Low-calorific gasification of underground coal with a higher humidity

Kostúr, Karol; Laciak, Marek; Durdán, Milan; Kačur, Ján; Flegner, Patrik

doi:10.1016/j.measurement.2014.12.016

Cited by 16 publications

(17 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is slightly higher than the heating value of syngas, which was obtained during the single point injection method. Laciak et al 11 and Kostur et al 19 reported 73 and 63.9 kJ/mol of the heating value of syngas during air gasification, respectively. Hence, the movable injection point for air gasification gains a marginal increase in the chemical energy of syngas.…”

Section: High Ash Coal Gasification Using Air (Exp#3)mentioning

confidence: 98%

“…Wiatowski et al implemented in situ gasification experiments with Polish hard coal using oxygen, water, and air as the gasifying mediums and reported a syngas with 84.9 kJ/mol. Kostur et al performed gasification experiments using air with high moisture content (approximately 40%) coals and obtained an average gas calorific value of 64 kJ/mol. Kumari and Prabu performed gasification under two‐stage mode using CO 2 ‐O 2 with a feed flow ratio of 0.2 and obtained a syngas with 182 kJ/mol.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Kashyap

Vairakannu

2020

Int J Energy Res

View full text Add to dashboard Cite

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.

show abstract

Section: High Ash Coal Gasification Using Air (Exp#3)mentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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

Kashyap

Vairakannu

2020

Int J Energy Res

View full text Add to dashboard Cite

show abstract

“…(2) hard to control. It is difficult to perceive and monitor the combustion state of the gasification face because gasification is carried out in a closed underground and the underground conditions are complex and changeable as well as high temperature and humidity [44]. The UCG process is complex and dynamic [45].…”

Section: The Development Of Ucg Projects Worldwidementioning

confidence: 99%

“…However, its sensor nodes are not suitable for working in typical high temperature and humidity UCG environments. Kostúr et al [44] proposed a new method for the low-calorific coal with a higher humidity to improve the UCG technology from the point of syngas quality. However, these methods are costly or temporarily impossible to scale.…”

Section: Research Status Of Ucg Monitoringmentioning

confidence: 99%

Monitoring and Control in Underground Coal Gasification: Current Research Status and Future Perspective

Xiao

Yin

et al. 2019

Sustainability

View full text Add to dashboard Cite

By igniting in the coal seam and injecting gas agent, underground coal gasification (UCG) causes coal to undergo thermochemical reactions in situ and, thus, to be gasified into syngas for power generation, hydrogen production, and storage. Compared with traditional mining technology, UCG has the potential sustainable advantages in energy, environment, and the economy. The paper reviewed the development of UCG projects around the world and points out that UCG faces difficulties in the field of monitoring and control in UCG. It is expounded for the current research status of monitoring and control in UCG, and clarified that monitoring and control in UCG is not perfect, remaining in the stage of exploration. To improve the problem of low coal gasification rate and gas production, and then to make full use of the potential sustainable advantages, the paper offers a perception platform of a UCG monitoring system based on the Internet-of-Things (IoT) and an optimal control model for UCG based on deep learning, and has an outlook on breakthrough directions of the key technologies related to the package structure design for moisture-proof and thermal insulation, antenna design, the strategy for energy management optimization, feature extraction and classification design for the network model, network structure design, network learning augmentation, and the control of the network model, respectively.

show abstract

“…The UCG technologies are the subject of many publications. The technical solutions applied depend on geological conditions of coal basins, type of coal beds, physical and chemical properties of coal and other factors as well (Bhutto et al 2013;Kostur et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Sensing underground coal gasification by ground penetrating radar

Kotyrba

Stańczyk

2017

Acta Geophys.

View full text Add to dashboard Cite

The paper describes the results of research on the applicability of the ground penetrating radar (GPR) method for remote sensing and monitoring of the underground coal gasification (UCG) processes. The gasification of coal in a bed entails various technological problems and poses risks to the environment. Therefore, in parallel with research on coal gasification technologies, it is necessary to develop techniques for remote sensing of the process environment. One such technique may be the radar method, which allows imaging of regions of mass loss (voids, fissures) in coal during and after carrying out a gasification process in the bed. The paper describes two research experiments. The first one was carried out on a large-scale model constructed on the surface. It simulated a coal seam in natural geological conditions. A second experiment was performed in a shallow coal deposit maintained in a disused mine and kept accessible for research purposes. Tests performed in the laboratory and in situ conditions showed that the method provides valuable data for assessing and monitoring gasification surfaces in the UCG processes. The advantage of the GPR method is its high resolution and the possibility of determining the spatial shape of various zones and forms created in the coal by the gasification process.

show abstract

Low-calorific gasification of underground coal with a higher humidity

Cited by 16 publications

References 9 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

Monitoring and Control in Underground Coal Gasification: Current Research Status and Future Perspective

Sensing underground coal gasification by ground penetrating radar

Contact Info

Product

Resources

About