Coal gasification process simulations using combined kinetic-thermodynamic models in one-dimensional approximation

Donskoy, Igor; Shamansky, Vitaly; Козлов, А. Г.; Svishchev, Denis

doi:10.1080/13647830.2016.1259505

Cited by 20 publications

(10 citation statements)

References 38 publications

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“…In this work, computational tool is used that allows finding values for fuel consumption in different operating modes of the gasifier (described in detail in [23,24]). By simplifying the model, such calculations can be carried out in a wide range of conditions for the relatively short computational time.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Particle velocity is considered as equal to gas velocity that is determined by continuity equation. Gas composition in every section is considered to be at chemical equilibrium under fixed fuel conversion degree [23,28]. Numerical solution of a whole equation system is obtained as follows: the kinetics of chemical transformations is calculated using a system of ordinary differential equations (2-4) to change the particle mass for a given temperature distribution; then the stationary problem of heat transfer (1) is solved taking into account heat sources.…”

Section: Mathematical Modelmentioning

confidence: 99%

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Mathematical modelling of the oxyfuel gasification of pulverized coal fuel

Donskoy

2020

E3S Web Conf.

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In this work, we studied the efficiency of the coal gasification process under oxyfuel conditions. Using mathematical modelling one-dimensional stationary statement, the optimal parameters of coal processing were determined, air and oxyfuel conditions are compared. The calculated dependences of the characteristics of the gasification process on the stoichiometric ratio at different initial temperatures are constructed. The optimal values of oxygen stoichiometric ratio and the maximum values of cold gas efficiency in the selected range of parameters are determined. The contribution of the thermophysical and reactive properties of the gasification agent to the change in the cold gas efficiency is estimated.

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Section: Mathematical Modelmentioning

confidence: 99%

Section: Mathematical Modelmentioning

confidence: 99%

Mathematical modelling of the oxyfuel gasification of pulverized coal fuel

Donskoy

2020

E3S Web Conf.

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“…Normally, these functions are determined by kinetics of chemical reactions. This research involves a simplified kineticthermodynamic approach to their calculation [39,40]. The model combines kinetic and equilibrium relations and allows using robust computational methods of thermodynamics in non-uniform systems with stationary flows of mass and energy [41][42][43].…”

Section: Mathematical Model Of Onedimensional Steady-state Reactormentioning

confidence: 99%

“…Heat and mass transfer coefficients are defined as functions of temperature, mean particle size and gas velocity related to widely known correlations for fixed beds. More detailed description of the model could be found in [40,44,45]. Whole system of nonlinear algebraic equations was iteratively solved using Newtontype numerical method.…”

Section: Mathematical Model Of Onedimensional Steady-state Reactormentioning

confidence: 99%

Numerical Study on the Efficiency of Biomass and Municipal Waste Fixed-Bed Co-Gasification

Donskoy

2019

E3S Web Conf.

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The utilization of combustible waste, such as sewage sludge, can be combined with energy production for small-scale consumers. One of the ways of such utilization can be gasification, which makes it possible to obtain a combustible gas suitable for thermal and electric energy production. The aim of this study is to estimate the efficiency of sewage sludge co-conversion with woody biomass using mathematical model that allows to investigate process characteristics under different process conditions (air stoichiometric ratio, fuel mixture composition, initial moisture of sewage sludge). Dependencies of gasification process characteristics are evaluated and compared with published experimental data. Fixed-bed downdraft process is investigated related to using of wood and sewage sludge mixtures. New results are obtained considering process efficiency dependence on input fuel composition, method is proposed to estimate acceptable fuel mixtures based on agglomeration and efficiency requirements.

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“…Heat and mass transfer in solid and gas phases moving counter-flow lead to the possibility of concentration of various substances in certain spatial zones of the reactor [11,12]. Filtration combustion refers to the propagation of chemical reaction waves through a porous medium with gas filtration [13,14]. Typically, this process is carried out in shaft-type reactors, in which solid combustible material and gaseous oxidant move counter-current towards each other [15,16].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamically Equilibrium Compositions of the Products Formed During the Filtration Combustion of the Metal-Containing Mixtures

Salgansky

Podlesniy

Цветков

et al. 2020

Eurasian Chem. Tech. J.

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Thermodynamic calculations for describing the compositions of the products formed in conditions of the filtration combustion of the metal-containing mixtures were carried out. The analysis of the equilibrium compositions of the products was carried out using the TERRA high-temperature thermochemical equilibrium calculation program. According to the results of calculations, the metals were divided into two groups. First one forms both the condensed and gaseous phases and in the second one ‒ metals that are only in the condensed phase. In case of the presence of metal compounds in the gas phase, as a rule, these are the following compounds: metals, oxides, hydroxides, hydrides, sulfides and metal sulfates. Metals of the second group cannot be subjected to mass transfer under conditions of the filtration combustion wave and will remain in solid combustion products (in ash).

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Coal gasification process simulations using combined kinetic-thermodynamic models in one-dimensional approximation

Cited by 20 publications

References 38 publications

Mathematical modelling of the oxyfuel gasification of pulverized coal fuel

Mathematical modelling of the oxyfuel gasification of pulverized coal fuel

Numerical Study on the Efficiency of Biomass and Municipal Waste Fixed-Bed Co-Gasification

Thermodynamically Equilibrium Compositions of the Products Formed During the Filtration Combustion of the Metal-Containing Mixtures

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