Influence of soil cover on reducing the environmental impact of spontaneous coal combustion in coal waste gobs: A review and new experimental data

As the first step in coal combustion and gasification, coal devolatilization has significant effect on reaction process. Previous coal devolatilization models have some disadvantages, such as poor flexibility, model complexity, and requirement of characterization parameters. Recently, Sommariva et al. have proposed a multi-step kinetic model of coal devolatilization. This model avoids the disadvantages mentioned above and can predict elemental composition of tar and char. In this paper, the mechanism of this model has been revised for simple application to Chemkin. Revision method is that some reactions are split into more reactions by using one pseudo-intermediate-product to replace several final products. Simulation results show that calculation results from revised mechanism compare quite well with that from original mechanism and have good agreement with experimental data. The revised mechanism is accurate and can be applied to Chemkin very easily, which gives it wide application to simulation of coal pyrolysis, gasification and combustion.

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Geochemistry and environmental impact of neutral drainage from an uraniferous coal waste heap

Journal of Geochemical Exploration ◽

10.1016/j.gexplo.2018.05.001 ◽

2018 ◽

Vol 191 ◽

pp. 1-21 ◽

Cited By ~ 2

Author(s):

Bohdan Kříbek ◽

Ondra Sracek ◽

Martin Mihaljevič ◽

Ilja Knésl ◽

Vladimír Majer

Keyword(s):

Environmental Impact ◽

Coal Waste

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A model for assessing the compound risk represented by spontaneous coal combustion and methane emission in a gob

Journal of Cleaner Production ◽

10.1016/j.jclepro.2020.122925 ◽

2020 ◽

Vol 273 ◽

pp. 122925 ◽

Cited By ~ 2

Author(s):

Yu Xu ◽

Zijun Li ◽

Huasen Liu ◽

Xiaowei Zhai ◽

Rongrong Li ◽

...

Keyword(s):

Methane Emission ◽

Coal Combustion ◽

Spontaneous Coal Combustion

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Biogeocenosis development during initial revegetation of a coal combustion ash dump

BIO Web of Conferences ◽

10.1051/bioconf/20181100038 ◽

2018 ◽

Vol 11 ◽

pp. 00038 ◽

Cited By ~ 1

Author(s):

Natalia Sheremet ◽

Ivan Belanov ◽

Vladimir Doronkin ◽

Tatiana Lamanova ◽

Natalia Naumova

Keyword(s):

Moisture Content ◽

Plant Communities ◽

Coal Combustion ◽

Soil Cover ◽

Thermal Power ◽

Coal Ash ◽

Soil Formation ◽

Plant Species Composition ◽

Initial Stage ◽

Substrate Moisture

The initial stage of biogeocenoses development on the coal ash dump produced by the thermal power staton in Novosibirsk (55.000, 83.068), Russia, were studied after 9 years of spontaneous revegetation. Soil properties, soil cover and plant communities were examined in detail. The predominating types of embryozems and transition from open to succession plant communities were described. Soil substrate moisture content was found to determine changes in plant species composition, projective cover and abundance, altogether causing asynchronicity of soil formation in different sites.

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