Computational Modeling of Underground Coal Gasification

✍ Scribed by Vivek V. Ranade (Author); Sanjay M Mahajani (Author); Ganesh Arunkumar Samdani (Author)

• Publisher: CRC Press
• Year: 2019
• Leaves: 357
• Edition: 1
• Category: Library

✦ Synopsis

The book deals with development of comprehensive computational models for simulating underground coal gasification (UCG). It starts with an introduction to the UCG process and process modelling inputs in the form of reaction kinetics, flow patterns, spalling rate, and transport coefficient that are elaborated with methods to generate the same are described with illustrations. All the known process models are reviewed, and relative merits and limitations of the modeling approaches are highlighted and compared. The book describes all the necessary steps required to determine the techno-economic feasibility of UCG process for a given coal reserve, through modeling and simulation.

✦ Table of Contents

Chapter 1: Introduction

1.1. World energy scenario

1.2. Cleaner energy from coal

1.3. Underground coal gasification

1.4. Computational modelling of UCG

1.5. Organization of this book

Chapter 2: Underground Coal Gasification: State of the Art

2.1 Underground coal gasification

2.2 UCG technologies

2.3 UCG field trials

2.4 Mitigating environmental risks

2.5 Importance of coal properties in UCG process

Part I: Pre-requisites of Computational Modeling

Chapter 3: Physico-chemical Properties of Coal

3.1 Types of coal

3.2 Chemical properties of coal

3.3 Physical and mechanical properties

3.4 Summary

Chapter 4: Kinetics of Coal Gasification

4.1 Drying and pyrolysis

4.2 Chemical reactions

4.3 Kinetic studies – Experimental methods

4.4 Kinetic models for coal gasification

4.5 Catalytic effect of ash and char on different reactions

4.6 Summary

Chapter 5: Laboratory Studies on Underground Coal Gasification

5.1. Overview of laboratory-scale UCG experiments

5.2 Typical laboratory setup and procedure

5.3 Combustion cavity experiments

5.4 Gasification cavity experiments

5.5 Experiments to measure spalling rate

5.6 Determination of heat transfer coefficient in UCG cavity

5.7 Summary

Part II: Computational Modeling

Chapter 6: Approach towards computational modeling of UCG

6.1. Overall modelling approach

6.2. Role of thermodynamics and reaction kinetics

6.3. Role of flow patterns

6.4. Role of heat and mass transport

6.5. Role of spalling

6.6. Overview of available process models

6.7. Summary

Chapter 7: Thermodynamic & Reaction Engineering Models

7.1 Introduction

7.2 Thermodynamic models

7.3 Reaction engineering (CRE) models

7.4 Summary

Chapter 8: Multi-zonal and CFD Models

8.1. Introduction

8.2. Development of the compartment model

8.3. Results from compartment model

8.4. Model parametric studies

8.5. New integrated 3-D UCG simulator from LLNL

8.6. Computational fluid dynamics (CFD) based models

8.7. Well layout design for UCG

8.8. Summary and Conclusions

Part III: Summary

Chapter 9: Summary, Conclusions and Path Forward

9.1. UCG: Current status

9.2. Computational modelling for pushing frontiers & realizing potential of UCG

9.3. Path forward

✦ Subjects

Engineering & Technology;Chemical Engineering;Chemical Processing & Design;Civil, Environmental and Geotechnical Engineering;Tunnelling & Underground Engineering;Mechanical Engineering;Thermodynamics;Power & Energy;Renewable Energy;Mining, Mineral & Petroleum Engineering