Environmental aspects of a field-scale underground coal gasification trial in a shallow coal seam at the Experimental Mine Barbara in Poland

Kapusta, Krzysztof; Stańczyk, Krzysztof; Wiatowski, Marian; Chećko, Jarosław

doi:10.1016/j.fuel.2013.05.015

Cited by 96 publications

(59 citation statements)

References 27 publications

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“…Since the 1930s, more than 50 pilot-scale UCG operations have been carried out worldwide, e.g., in the former Union of Soviet Socialist Republics (USSR), Europe, the U.S., South Africa, Australia and China [1][2][3][4]. These tests were predominantly undertaken at shallow depths, e.g., at Angren (110 m) in Uzbekistan, Chinchilla (140 m) in Australia, and Hanna (80 m) and Hoe Creek (30-40 m) in the U.S. One recent pilot-scale UCG operation in Poland was undertaken in 2010 at about 400 m depth in order to gasify 1300 metric tons of coal in three months at an average rate of 600 kg/h [6][7][8][9]. Supply chains for different Underground Coal Gasification (UCG) end-use options analysed within the present study (electricity generation, hydrogen production and its utilisation for methanol and ammonia synthesis), modified according to Kinaev et al [10].…”

Section: Introductionmentioning

confidence: 99%

RETRACTED: Techno-Economic Comparison of Onshore and Offshore Underground Coal Gasification End-Product Competitiveness

Nakaten

Kempka

2017

Energies

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Underground Coal Gasification (UCG) enables the utilisation of coal reserves that are currently not economically exploitable due to complex geological boundary conditions. Hereby, UCG produces a high-calorific synthesis gas that can be used for generation of electricity, fuels and chemical feedstock. The present study aims to identify economically competitive, site-specific end-use options for onshore and offshore produced UCG synthesis gas, taking into account the capture and storage (CCS) and/or utilisation (CCU) of resulting CO 2 . Modelling results show that boundary conditions that favour electricity, methanol and ammonia production expose low costs for air separation, high synthesis gas calorific values and H 2 /N 2 shares as well as low CO 2 portions of max. 10%. Hereby, a gasification agent ratio of more than 30% oxygen by volume is not favourable from economic and environmental viewpoints. Compared to the costs of an offshore platform with its technical equipment, offshore drilling costs are negligible. Thus, uncertainties related to parameters influenced by drilling costs are also negligible. In summary, techno-economic process modelling results reveal that scenarios with high CO 2 emissions are the most cost-intensive ones, offshore UCG-CCS/CCU costs are twice as high as the onshore ones, and yet all investigated scenarios except from offshore ammonia production are competitive on the European market.

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Section: Introductionmentioning

confidence: 99%

RETRACTED: Techno-Economic Comparison of Onshore and Offshore Underground Coal Gasification End-Product Competitiveness

Nakaten

Kempka

2017

Energies

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“…Максимум температур (1050 -1200 0 С) наблюдается на границе перехода окислительной зоны в восстановительную (Falshtynskyi, Dychkovskyi, Lozynskyi & Saik, 2013) Поэтому породы нижнего слоя кровли, по длине огневого канала, подвержены разным термоупругим напряжениям. Такая же ситуация наблюдается и в выгазованном пространстве (Kapusta, Stańczyk, Wiatowski & Chećko, 2013).…”

Section: определение параметров полостей расслоенияunclassified

Substantiating parameters of stratification cavities formation in the roof rocks during underground coal gasification

Falshtynskyi¹,

Lozynskyi²,

Saik³

et al. 2016

Min. miner. depos.

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Purpose. Underground coal gasification, as a complex and technically difficult process, should be supported in many aspects by computer simulations or analytical calculations of rock mass behavior. However, little is known about the formation of stratification cavities in the roof rocks during coal seam gasification. To research the formation of stratification cavities and rocks deformations by mine pressure with the methods of calculation based on hypotheses or statistical information, a number of hypotheses are used. The main purpose is to examine the rock mass behavior and formation of stratification cavities during gasification of a thick coal seam.Methods. Analytical calculations were used as the research method for the work presented. The mathematical model of the stress-strain state of rock mass based on the theory of elasticity, resiliency, and maximum equilibrium, was developed and used in this paper.Findings. Critical analysis of geomechanical models of coal gasification together with their mathematical formulation was the result of considerations presented in this paper. Equations were derived for substantiating parameters of stratification cavities above the goaf of the underground gasifier. Subsequently, the volumes of stratification cavities depending on the length of gasification channel were calculated. The results have significant influence on gasifiers development and the final efficiency of gasification process.Originality. The research results were obtained from analytical calculations of rock mass behavior during thick coal seams gasification. The authors implemented a mathematical model based on the method suggested by professor A. Savostianov which was used in carrying out the calculations. Practical implications.The present study provides a starting point for further research and analytical calculations of rock mass behavior. The data and conclusions outlined in this paper may be useful in preliminary optimization and analysis of coal seams gasification. They can also be a point of reference for more advanced geomechanical simulations.

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“…Технологія газифікації успішно вирішує технологічні та соціальні проблеми. Вона може стати екологічним санітаром навколишнього середовища від негативних наслідків впливу традиційного палив-но-енергетичного комплексу (Kapusta, Stańczyk, Wiatowski, & Chećko, 2013). На разі, технологічний процес газифікації дозволяє ліквідувати утворення кислотних дощів і знизити парниковий ефект (Dubiński & Turek, 2015;Yang, Zhang, & Liu, 2009).…”

Section: вступunclassified

Features of setting up a complex, combined and zero-waste gasifier plant

Tabachenko¹,

Saik²,

Lozynskyi³

et al. 2016

Min. miner. depos.

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Purpose. Setting up and implementation of complex, combined and non-waste power-chemical plant based on underground coal gasification with regard to analysis of its technical and economic efficiency. Methods.Research into the reliability of the gasifier plant components was performed by determining the sequence of processes and operations during underground coal gasification technology at all levels of the process.Findings. It was established that high reliability of coal gasification is ensured by stability of all constituents of the technological elements of the process. The basic steps of combining power and chemical plant specializing in synthetic hydrocarbons production are described. During gasifier plant operation, upgrading of equipment at the general level of mechanization between 0.5 -0.7 will not lead to a serious increase in productivity. Therefore, it is necessary to allocate means and efforts to completion of mechanization of all production processes.Originality. The efficiency of mechanization and automation of processes at a gasifier plant is expressed through the formula of automatic control. We have identified dependencies describing changes in the mechanization efficiency of all technological units of the gasifier plant and productivity growth due to reducing the number of manufacturing operations.Practical implications. Analytical research testifies that effective functioning of the gasifier plant is ensured by automation of all technological processes. Computer system conversion requires additional investments which exceed the costs of mechanization by 1.25 -1.4 times.

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Environmental aspects of a field-scale underground coal gasification trial in a shallow coal seam at the Experimental Mine Barbara in Poland

Cited by 96 publications

References 27 publications

RETRACTED: Techno-Economic Comparison of Onshore and Offshore Underground Coal Gasification End-Product Competitiveness

RETRACTED: Techno-Economic Comparison of Onshore and Offshore Underground Coal Gasification End-Product Competitiveness

Substantiating parameters of stratification cavities formation in the roof rocks during underground coal gasification

Features of setting up a complex, combined and zero-waste gasifier plant

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