Chemical Kinetic Modeling in Coal Gasification Processes: an Overview

Abstract

<p>Coal is the fuel most able to cover world deficiencies in oil and natural gas. This motivates the development of new and more effective technologies for coal conversion into other fuels. Such technologies are focused on coal gasification with production of syngas or gaseous hydrocarbon fuels, as well as on direct coal liquefaction with production of liquid fuels. The benefits of plasma application in these technologies is based on the high selectivity of the plasma chemical processes, the high efficiency of conversion of different types of coal including those of low quality, relative simplicity of the process control, and significant reduction in the production of ashes, sulphur, and nitrogen oxides. In the coal gasifier, two-phase turbulent flow is coupled with heating and evaporation of coal particles, devolatilization of volatile material, the char combustion (heterogeneous/porous oxidation) or gasification, the gas phase reaction/oxidation (homogeneous oxidation) of gaseous products from coal particles. The present work reviews literature data concerning reaction kinetic modelling in coal gasification. Current state of related kinetic models for heterogeneous/homogeneous oxidation of coal particles, included plasma assisted, is reviewed.</p>

Исследование Горения Водоугольных Смесей

“…После испарения летучих составляющих с поверхности угля горение представлено механизмом, указанной Славинской Н.А. [12]…”

Analyzing chemical kinetics of coal gasification in mini gasifier reactor

“…Potential end-uses include power generation, liquid fuels and chemical feedstock (Skodras et al, 2015). The kinetic rates and extents of the gasification process vary and typically serve as functions of temperature, pressure, reactor and configuration, gas composition, and the nature -chemical composition and properties -of the coal being gasified (Muller et al, 2003;Slavinskaya et al, 2009;Speight, 2013a;Speight, 2013b). Generally, the reaction rate (i.e., the rate of coal conversion) is higher at higher temperatures, whereas reaction equilibrium may be favored at either higher or lower temperatures, depending on the specific type of gasification reaction (Speight, 2015).…”