A thermodynamic analysis of operating conditions under which coal-water fuel is gasified in flow

Svishchev, Denis; Keiko, A. V.

doi:10.1134/s0040601510060066

Cited by 12 publications

(3 citation statements)

References 2 publications

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“…Thermodynamic modeling was carried out to study the boundaries of the thermochemical efficiency of the carbon dioxide conversion of solid fuels. Svishchev and Keiko [31] applied a similar model to assess the effect of excess water vapor on the process efficiency of coal gasification.…”

Section: Thermochemical Equilibrium Model and Initial Datamentioning

confidence: 99%

Influence of the Composition of Solid Fuel on the Equilibrium Characteristics of a Gasification Process in the Mixtures of Oxygen and Carbon Dioxide

Donskoi

2021

Solid Fuel Chem.

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The gasification of solid fuels of different elemental compositions in O2/N2 and O2/CO2 mixtures was studied using equilibrium thermodynamic modeling. The dependences of process characteristics (temperature and the yield of carbon residue) on the composition of gasification agent and the stoichiometric ratio were calculated. The addition of carbon dioxide, on the one hand, promoted the conversion of carbon due to an increase in the concentration of gasifying agents and, on the other hand, decreased the process temperature due to an increase in heat capacity and an endothermic effect of the gasification reaction. The efficiency of using O2/CO2 mixtures for the gasification of fuels increased with the carbon content. The highest chemical efficiency of coke and coal gasification was achieved at an initial CO2 concentration of about 40–60 vol %.

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Section: Thermochemical Equilibrium Model and Initial Datamentioning

confidence: 99%

Influence of the Composition of Solid Fuel on the Equilibrium Characteristics of a Gasification Process in the Mixtures of Oxygen and Carbon Dioxide

Donskoi

2021

Solid Fuel Chem.

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“…To study the limits of the thermochemical efficiency of solid fuel conversion in carbon dioxide, thermodynamic modeling was carried out. A similar model was applied in [11] to assess the effect of excess water vapor on the efficiency of the coal gasification process. The problem of calculating the chemical state of the gas-fuel system is written as follows [12]:…”

Section: Thermodynamic Modelmentioning

confidence: 99%

Thermodynamic modeling of solid fuel gasification in mixtures of oxygen and carbon dioxide

Donskoy¹

2021

J. Phys.: Conf. Ser.

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One of the main problems in the use of solid fuels is inevitable formation of significant amounts of carbon dioxide. The prospects for reducing CO2 emissions (carbon capture and storage, CCS) are opening up with the use of new coal technologies, such as thermal power plants with integrated gasification (IGCC) and transition to oxygen-enriched combustion (oxyfuel). In order to study the efficiency of solid fuel conversion processes using carbon dioxide, thermodynamic modeling was carried out. Results show that difference between efficiency of fuel conversion in O2/N2 and O2/CO2 mixtures increases with an increase in the volatile content and a decrease in the carbon content. The effect of using CO2 as a gasification agent depends on the oxygen concentration: at low oxygen concentrations, the process temperature turns out to be low due to dilution; at high oxygen concentrations, the CO2 concentration is not high enough for efficient carbon conversion.

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“…At the end of XX century the basic data about combustion of the WCF were obtained and at the same time the effective technologies of preparation and usage of water-coal slurries were created [17][18][19][20][21][22][23][24][25][26]. However, taking in account the real needs in usage of WCF, some countries with deficit of natural resources support research and development activities for improvement of water-coal technologies [2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

The Review of Ignition and Combustion Processes for Water-Coal Fuels

Iegorov

Стрижак

Chernetskiy

2016

EPJ Web of Conferences

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Abstract. In this work we have reviewed the most of known investigations of the initialization of combustion processes of water-coal fuels. The main problems of such study were emphasized. The definitive effects and factors (like mixing ratio, milling quality, the temperature of the oxidant, properties of the components and methods of the slurry preparation etc.) which have strong influence on inertia and stability of the ignition were analyzed.

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A thermodynamic analysis of operating conditions under which coal-water fuel is gasified in flow

Cited by 12 publications

References 2 publications

Influence of the Composition of Solid Fuel on the Equilibrium Characteristics of a Gasification Process in the Mixtures of Oxygen and Carbon Dioxide

Influence of the Composition of Solid Fuel on the Equilibrium Characteristics of a Gasification Process in the Mixtures of Oxygen and Carbon Dioxide

Thermodynamic modeling of solid fuel gasification in mixtures of oxygen and carbon dioxide

The Review of Ignition and Combustion Processes for Water-Coal Fuels

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