Prediction and parametric analysis of cavity growth for the underground coal gasification project Thar

Underground coal gasification (UCG) is a promising clean coal technology to convert unmineable and deep coal reserves into syngas, which can be used in many industrial applications. In UCG field, real time monitoring of hydrological and geological conditions such as water influx rate, cavity growth...

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Bibliographic Details
Published in:Energy (Oxford) 2019-04, Vol.172, p.1277-1290
Main Authors: Javed, Syed Bilal, Uppal, Ali Arshad, Bhatti, Aamer Iqbal, Samar, Raza
Format: Article
Language:English
Subjects:
Calorific value
Cavity growth
Clean technology
Coal
Coal gasification
Computer simulation
Data acquisition
Energy conversion systems
Environmental monitoring
Hydrology
Industrial applications
Lignite
Mathematical models
Overburden
Packed beds
Parameters
Parametric analysis
Parametric statistics
Real time
Synthesis gas
Three dimensional models
Underground coal gasification (UCG)
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Summary:Underground coal gasification (UCG) is a promising clean coal technology to convert unmineable and deep coal reserves into syngas, which can be used in many industrial applications. In UCG field, real time monitoring of hydrological and geological conditions such as water influx rate, cavity growth and its interaction with overburden is a formidable task. UCG project Thar (UPT) lacks real time data acquisition system to monitor these parameters. In this work, a 3D axisymmetric cavity simulation model (CAVSIM) is parameterized with operating conditions of UPT and properties of Lignite B coal of Thar coal fields. For model validation, a comparison has been made between simulated and the UPT field data for the composition and heating value of syngas. The results of CAVSIM are also compared with our previous ID packed bed model, which show the superiority of CAVSIM model. Moreover, a comprehensive simulation study has been carried out to predict the cavity growth and its interaction with overburden. The effect of operating parameters of UPT on volumetric cavity growth and heating value of syngas are also investigated. •Parameterization and comparison has been made between UPT field and simulated data.•Prediction of cavity growth for UPT and its impact on other process parameters.•Effect of operating parameters of UPT on cavity growth and heating value of syngas.
ISSN:0360-5442
1873-6785
DOI:10.1016/j.energy.2019.02.005