1. Mississippi Power Kemper County IGCC Plant
2008 Southern Section A&WMA
Annual Meeting and Technical Conference
Scott McMillan
Southern Company Services
Keith Benvenutti
Mississippi Power Company

2. IGCC
IGCC stands for “Integrated Gasification Combined Cycle”
IGCC is a combined-cycle power plant and a coal-gasification plant designed specifically to work with each other.
There are currently only two coal based IGCC plants in the U.S.

3. IGCC
Gasification
Fuel (i.e. coal, petcoke, biomass, etc.) is introduced into a “Gasifier”
The fuel is subjected to high temperature and pressure with limited air (or oxygen)
Chemical reaction resulting in the formation of a synthesis gas or “syngas”
Gasification is not combustion
Commercially proven technology

4. IGCC Syngas Combustible gas typically consisting of mostly CO and H2
Heating value generally between 125 and 275 BTU/ft3 (Natural Gas = 1,000 BTU/ft3)
Capability to remove particulate, nitrogenous compounds, sulfur, and mercury from syngas prior to its end use

5. IGCC Combined Cycle Power Generation
Power is generated by combusting fuel (natural gas, fuel oil, syngas, etc.) in a Combustion Turbine
Very hot exhaust gas from the turbine discharges to a Heat Recovery Steam Generator (HRSG)
Steam raised in the HRSG is expanded through a Steam Turbine which generates additional power
Very efficient method of power generation

6. IGCC Advantages of IGCC
Fuel diversity – Potentially wide range of feed stocks
More efficient than traditional pulverized coal technology
Improved NOX, SO2 and Mercury removal than traditional pulverized coal technology
Lower CO2 than traditional pulverized coal technology, with greater potential for future CO2 capture
Marketable byproducts

7. Power Systems Development Facility (Wilsonville, AL)
“America’s Advanced Coal Research Center”

8. PSDF
Established in 1996
Supports DOE’s effort to develop cost-competitive and environmentally acceptable coal-based power generation technologies
Designed at a size that can be reliably scaled up to commercial applications
Development of the Transport Gasifier

9. Current Cost Share Partners
PSDF
Current Cost Share Partners
US DOE- National Energy Technology Laboratory (NETL)
Southern Company
Electric Power Research Institute (EPRI)
KBR
Peabody Energy
Lignite Energy Council

10. Transport Gasifier Attributes / Features
Disengager
Syngas to Cooling
and Cleanup
Air
Mixing
Zone
Riser
Cyclone
Standpipe
J-leg
Startup
Burner
Steam
Coal
Loopseal
Performs well on low rank & high ash/high moisture coals
Simple Design:
Operates air-blown for power generation
No burners, Simple and limited internal parts
Low operating temperature
The Transport Gasifier at the PSDF has operated for 16,500 hours with >13,200 hours on-coal and >8,200 hours in gasification mode

11. Kemper County IGCC Location Kemper County, MS Near Liberty
Meridian
Liberty
Location
Kemper County, MS
Near Liberty
Approximately 20 miles north of Meridian, MS

12. Kemper County IGCC Project Facts
First-of-a-kind plant based on the transport gasifier developed at the Power Systems Development Facility (PSDF)
Approximately 550 MW integrated gasification combined cycle (IGCC) power plant
Owned and operated by Mississippi Power Company
Startup proposed in 2013

13. Kemper County IGCC Project Facts (Continued)
Fueled by lignite from nearby mine (to be operated by North American Coal)
Also capable of using natural gas
IRS awarded the project $133 million in Investment Tax Credits (ITC)
Other DOE funding is possible

14. Kemper County IGCC Project Facts (Continued) 2 gasifiers (Transport)
2 gas cleanup systems (particulate, nitrogenous compounds, sulfur, mercury)
2 combustion turbines (GE 7F) / heat recovery steam generators
1 steam turbine

15. Kemper County IGCC S T A C K Gasifier Lignite / Air Gas Clean Up
SULFUR
AMMONIA
ASH
EXHAUST GAS
Gasifier
Lignite / Air
Gas
Clean Up
Combustion
Turbine
Heat Recovery
Steam Generator
ELECTRICITY
SYNGAS
Steam
Turbine
STEAM
ELECTRICITY
Gasifier
Lignite / Air
Gas
Clean Up
Combustion
Turbine
Heat Recovery
Steam Generator
SYNGAS S T A C K
EXHAUST GAS
ASH
SULFUR
AMMONIA
Preliminary DRAFT 11/2007

16. Why Coal? U. S. Has More Coal Than Any Other Nation
Kemper County IGCC
Why Coal? U. S. Has More Coal Than Any Other Nation

17. Kemper County IGCC What Is Lignite? Very high moisture
Lignite is young coal
Very high moisture
Low energy value or “Btu” content
Only economical to transport short distances

18. Kemper County IGCC Lignite Partnering with North American Coal (NAC)
NAC is largest lignite miner in the U.S.
Operates Red Hills mine in Ackerman, MS.

19. Kemper County IGCC Environmental Permitting/NEPA Activities
PSD Application was submitted to MDEQ in December, 2007
DOE will be preparing an Environmental Impact Statement (EIS)
Construction is expected to begin in 2010
Operation of the facility is expected in 2013

20. Questions?