Coal bed methane and underground coal gasification
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A brief introduction to coal bed methane (CBM) and underground coal gasification. It includes yields and possible environmental impacts. A group presentation as part of my MSc at Keele University.
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Coal bed methane and underground coal gasification
- 1. Can Coal Really Be Green? ESC: 40032 Clean & Green Technology II: Power From Beneath The Earth By: Daniel Wilson Udeshika Weerakkody http://lgisolutions.com/technologies.html
- 6. Post Combustion Capture Flue gas Boiler Steam Turbine Standard emission controls (SCR, FGD, ESP) CO 2 Capture Steam Electricity & Water Coal Air Captured CO 2 Flu Gas (N 2 , O 2 , H 2 O) Flue gas
- 9. Integrated Gasification Combined Cycle (IGCC) Water gas shift reaction Gasifire CO 2 capture Gas cleaning Gas turbine Steam turbine Coal Oxygen H 2 O Slag CO-rich syngas H 2 O steam H 2 rich syngas (CO 2 and H 2 Captured CO 2 Exhaust gas Capture emissions Electricity Flue gas (N 2 , O 2 , H 2 O) H 2 rich fluegas Electricity
- 10. Enhanced Coal Bed Methane (ECBM) Coal CH 4 CO 2 injection Microbial Conversion Displace http://www.epa.gov/cmop/docs/cmm_recovery.pdf
- 11. CO2 Injection CO2 Tank & Pump Trucks CO2 Compressor Drilling New Well Coring Bit http://www.cslforum.org/publications/documents/Alberta_Research_Council_Enhanced.pdf
- 13. UCG UCG successfully being used in Australia, Uzbekistan, China and India. Potential of 17 Billion tons of coal remains in the UK (Hestor 2010). Can be successfully paired with intermittent renewables (Davison 2009). H2 can be 17% more efficient than UCG (Gnanapragasam et al 2010). Source: www.newcoalenergy.com.au
- 18. Questions ?
Editor's Notes
- Use in pulverized and fluidized technologies 1. install a membrane in the flue gas stream which diverts the CO2 flow while allowing others to flow Bind with the solvent then heated release stream of co2 recycle back some co2 escapes also call CO2 scrubbing technique. Run the capture process decrease the efficiency 9% amine solvent and chilled ammonia
- H2 rich fuel gas need not to be pure hydrogen as it goes trough a combined cycle. But this is ten to twenty times expensive than conventional. By gasification technologies N2 can be converted to fertilizer. 10% of the mercury still remains
- Since one molecule of methane is replaced by two molecules of CO2, and assuming a cost of CAN$28.50 per tonne of CO2, the CO2 for injection would account for CAN$57.00 of the gas price per tonne of methane produced. If some of the CO2 in the injection gas can be replaced by nitrogen (ie in flue gas), the economics improve
- freeze-thaw/evaporation. This technology reduces the volume of water to be disposed through injection by evaporation during summer months and by factional freezing during the winter. It has been implemented successfully as a pilot in the San Juan