scholarly journals Study on Effects of Thermal Resistance and Thermal Buoyancy on Oxygen Flow Patterns during Underground Coal Gasification

ACS Omega ◽  
2021 ◽  
Author(s):  
Wei Guo ◽  
Huan Liu ◽  
Zhibing Chang ◽  
Di Cao ◽  
Shuqin Liu
Keyword(s):  
Thermal Resistance ◽  
Coal Gasification ◽  
Flow Patterns ◽  
Oxygen Flow ◽  
Underground Coal Gasification ◽  
Thermal Buoyancy

scholarly journals Effect of Oxygen Flow Rate on Combustion Time and Temperature of Underground Coal Gasification

2021 ◽  
Vol 1 (2) ◽  
pp. 27-33
Author(s):  
Apriansyah Zulatama ◽  
Aida Syarif ◽  
Muhammad Yerizam
Keyword(s):  
Flow Rate ◽  
Coal Combustion ◽  
Coal Gasification ◽  
Economic Value ◽  
Combustion Process ◽  
Oxygen Flow Rate ◽  
Oxygen Flow ◽  
Underground Coal Gasification ◽  
Burning Coal ◽  
Effect Of Oxygen

Underground Coal Gasification (UCG) is a process of converting coal in the ground into synthetic gas that has economic value. In the UCG process which will be carried out in the UCG prototype assisted by the presence of oxygen as a gasification agent, which this gasification agent will help the process of burning coal in the ground. The flow rate of oxygen in the process of UCG affecting the coal combustion temperature and effective flame from burning coal. The highest temperature at a flow rate of 5 l/min is 240oC, at an oxygen flow rate of 3 l/min the highest temperature is 143oC and at an oxygen flow rate of 2 l/min the highest temperature is 135oC and time effective flame at a flow rate of 5 l / min ie 80 minutes, effective burning time on the speed of the flow rate of 3 l / min ie for 120 minutes and time effective flame at a flow rate of 2 l / min ie for 165 minutes. This study proves that the greater the oxygen flow rate is used as the gasification agent at UCG process the lignite coal combustion temperatures will be high and effective flame coal combustion process will be more brief.

Cold Flow Simulation in Underground Coal Gasification (UCG) Cavities

2014 ◽  
Vol 1 (1) ◽  
pp. 15-24 ◽  
Author(s):  
Dipankar Chatterjee ◽  
◽  
Satish Gupta ◽  
Chebolu Aravind ◽  
Rakesh Roshan
Keyword(s):  
Coal Gasification ◽  
Flow Simulation ◽  
Underground Coal Gasification ◽  
Cold Flow

scholarly journals Changes in properties of tar obtained during underground coal gasification process

2021 ◽  
Author(s):  
Marian Wiatowski ◽  
Roksana Muzyka ◽  
Krzysztof Kapusta ◽  
Maciej Chrubasik
Keyword(s):  
Coal Gasification ◽  
Coal Tar ◽  
Liquid Product ◽  
Coke Oven ◽  
Underground Coal Gasification ◽  
Gasification Process ◽  
Dominant Component ◽  
Process Gas ◽  
High Volatility ◽  
Product Separator

AbstractIn this study, the composition of tars collected during a six-day underground coal gasification (UCG) test at the experimental mine ‘Barbara’ in Poland in 2013 was examined. During the test, tar samples were taken every day from the liquid product separator and analysed by the methods used for testing properties of typical coke oven (coal) tar. The obtained results were compared with each other and with the data for coal tar. As gasification progressed, a decreasing trend in the water content and an increasing trend in the ash content were observed. The tars tested were characterized by large changes in the residue after coking and content of parts insoluble in toluene and by smaller fluctuations in the content of parts insoluble in quinoline. All tested samples were characterized by very high distillation losses, while for samples starting from the third day of gasification, a clear decrease in losses was visible. A chromatographic analysis showed that there were no major differences in composition between the tested tars and that none of the tar had a dominant component such as naphthalene in coal tar. The content of polycyclic aromatic hydrocarbons (PAHs) in UCG tars is several times lower than that in coal tar. No light monoaromatic hydrocarbons (benzene, toluene, ethylbenzene and xylenes—BTEX) were found in the analysed tars, which results from the fact that these compounds, due to their high volatility, did not separate from the process gas in the liquid product separator.

Modelling of the underground coal gasification process at Thulin on the basis of thermodynamic equilibria and isotopic measurements

Fuel ◽  
1990 ◽  
Vol 69 (5) ◽  
pp. 624-632 ◽  
Author(s):  
A DUFAUX ◽  
B GAVEAU ◽  
R LETOLLE ◽  
M MOSTADE ◽  
M NOEL ◽  
...  
Keyword(s):  
Coal Gasification ◽  
Underground Coal Gasification ◽  
Gasification Process ◽  
Isotopic Measurements

Control oriented modeling and optimization of one dimensional packed bed model of underground coal gasification

2014 ◽  
Vol 24 (1) ◽  
pp. 269-277 ◽  
Author(s):  
Ali Arshad Uppal ◽  
Aamer Iqbal Bhatti ◽  
Erum Aamir ◽  
Raza Samar ◽  
Shahid Ahmed Khan
Keyword(s):  
Coal Gasification ◽  
Packed Bed ◽  
Underground Coal Gasification ◽  
One Dimensional ◽  
Modeling And Optimization
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