The feasibility of in situ geological sequestration of supercritical carbon dioxide coupled to underground coal gasification

Schiffrin, David J.

doi:10.1039/c5ee01094b

Cited by 6 publications

(2 citation statements)

References 54 publications

(117 reference statements)

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“…Current research of CBM and UCG technologies is also aimed at consumption of CO2. In the case of UCG technology, no emission gas is consumed, but the idea of bringing UCG and CBM technologies together is interesting, as well as the possibility of CO2 storage in the incurred cavity after coal gasification [10,11,12]. UCG technology is used at the present in the People's Republic of China (the 1980s to present) and Australia (1990s to present).…”

Section: Fig 1 Scheme Of Ucg Technology For Power Generationmentioning

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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Section: Fig 1 Scheme Of Ucg Technology For Power Generationmentioning

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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“…All the technologies for capturing of methane are appreciated these days, as methane is emission gas that has up to 20 times greater effect in the atmosphere than CO 2 . In the case of UCG technology, no emission gas is consumed, but the idea of bringing UCG is interesting, as well as the possibility of CO 2 storage in the incurred cavity after coal gasification [10,11].…”

Section: Introductionmentioning

confidence: 99%

The Usage of UCG Technology as Alternative to Reach Low-Carbon Energy

et al. 2021

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Countries of the European Union have stated transition to carbon-neutral economy until the year of 2050. Countries with a higher share of coal-fired power generation currently have no solution to end their combustion and use clean, emission-free energy immediately. The solution to this problem in the energy industry appears to be the increased use of natural gas, which significantly reduces CO2 emissions. In this article, we investigated the possibility of using coal in situ, using UCG (underground coal gasification) technology. We focused on verified geological, hydrogeological, and tectonic information about the selected brown coal deposit in Slovakia. This information has been assessed in research projects in recent years at the Technical University. From the abovementioned information, possible adverse factors were evaluated. These factors affect the rock environment around the underground generator by UCG activity. As part of the process management, measures were proposed to eliminate the occurrence of pollution and adverse effects on the environment. In the final phase of the UCG technology, we proposed to carry out, in the boreholes and in the generator cavity, water flushing and subsequent grouting. The proposed are suitable materials for solidification and stabilization. Results of this article´s solutions are crucial in the case of usage of this so-called clean technology, not only in Slovakia but also worldwide.

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