21st-Century Technology | About Energy | Mississippi Power | A Southern Company

21st-Century Technology

Why Build a Power Plant?

Mississippi's electric power needs are growing. The last time Mississippi Power built a baseload power plant was more than 35 years ago. We need a new baseload plant to meet the future energy needs of Mississippi. The Kemper County energy facility will help us continue to meet our customers' electricity needs for decades.

State-of-the-Art Technology

The Kemper County energy facility is a 21st-century integrated gasification combined cycle (IGCC) design called TRIGTM. IGCC converts lignite coal to synthesis gas. The lignite is sent through a device called a gasifier where it undergoes a chemical reaction creating a synthesis gas. The gas is then used to generate power by firing it in a gas turbine.

TRIG was developed over the last two decades at the Power Systems Development Facility (PSDF) in Wilsonville, Ala. - a research facility for the department of energy and Southern Company.

A unique feature of TRIG is the high-efficiency design that sends lignite not converted to gas in the initial process back for a second round of gasification. This allows a high rate of lignite-to-gas conversion to take place at a lower temperature - and thus lower cost - than what's possible with other available gasification technologies.

TRIG produces gas that can be used to generate electricity while making it easier to remove emissions, such as carbon dioxide, that otherwise would end up in the atmosphere.

The innovative technology at Kemper is truly state of the art. The technology, designed by Southern Company and partners KBR and the U.S. Department of Energy was tested at the National Carbon Capture Center in Wilsonville, Ala. With today's demands for lower carbon emissions, Kemper's innovative technology is leading the way.

TRIG Facts:

  • TRIG is a superior coal-gasification method.
  • TRIG can use lignite, which accounts for more than half of the world's vast coal reserves. It offers a simpler and more robust method than most existing coal-gasification technologies.
  • TRIG also produces more power and offers lower operation and maintenance costs than what is possible with other available gasification technologies.
  • With TRIG the Kemper plant will turn Mississippi lignite into a clean gas while reducing emissions of sulfur dioxide, nitrogen oxides, carbon dioxide and mercury. The technology will reduce carbon dioxide emissions by at least 65 percent.
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Why Kemper County?

Mississippi Power performed a comprehensive assessment of numerous sites in the state for the potential addition of an integrated gasification power plant to serve customers. The best site was in Kemper County, Mississippi.

Kemper County was selected because it:

  • Takes advantage of an untapped natural resource - Mississippi lignite, giving Mississippi Power access to a fuel not subject to significant transportation costs or market volatility.
  • Helps balance the electric demand and strengthens electric reliability in Mississippi.
  • Provides an inland location for Mississippi Power's first new baseload plant in 35 years.
Why Kemper Large