Mississippi Power Kemper County IGCC Plant

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Mississippi PowerKemper County IGCC Plant

• 2008 Southern Section AWMA
• Annual Meeting and Technical Conference

Scott McMillan Southern Company Services
Keith Benvenutti Mississippi Power Company
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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.

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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

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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

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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

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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

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Power Systems Development Facility (Wilsonville,
AL)
Americas Advanced Coal Research Center
http//psdf.southernco.com
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PSDF

• Established in 1996
• Supports DOEs 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

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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

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Transport Gasifier Attributes / Features

• 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 gt13,200 hours on-coal and
  gt8,200 hours in gasification mode

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Kemper County IGCC

• Location
• Kemper County, MS
• Near Liberty
• Approximately 20 miles north of Meridian, MS

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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

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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

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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

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Kemper County IGCC
S T A C K
SULFUR AMMONIA
ASH
EXHAUST GAS
Heat Recovery Steam Generator
ELECTRICITY
SYNGAS
Steam Turbine
STEAM
ELECTRICITY
Heat Recovery Steam Generator
SYNGAS
S T A C K
EXHAUST GAS
SULFUR AMMONIA
ASH
Preliminary DRAFT 11/2007
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Why Coal? U. S. Has More Coal Than Any Other
Nation
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• What Is Lignite?
• Lignite is young coal
• Very high moisture
• Low energy value or Btu content
• Only economical to transport short distances

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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.

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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

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Questions?