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Mississippi Power Kemper County IGCC Plant

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Title: Mississippi Power Kemper County IGCC Plant


1
Mississippi PowerKemper County IGCC Plant
  • 2008 Southern Section AWMA
  • 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)
Americas Advanced Coal Research Center
http//psdf.southernco.com
8
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

9
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
  • 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

11
Kemper County IGCC
  • 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
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
16
Why Coal? U. S. Has More Coal Than Any Other
Nation
17
  • What Is Lignite?
  • 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
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