Underground Coal Gasification: - Office of Fossil Energy - U.S. ...

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New LLNL-DOE Draft Report Contents: • UCG history • Ignition and gasification process • Environmental management issues • Carbon management • Best practices and lessons-learned • Technology and R&D gaps; recommendations for future R&D Copies available soon. Send requests to: burton14@llnl.gov
Why Consider Underground Coal Gasification? • Eliminates conventional coal mining, reducing operating costs, surface damage, eliminating mining safety problems • Accesses otherwise un-mineable coals (deep or thin seams), increasing exploitable reserves • Needs no surface gasification facilities, reducing capital costs • Leaves gasification residuals underground • Eliminates costs, facilities, and environmental issues associated with transport/storage of mined coal or coal gasification residuals (e.g., ash) • Reduces overall greenhouse gas emissions and has advantages for geologic carbon storage
Page 1 and 2: Underground Coal Gasification: Scie
Page 3: DOE/LLNL Activity in UCG • Invent
Page 7 and 8: Limitations and Concerns for UCG
Page 9 and 10: Environmental and Site Assessment O
Page 11 and 12: Risk-based Decision-making for UCG
Page 13 and 14: Simulations of UCG Impacts on Geolo
Page 15 and 16: Science and Technology Gaps • Env
Page 17 and 18: Monitoring Tools • Geophysical to
Page 19 and 20: LLNL’s CFD Model: Approach • Cy
Page 21 and 22: Temperature Profiles from the CFD M
Page 25 and 26: CCS with UCG: Advantages • Good c
Page 27 and 28: CO 2 storage within UCG zones: Cave

Underground Coal Gasification: - Office of Fossil Energy - U.S. ...

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