Pilot-scale underground coal gasification (UCG) experiment in an operating Mine “Wieczorek” in Poland

Mocek, Piotr; Pieszczek, M.; Świądrowski, J.; Kapusta, Krzysztof; Wiatowski, Marian; Stańczyk, Krzysztof

doi:10.1016/j.energy.2016.05.087

Cited by 50 publications

(26 citation statements)

References 16 publications

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“…The average calorific value obtained during this experiment (153.9 kJ/mol) is higher than the average heating value of the syngas obtained by the fixed injection point method. De and Prabu and Mocek et al reported the heating value of syngas with 123.8 and 75.5 kJ/mol, respectively, using the conventional method.…”

Section: Resultsmentioning

confidence: 99%

“…Deep coal seams, found below 300 m, can be utilized for syngas production via underground coal gasification (UCG) technology. The development in UCG technology was hindered due to the World Wars . Early work in UCG was first started in 1930 in the USSR.…”

Section: Introductionmentioning

confidence: 99%

“…The development in UCG technology was hindered due to the World Wars. 1 Early work in UCG was first started in 1930 in the USSR. On the basis of the field experience, several UCG plants were started.…”

Section: Introductionmentioning

confidence: 99%

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Movable injection point–based syngas production in the context of underground coal gasification

Kashyap

Vairakannu

2020

Int J Energy Res

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Summary Underground coal gasification (UCG) has been proven as a viable technology for the generation of high calorific value syngas using deep mine coal seams. The use of multiple injection points/movable injection point method could be an alternate technique for efficient gasification of high ash Indian coals. In this context, the present study is focused on evaluating the heating value of syngas using a variety of gasifying agents such as pure O2, air, humidified O2, and CO2‐O2 dual‐stage gasification under movable injection method for high ash coals. It is found that the use of movable injection point method had significantly increased the heating value of the product gas, compared with the fixed point injection method. For high and low ash coal under pure O2 gasification, the calorific value of syngas obtained using movable injection point is 123.2 and 153.9 kJ/mol, which are 33.5% and 24.3% higher than the syngas calorific value obtained using fixed injection point, respectively. Further, the air as a gasification agent for high ash coals had increased the gross calorific value of the syngas by 24%, using this technology. The results of high ash coal gasification using humidified oxygen at optimum conditions (0.027‐kg moisture/kg dry O2) and CO2‐O2 gas had enhanced the syngas calorific value by 12.6% and 5%, respectively. Humidified O2 and CO2‐O2 gasifying agents produced a high‐quality syngas with the calorific value of 190 kJ/mol, among the gasifying agents used. The experimental results had shown that the movable injection point method is found to be a better alternative for the generation of calorific value‐enriched syngas using high ash‐based Indian coals.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Movable injection point–based syngas production in the context of underground coal gasification

Kashyap

Vairakannu

2020

Int J Energy Res

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“…One experiment was performed in laboratory conditions, two experiments were performed at the Barbara mine and one experiment at Wieczorek Colliery. In the Barbara experimental mine two experiments were performed with different average concentrations of the components of syngas (in Table 8 they are marked as Barbara 1 and Barbara 2) [80][81][82]. Simulations on the simulation model for mixing of gases were performed for data from all four experiments.…”

Section: Analysis Of a Dangerous Explosion And A Poisoning By Syngasmentioning

confidence: 99%

Some Influences of Underground Coal Gasification on the Environment

2018

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Increasing energy costs and energy demand have renewed global interest in clean coal technologies. Underground Coal Gasification (UCG) is an industrial process that converts coal into product gas. UCG is a promising technology with a lot of health, safety and environmental advantages over conventional mining techniques. UCG carries risks to human health, agriculture and the environment. This article briefly analyzes the advantages and negative environmental impacts of UCG. It describes experimental objects, mathematical models as tools for simulation cases and it used coal from UCG experiments in Cigel, Barbara and Wieczorek mines to analyze the environmental impacts of UCG. The gasification converts the carbon in the coal to syngas and heat. We carried out a numerical simulation of the two-dimensional unstable heat conduction in the coal and overburden, with the aim of judging the influence of this heat source on the surroundings, including the surface. The results show that the temperature in the surrounding rock first increases and then decreases with time, the peak of the temperature curve decreases gradually, and its position moves inside the surrounding rock from the ignition point. A small amount of potentially dangerous syngas leaks from the UCG cavity and channels into vulnerable areas depending on working pressures. The danger of explosion and poisoning in vulnerable zones was evaluated by the simulation model. The results show that the danger is real but by monitoring and controlling the air in the vulnerable area it is possible to reduce this risk.

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“…In the bearings, chemical reactions similar to those in conventional gasifying generators run. The extracted gas has a diverse quality which is dependent on the quality of coal, the type of oxidant and coping with the process [3,4].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Risk Factors for Underground Coal Gasification

Škvareková

Tomašková

Wittenberger

et al. 2019

Management Systems in Production Engineering

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The purpose of this article is to determine the environmental impacts of underground gasification on the population and to analyze the risk of underground coal gasification (UCG) activities using selected risk assessment methods. Coal gas is a regular part of coal deposits and its extraction also allows the use of coal deposits that cannot be extracted by traditional methods. These technologies bring both positive and negative aspects. The paper points out the risk analysis, hazard identification and assessment during the operation of UCG technology using a risk graph and a risk matrix. Identified risks to workers that cannot be reduced should be taken into consideration and appropriate safeguard should be used. For each risk, it is necessary to inform employees about regular education and training. From worldwide experience with this technology, it is possible to analyze risks in Slovakia. Actual gasification produces polluting gases such as carbon dioxide, carbon monoxide, hydrogen sulphide, hydrogen sulphide, nitrogen oxides, tar and ash, and creates a risk that may occur on and under the surface of the site depending on the geological and hydrogeological structure of the deposits. Possible measures to mitigate the adverse effects are proposed for the implementation of this technology. Coal is still one of the main domestic primary energy sources. Currently, only 5 out of 19 deposits in the Slovak Republic are used. Underground gasification could increase the use of Slovak coal and brown coal deposits.

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Pilot-scale underground coal gasification (UCG) experiment in an operating Mine “Wieczorek” in Poland

Cited by 50 publications

References 16 publications

Movable injection point–based syngas production in the context of underground coal gasification

Movable injection point–based syngas production in the context of underground coal gasification

Some Influences of Underground Coal Gasification on the Environment

Analysis of Risk Factors for Underground Coal Gasification

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