Multi-Criteria Evaluation of Coal Properties in Terms of Gasification

Abstract

This paper presents a comparative analysis of two types of coal taken from the ZG Janina and ZG Wieczorek coalmines. The aim of this study has been to analyze the suitability of the coal in the context of the gasification process. The types of coal vary considerably in terms of their characteristics. Each of them was subjected to treatment in a ten-ringed annular jig. A particle size of 0-18 mm constituted the feed. The separated coal was divided into five layers, each of them containing material from two additional annular jigs. Analysis of their characteristics was carried out for each of the five layers and for both types of coal obtained, taking into account both their physicochemical properties as well as chemical ones. Each of these characteristics was then presented in three-dimensional surface diagrams, where the ordinate (or Y-axis) and abscissa (X-axis) was the particle size and height in which the material ended up in the jig (expressed as a percentage of the total height of the device). On the basis of observations, it was found that the types of coal have different potential for gasification, although both types are within the limits specified on the basis of previous studies. A correlation analysis between particle size and remaining characteristics of coal was carried out for each of the layers, allowing to determine which of the studied characteristics induced changes significant from the point of view of the coal gasification process. The entire research and observation was supported by conclusions and findings, which shall form the basis for further, in-depth analysis of coal.

Application of Multi-Parameter Data Visualization by Means of Multidimensional Scaling to Evaluate Possibility of Coal Gasification

“…Among the above 18 samples, 17 came from Janina Mining Plant and only one sample from Wieczorek Coal Mine. The whole set of data may be found in (Dzik et al, 2014;Gawenda et al, 2014a;b;Marciniak-Kowalska, 2012-13;Marciniak-Kowalska et al, 2014).…”

Hard coal preparation in a single stage crushing circuit for gasification purposes

“…The results of oxidization process are connected with the physical and chemical properties of coal feed, such as the reactivity, particle size, ash content, calorific value coking properties as well as chlorine and sulfur content [3]. The typical values of these parameters are presented in Table 1.…”