. The mathematical models, describing the kinetics of the decomposition of coal, proposed in the article can, therefore, be an integral part of models based on numerical fluid mechanics.
Źródło:: Journal of Sustainable Mining; 2014, 13, 1; 3-9
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Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: CFD simulations of influence of steam in gasification agent on parameters of UCG process
Autorzy:: Żogała, A.
Janoszek, T.
Powiązania:: https://bibliotekanauki.pl/articles/92198.pdf
Data publikacji:: 2015
Wydawca:: Główny Instytut Górnictwa
Tematy:: obliczeniowa mechanika płynów
czynnik zgazuwujący
skład syngazu
temperatura
computational fluid dynamics (CFD)
gasification agent
syngas composition
temperature
Opis:: Underground coal gasification (UCG) is considered to be a perspective and constantly developing technology. Nevertheless it is a very complex and technically difficult process, which results depend on many variables. Mathematical models enable detailed analysis of UCG process - for example - give possibility of prediction of syngas composition depending on applied gasification medium. In practice, mixtures of oxygen, air and steam are the most frequently used as converting agents. Steam is injected to the reactor in order to obtain combustible components. Nevertheless higher concentrations of steam create a problem of reduction of temperature in reactor. This issue of amount of steam in reacting system was analyzed in given paper. Computer simulations were used as test method applied in presented work. Calculations were carried by using Computational Fluid Dynamics (CDF) method and Ansys Fluent software. Changes in outlet concentrations of syngas components (CO, CO2, CH4, H2O, H2), in relation with time of process, were presented. Composition of product gas, its heating value and temperature of process were also examined (on outlet of rector) in function of content of steam in gasification agent (which was mixture of O2 and H2O). Obtained results indicated a possibility of conduct of stable gasification process (with predictable characteristic of gas). The simulation also demonstrated a possibility of deterioration of conditions in real reactors as a results of applying of too high amounts of steam.
Źródło:: Journal of Sustainable Mining; 2015, 14, 1; 2-11
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Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Deformation properties of sedimentary rocks in the process of underground coal gasification
Autorzy:: Bukowska, M.
Sygała, A.
Powiązania:: https://bibliotekanauki.pl/articles/92007.pdf
Data publikacji:: 2015
Wydawca:: Główny Instytut Górnictwa
Tematy:: high temperature
underground coal gasification
residual strain
Poisson's ratio
wysoka temperatura
podziemna gazyfikacja węgla
odkształcenie trwałe
współczynnik Poissona
Opis:: The article presents results of research into changes in deformation properties of rocks, under influence of temperature, during the process of underground coal gasification. Samples of carboniferous sedimentary rocks (claystones and sandstones), collected in different areas of Upper Silesian Coal Basin (GZW), were heated at the temperature of between 100 and 1000-1200°C, and then subjected to uniaxial compression tests to obtain a full stress-strain curves of the samples and determine values of residual strain and Poisson's ratio. To compare the obtained values of deformation parameters of rocks, tested in dry-air state and after heating in a given range of temperature, normalised values of residual strain and Poisson's ratio were determined. Based on them, coefficient of influence of temperature on tested deformation parameters was determined. The obtained values of the coefficient can be applied in mining practice to forecast deformability of gangue during underground coal gasification, when in the direct surrounding of a georeactor there are claystones or sandstones. The obtained results were analysed based on classification of uniaxial compression strength of GZW gangue, which formed the basis for dividing claystones and sandstones into very low, low, medium and high uniaxial compression strength rocks. Based on the conducted tests it was concluded that the influence of uniaxial compression strength on the value of residual strain, unlike the influence of grain size of sandstones, is unambiguous within the range of changes in the parameter. Among claystones changes in the value of Poisson's ratio depending on their initial strength were observed. Sandstones of different grain size either increased or decreased the value of Poisson's ratio in comparison with the value determined at room temperature in dry-air conditions.
Źródło:: Journal of Sustainable Mining; 2015, 14, 3; 144-156
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Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Material and Energy Flow Analysis (MEFA) of the unconventional method of electricity production based on underground coal gasification
Autorzy:: Czaplicka-Kolarz, K.
Korol, J.
Ludwik-Pardała, M.
Ponikiewska, K.
Powiązania:: https://bibliotekanauki.pl/articles/970691.pdf
Data publikacji:: 2014
Wydawca:: Główny Instytut Górnictwa
Tematy:: material flow analysis
underground coal gasification
electricity production
Umberto NXT LCA
analiza przepływu materiałów
podziemna gazyfikacja węgla
produkcja energii elektrycznej
Opis:: Purpose In this paper, the application of Umberto NXT LCA software to devise a Material and Energy Flow Analyses (MEFA) for the technology of producing electricity from gas extracted in the process of shaftless underground coal gasification is presented. The Material Flow Analyses of underground coal gasification includes a range of technology, through obtaining process gas and its purification, to electricity production, and, additionally, the capture of carbon dioxide. Methods To evaluate electricity production based on Underground Coal Gasification, Material and Energy Flow Analyses (MEFA) was used. Modeling material and energy flow helps a high level of efficiency or technology of a given process to be reached, through the effective use of resources and energy, or waste management. The applied software for modeling material flow enables, not only, the simulation of industrial processes, but also the simulation of any process with a material or energy flow, e.g. in agriculture. Results MEFA enabled the visualization of material and energy flow between individual unit processes of the technology of electricity production from UCG gas. An analysis of material and energy flow networks presented in the form of Sankey diagrams enabled the identification of unit processes with the biggest consumption of raw materials and energy, and the greatest amount of emissions to the environment. Practical implications Thanks to applying material and energy flow networks with Umberto software, it is possible to visualize the flow of materials and energy in an analyzed system (process/technology). The visualization can be presented in the form of an inventory list of input and output data, or in the form of a Sankey diagram. In the article, a Sankey diagram has been utilized. MEFA is first stage of the plan to conduct analyses using Umberto software. The analyses performed so far will be used in the following stages of the research to assess the environmental impact using the LCA (Life Cycle Assessment) technique, to analyze costs using the LCC (Life Cycle Cost) technique, and to analyze eco-efficiency. It is important to highlight the fact that this is the first attempt of material and energy flow analysis of electricity production from UCG gas. Originality/ value This is the first approach which contains a whole chain of electricity production from Underground Coal Gasification, including stages of gas cleaning, electricity production and the additional capture of carbon dioxide.
Źródło:: Journal of Sustainable Mining; 2014, 13, 3; 41-47
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

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