scholarly journals Slag Behavior in Gasifiers. Part I: Influence of Coal Properties and Gasification Conditions

Energies ◽  
2013 ◽  
Vol 6 (2) ◽  
pp. 784-806 ◽  
Author(s):  
Ping Wang ◽  
Mehrdad Massoudi
Keyword(s):  
Coal Properties

Effect of coal properties on the specific coal consumption in a typical thermal power station in India

1994 ◽  
Vol 35 (7) ◽  
pp. 597-603
Author(s):  
Shail ◽  
M.S. Sodha ◽  
Ram Chandra ◽  
B. Pitchumani ◽  
J. Sharma
Keyword(s):  
Thermal Power Station ◽  
Thermal Power ◽  
Power Station ◽  
Coal Consumption ◽  
Coal Properties

Coal properties and their influence on air activation

Carbon ◽  
1997 ◽  
Vol 35 (12) ◽  
pp. 1765-1779 ◽  
Author(s):  
O.C. Kopp ◽  
E.L. Fuller ◽  
C.R. Sparks ◽  
M.R. Rogers ◽  
M.L. McKinney
Keyword(s):  
Coal Properties

Estimating the value of coal properties using Lotus 1-2-3

2020 ◽  
pp. 287-300
Author(s):  
Timothy Sugrue ◽  
Frederick C. Scherr
Keyword(s):  
Coal Properties

scholarly journals Characteristics of Water Contaminants from Underground Coal Gasification (UCG) Process—Effect of Coal Properties and Gasification Pressure

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6533
Author(s):  
Magdalena Pankiewicz-Sperka ◽  
Krzysztof Kapusta ◽  
Wioleta Basa ◽  
Katarzyna Stolecka
Keyword(s):  
Bituminous Coal ◽  
Coal Gasification ◽  
Strong Relationship ◽  
Underground Coal Gasification ◽  
Volatile Phenols ◽  
Water Contaminants ◽  
Physicochemical Composition ◽  
Gasification Process ◽  
Anthracite Coal ◽  
Coal Properties

One of the most important issues during UCG process is wastewater production and treatment. Condensed gasification wastewater is contaminated by many hazardous compounds. The composition of the generated UCG-derived wastewater may vary depending on the type of gasified coal and conditions of the gasification process. The main purpose of this study was a qualitative and quantitative characterization of the UCG wastewater produced during four different UCG experiments. Experiments were conducted using semi-anthracite and bituminous coal samples at two distinct pressures, i.e., 20 and 40 bar. The conducted studies revealed significant relationships between the physicochemical composition of the wastewater and the coal properties as well as the gasification pressure. The strongest impact is noticeable in the case of organic pollutants, especially phenols, BTEX and PAH’s. The most abundant group of pollutants were phenols. Conducted studies showed significantly higher concentration levels for bituminous coal: 29.25–49.5 mg/L whereas for semi-anthracite effluents these concentrations were in much lower range 2.1–29.7 mg/L. The opposite situation occurs for BTEX, higher concentrations were in wastewater from semi-anthracite gasification: 5483.1–1496.7 µg/L, while in samples from bituminous coal gasification average BTEX concentrations were: 2514.3–1354.4 µg/L. A similar relationship occurs for the PAH’s concentrations. The higher values were in case of wastewater from semi-anthracite coal experiments and were in range 362–1658 µg/L while from bituminous coal gasification PAH’s values are in lower ranges 407–1090 µg/L. The studies conducted have shown that concentrations of phenols, BTEX and PAH’s decrease with increasing pressure. Pearson’s correlation analysis was performed to enhance the interpretation of the obtained experimental data and showed a very strong relationship between three parameters: phenols, volatile phenols and CODcr.

Multi-Criteria Evaluation of Coal Properties in Terms of Gasification

2014 ◽  
Vol 59 (3) ◽  
pp. 677-690 ◽  
Author(s):  
Jolanta Marciniak-Kowalska ◽  
Tomasz Niedoba ◽  
Agnieszka Surowiak ◽  
Tadeusz Tumidajski
Keyword(s):  
Particle Size ◽  
Coal Gasification ◽  
Three Dimensional ◽  
Point Of View ◽  
Gasification Process ◽  
Multi Criteria Evaluation ◽  
Depth Analysis ◽  
Coal Properties ◽  
Induced Changes ◽  
Dimensional Surface

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.

Aspects of coal properties and constitution important for gasification

Fuel ◽  
1985 ◽  
Vol 64 (10) ◽  
pp. 1405-1414 ◽  
Author(s):  
Karl H. Van Heek ◽  
Heinz-Jürgen Mühlen
Keyword(s):  
Coal Properties

Research on Optimization Model for Power Coal Blending Based on Genetic Algorithm

2005 ◽  
Author(s):  
Yanfen Liao ◽  
Changhong Wu ◽  
Xiaoqian Ma
Keyword(s):  
Genetic Algorithm ◽  
Average Method ◽  
Power Plants ◽  
Weighted Average ◽  
Weighted Average Method ◽  
Blended Coal ◽  
Coal Blending ◽  
Two Factors ◽  
Great Pressure ◽  
Coal Properties

The slagging process is a popular problem in coal-fired power plants because the coal properties deviate from designed condition, at the same time, power plants is enduring a great pressure with the increasing of coal prices. Power coal blending provides an effective way to solve these two problems. In some traditional methods, blended-coal properties were usually treated by the weighted average method which induced the optimization solutions deviating from the actual results. The reason is that different coal property indexes are based on different benchmarks; for example, the sulphur content in coal is based on applied basis, while the slagging properties of blended-coal are calculated on air-dried basis, which was influenced by the contents of moisture and ash in each coal. In order to study the effects, based on the genetic algorithm, a model considering these two factors was build up to optimum the coal-blending scheme. Compared with the traditional weighted average method, the new model got higher slagging property indexes, as means the former method may include some coal blending schemes into the optimizing process, in which the real slagging parameters go beyond constraint standards. Therefore, in the case of coal-blending optimization to prevent slagging in furnace, these two factors are especially important and should be considered carefully to ensure the precise of slagging parameters, so as to obtain the optimum results both in the prices of coals and in slagging property.

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