scholarly journals Determination of Kinetic Parameters of Coal Pyrolysis to Simulate the Process of Underground Coal Gasification (UCG)

2014 ◽  
Vol 13 (1) ◽  
pp. 3-9 ◽  
Author(s):  
Beata Urych
Keyword(s):  
Kinetic Parameters ◽  
Coal Gasification ◽  
Coal Pyrolysis ◽  
Underground Coal Gasification

scholarly journals Determination of the Technological Parameters of Borehole Underground Coal Gasification for Thin Coal Seams

2013 ◽  
Vol 12 (3) ◽  
pp. 8-16 ◽  
Author(s):  
Volodymyr S. Falshtynskyi ◽  
Roman O. Dychkovskyi ◽  
Vasyl G. Lozynskyi ◽  
Pavlo B. Saik
Keyword(s):  
Coal Gasification ◽  
Underground Coal Gasification ◽  
Technological Parameters ◽  
Coal Seams

scholarly journals Determination of Ammonium Concentration in Post-Process Waters from Underground Coal Gasification

2016 ◽  
Vol 21 (1-2) ◽  
pp. 107-116
Author(s):  
Malwina Cykowska ◽  
Małgorzata Bebek ◽  
Aleksandra Strugała-Wilczek
Keyword(s):  
Flow Injection ◽  
Flow Injection Analysis ◽  
Coal Gasification ◽  
Ammonium Concentration ◽  
Hard Coal ◽  
Underground Coal Gasification ◽  
Permeable Membrane ◽  
Indicator Solution ◽  
Validation Parameters

AbstractA flow injection analysis method for spectrophotometric determination of ammonium in waters produced during underground coal gasification (UCG) of lignite and hard coal was described. The analysis of UCG water samples is very difficult because of their very complicated matrix and colour. Due to a huge content of organic and inorganic substances and intensive colour of samples (sometimes yellow, quite often dark brown or even black), most analytical methods are not suitable for practical application. Flow injection analysis (FIA) is based on diffusion of ammonia through a hydrophobic gas permeable membrane from an alkaline solution stream into an acid-base indicator solution stream. Diffused ammonia causes a colour change of indicator solution, and ammonia is subsequently quantified spectrophotometrically at 590 nm wavelength. The reliability of the results provided by applied method was evaluated by checking validation parameters like accuracy and precision. Accuracy was evaluated by recovery studies using multiple standard addition method. Precision as repeatability was expressed as a coefficient of variation (CV).

scholarly journals Determination of the Technological Parameters of Borehole Underground Coal Gasification for Thin Coal Seams

2021 ◽  
Vol 12 (3) ◽  
Author(s):  
Volodymyr S. Falshtynskyi ◽  
Roman O. Dychkovskyi ◽  
Vasyl G. Lozynskyi ◽  
Pavlo B. Saik
Keyword(s):  
Coal Gasification ◽  
Underground Coal Gasification ◽  
Technological Parameters ◽  
Coal Seams

scholarly journals Preliminary modeling for module estimation on the underground coal gasification project

2021 ◽  
Vol 882 (1) ◽  
pp. 012041
Author(s):  
Zulfahmi ◽  
M Huda ◽  
B Sirait ◽  
A Maulana ◽  
A Lubis
Keyword(s):  
Feasibility Study ◽  
Coal Gasification ◽  
Soil Surface ◽  
Reduction Factor ◽  
Underground Coal Gasification ◽  
The Finite Element Method ◽  
Strength Reduction Factor ◽  
Maximum Deformation ◽  
2D And 3D

Abstract Designing the module is one of the initial works of the underground coal gasification (UCG) feasibility study, consisting of the coal area to be gasified as panels and the coal to be left as pillars. Three models have been designed with each panel dimension 380 m in length, 150 m in width and 18 m thick. The finite element method is used in the study and the 2D and 3D geotechnical simulations have been carried out with variations of the pillars. As a result of 2D modeling, the critical strength reduction factor (SRF) is 0.25 with the highest deformation on the surface is 0.04 m (SMA-C) and 0.03 (SM-D) if the pillar is 50 m width. If SRF is increased to 0.37, the deformation on the surface is 0.36 (SMA-C) and is 13.5 (SM-D), respectively. From the 3D modeling results, if it is assumed that the velocity of the UCG reactor hole rate is 0.24 m/day until it reaches the final target length of the reactor hole 380 m, the maximum deformation of the soil surface at the SMA-C and SM-D locations is 0.074 m and 0.096 m, respectively. Determination of the module is important in the feasibility study and evaluation of the UCG site.

Study on the physical properties of coal pyrolysis in underground coal gasification channel

2020 ◽  
Vol 376 ◽  
pp. 573-592
Author(s):  
Min Xu ◽  
Lin Xin ◽  
Weitao Liu ◽  
Xiangming Hu ◽  
Weimin Cheng ◽  
...  
Keyword(s):  
Physical Properties ◽  
Coal Gasification ◽  
Coal Pyrolysis ◽  
Underground Coal Gasification ◽  
Gasification Channel

Determination of random pore model parameters for underground coal gasification simulation

Energy ◽  
2019 ◽  
Vol 166 ◽  
pp. 972-978 ◽  
Author(s):  
Sebastian Iwaszenko ◽  
Natalia Howaniec ◽  
Adam Smoliński
Keyword(s):  
Coal Gasification ◽  
Model Parameters ◽  
Underground Coal Gasification ◽  
Pore Model ◽  
Random Pore Model
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