Determination of the kinetic constants of the process of plasma gasification of coal-water fuel

Leonid Kholiavchenko,Serhii Davydov,Yevhen Pihida,Serhii Demchenko,A Bulat,Y Kryzhanivskyi,O Voloshyn,V Heyets,B Liu

doi:10.1051/e3sconf/201910900034

Abstract

The chemical kinetics of processes of thermal transformations of carbon-containing media was studied at high-temperature processing (2000 K ≤ T ≤ 5000 K) in the chamber of a plasma-jet reactor using water vapor as an oxidizer. The chemical reactions rate was calculated according to the method of determining the kinetic constants of the process of gasification of coal-water fuel. The influence of the temperature of the gaseous environment in the chamber on the time of complete carbon conversion of the fuel particles is established. An example of calculating the parameters of the gasification process of coke residue particles with a size of (5 - 20)·10-5 m with an oxidizer excess coefficient α = 0.45 and fuel consumption mf = 100 kg/hr is given. The expediency of the process of vapor-plasma gasification at the temperature of gases in the reactor chamber up to 3000 K is shown.

Highlights

The significant attention has recently paid to the issue of processing solid fuel in order to obtain energy gaseous fuel, synthesis gas, which is necessary for the chemical and metallurgical industries in the production of synthetic liquid fuels and reducing media
Some processes were studied at a gas temperature in the reaction chamber up to 2000 K, and their results are presented in work [4]
Chemical kinetics takes into account the time factor, that is, the rates of chemical reactions depending on temperature, pressure, mixture composition, state of aggregation, external energy sources and the presence of catalysts are considered

Summary

Formulation of the problem

The significant attention has recently paid to the issue of processing solid fuel in order to obtain energy gaseous fuel, synthesis gas, which is necessary for the chemical and metallurgical industries in the production of synthetic liquid fuels and reducing media. These processes include: spraying fuel; evaporation of water drops; heating of steam and coal particles before the output and ignition of volatile substances; the burning of volatile substances around the particle, contributing to the rapid increase of the particle temperature; gasification of coke residue, consisting of carbon and ash. These processes have different speed, duration and degree of influence on the gasification process depending on the specific conditions

Analysis of the recent research

Presentation of the main material

Results and discussion