scholarly journals Graphical Analysis of Gasification Processes

2021 ◽  
Author(s):  
Shehzaad Kauchali
Keyword(s):  
Coal Gasification ◽  
Graphical Representation ◽  
Graphical Analysis ◽  
Underground Coal Gasification ◽  
Reactor Kinetics ◽  
Coal Technology ◽  
Indispensable Tool ◽  
Flowsheet Development ◽  
Energy Balances ◽  
Excellent Tool

Gasification processes incorporate many reactions that are fairly complex to analyse making their design difficult. In this chapter it is shown that general gasification systems are limited by consideration of mass and energy balances only. Here, a ternary Carbon-Hydrogen-Oxygen diagram is developed to represent gasification processes. The diagram incorporates basic chemistry and thermodynamics to define a region in which gasification occurs. The techniques are further validated from data obtained from pilot or laboratory experiments available in literature. In this chapter we develop graphical representation for sawdust gasification and underground coal gasification (UCG), a clean coal technology. The methods described allow for further analysis without considerations to thermodynamic equilibrium, reactor kinetics, reactor design and operation. This analysis is thus an indispensable tool for flowsheet development using gasification and an excellent tool for practitioners to rapidly understand gasification processes.

scholarly journals Underground Coal Gasification: A Regulatory Framework for Alberta

2014 ◽  
Vol 51 (3) ◽  
pp. 525
Author(s):  
Astrid Kalkbrenner
Keyword(s):  
Coal Gasification ◽  
Regulatory Framework ◽  
Approval Process ◽  
Underground Coal Gasification ◽  
Coal Seams ◽  
Clean Coal ◽  
Coal Deposits ◽  
The World ◽  
Recent Developments ◽  
Coal Technology

Underground Coal Gasification (UCG) is a new emerging clean coal technology. It holds promise for reaching and making use of very deep coal seams that technically could not otherwise have been mined at these depths. UCG technology and knowledge developed significantly during the 20th century. Countries around the world with large coal deposits sustain and promote UCG research and launch projects with the intention to commercially deploy UCG. Alberta currently hosts two UCG projects, and a third project is under consideration. The development of these projects suggested the need for a UCG specific regulatory approval process. In 2011, Alberta enacted specific UCG legislation. This article deals with recent developments in UCG technology and its regulations. The aim of this article is to present Alberta’s current UCG regulatory framework as a model for other jurisdictions.

ACTIVATION OF UNDERGROUND COAL GASIFICATION WITH THE CONSIDERATION OF THE MODE OF THE UNDERGROUND GAS GENERATOR

2020 ◽  
Author(s):  
V Falshtynskyi ◽  
M Lozynska ◽  
D Lozynska
Keyword(s):  
Coal Gasification ◽  
Underground Coal Gasification ◽  
Gas Generator

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
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