Unconventional Resources: The Next Generation. Assessing Coal to Liquids, Oil Shale, Underground Coal Gasification, Microbial Coal Conversion and Other Technologies within the SPE-PRMS.

2015 ◽  
Author(s):  
Douglas Peacock ◽  
Azlan Majid ◽  
Gaffney Gaffney
Keyword(s):  
Oil Shale ◽  
Coal Gasification ◽  
Next Generation ◽  
Underground Coal Gasification ◽  
Coal Conversion ◽  
Unconventional Resources

Model Test Study of Underground Co-Gasification of Coal and Oil Shale

2013 ◽  
Vol 295-298 ◽  
pp. 3129-3136 ◽  
Author(s):  
Li Mei Zhao ◽  
Jie Liang ◽  
Lu Xin Qian
Keyword(s):  
Temperature Field ◽  
Model Test ◽  
Oil Shale ◽  
Coal Gasification ◽  
Underground Coal Gasification ◽  
Test Study ◽  
Heat Value ◽  
Occurrence State ◽  
Specification Analysis

For testing the feasibility of in-situ exploring oil shale by underground coal gasification. Based on the specification analysis of coal and oil shale, through simulating the occurrence state and characteristics of coal and oil shale, the underground Co-gasification model test was carried-out. In different gasification conditions (φ(O2) are 30%、35%、40%、45%、50% and oxygen/steam) ,The temperature-field extend rules of coal and oil shale、the separate-out rules of oil shale production and influence of oil shale on the quality of gas were studied. The results show that: when φ(O2) is 40-45%, temperature-rising rate is 7°C/min、extend rate of gasification face is 0.036m/h, the extend of temperature field is continuous and stable, the temperature change of oil shale and coal are synchronously , the high temperature of oil shale can up to 1000 °C above, that can satisfied the requirement of oil-gas collecting; and the same time , The heat-value of syngas improved 26.37%; The technological parameter was obtained in this test.

The Effectiveness of Reactive Materials for Contaminant Removal in the Process of Coal Conversion

2020 ◽  
Vol 26 (4) ◽  
pp. 493-505
Author(s):  
Jacek Grabowski ◽  
Aleksandra Tokarz
Keyword(s):  
Organic Contaminants ◽  
Coal Gasification ◽  
Permeable Reactive Barriers ◽  
Underground Coal Gasification ◽  
Post Processing ◽  
Limit Values ◽  
Reactive Material ◽  
Coal Conversion ◽  
Reactive Materials ◽  
Processing Water

ABSTRACT The technology of permeable reactive barriers (PRB) is one of the most frequently developed methods for protecting soil and water from pollution. These barriers are zones filled with reactive material in which contaminants are immobilized and/or their concentration is reduced to the limit values during the flow of contaminated groundwater. This article presents a study on the efficiency of the removal of contaminants from the post-processing water from the underground coal gasification (UCG) process. The tests were carried out in a laboratory using a flow-through reactor design. The post-processing water came from a UCG experiment carried out in the Barbara mine, Mikołów, Poland. Activated coal, zeolite, and nano-iron were used as the reactive materials in the experiment. The obtained results were compared to tests carried out with reference water (artificial) with strictly defined characteristics. Research has shown that activated carbon is the most effective material used in the reaction zone for removing organic contaminants from groundwater generated during the coal conversion process. A new feature is the use of PRB in a georeactor zone during the UCG process to limit the potential risk of contamination spreading in the case of uncontrolled and unpredictable operation, in emergency situations related to gas leaks into the environment, during underground fires, and for water polluted by high-toxicity substances.

Prediction of feasible synthesis gas compositions at three European coal deposits

2021 ◽  
Author(s):  
Christopher Otto ◽  
Thomas Kempka
Keyword(s):  
Synthesis Gas ◽  
Coal Gasification ◽  
Economic Feasibility ◽  
Gas Composition ◽  
Underground Coal Gasification ◽  
Computationally Efficient ◽  
Coal Conversion ◽  
Coal Deposits ◽  
In Situ Conditions

<p>In the present study, we apply our validated stoichiometric equilibrium model [1], based on direct minimisation of Gibbs free energy, to predict the synthesis gas compositions produced by in-situ coal conversion at three European coal deposits. The applied modelling approach is computationally efficient and allows to predict synthesis gas compositions and calorific values under various operating and geological boundary conditions, including varying oxidant and coal compositions. Three European coal deposits are assessed, comprising the South Wales Coalfield (United Kingdom), the Upper Silesian Coal Basin (Poland) and the Ruhr District (Germany). The stoichiometric equilibrium models were first validated on the basis of laboratory experiments undertaken at two different operating pressures by [2] and available literature data [3]. Then, the models were adapted to site-specific hydrostatic pressure conditions to enable an extrapolation of the synthesis gas composition to in-situ pressure conditions. Our simulation results demonstrate that changes in the synthesis gas composition follow the expected trends for preferential production of specific gas components at increased pressures, known from the literature, emphasising that a reliable methodology for estimations of synthesis gas compositions for different in-situ conditions has been established. The presented predictive approach can be integrated with techno-economic models [4] to assess the technical and economic feasibility of in-situ coal conversion at selected study areas as well as of biomass and waste to synthesis gas conversion projects.</p><p><span>[</span><span>1] </span><span>Otto, C.; Kempka, T. Synthesis Gas Composition Prediction for Underground Coal Gasification Using a Thermochemical Equilibrium Modeling Approach. </span><em><span>Energies</span></em> <span><strong>2020</strong></span><span>, </span><em><span>13</span></em><span>, 1171.</span></p><p>[2] Kapusta et al., 2020</p><p>[3] Kempka et al., 2011</p><p>[4] Nakaten and Kempka, 2019</p>

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.

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