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Kemper County energy facility

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Mississippi

Power

Southern

Company

Customers 188,000 4.4 Million

Generating

Capacity3,200 MW 46,000 MW

Employees 1,300 26,000

Mississippi Power is part of Southern Company

Chevron

CoGen(1966)

Age: 48

Plant

Sweatt

(1951)

Age: 63

Plant

Eaton(1945)Age: 69

Greene

County

Plant(1965)

Age: 49

Plant

Daniel(1977)

Age: 37

Plant

Watson(1957)

Age: 57

Kemper County

IGCC

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Trade Secret - Confidential and Proprietary to Mississippi Power Company and Southern Company

75%

Natural

Gas

25%

Coal

75%

Natural

Gas

25%

Coal

50%

Natural

Gas

25%

Coal

25%

Lignite

MPC 2020 energy mix withoutKemper

MPC 2020 energy mix with Kemper

Why Build Kemper?

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Trade Secret - Confidential and Proprietary to Mississippi Power Company and Southern Company

Compared to natural gas, lignite prices arepredictable and stable

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Trade Secret - Confidential and Proprietary to Mississippi Power Company and Southern Company

Mississippi Lignite is key to Kemper Project

Kemper County IGCC

Estimated 4 billion mineable tons

~185 million tons needed for life of theKemper Project

~ 5,200 Btu/lb ~ 45% moisture

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Trade Secret - Confidential and Proprietary to Mississippi Power Company and Southern Company

Kemper County IGCC Overview 2x1 Integrated Gasification Combined Cycle

(IGCC) 2 Transport Gasifiers

2 Siemens SGT6 - 5000F CTs

1 Toshiba Steam Turbine

582 MW peak

65% CO2capture equivalent to Natural Gas CC

Project Information 6,000 support personnel onsite

Approx. 300 Southern Company employees

Mine Mouth Lignite

ZLD & uses treated effluent from Meridian as makeup water

COD 4thQtr 2014

Mine

Commercial operation June 5, 2013

Dragline in-service this fall

Plant Site

Plant Site

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Meridian Treated Effluent

Zero Liquid Discharge Facility

65% Carbon Capture ~ 3,500,000 tons/yr

Sulfuric Acid ~ 150,000 tons/yr

Anhydrous Ammonia ~19,000 tons/yr

Environmental Benefits

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Mississippi's economy isbenefiting today and will

benefit for decades to

come because of theKemper County energy

facility.

Mississippis economy benefits

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Power Systems

Development Facility Joint effort of DOE, Southern

Company, KBR, EPRI

TRIGTM

development Air blown versus oxygen blown

Lower temperatures

Works well with lignite

Premier advanced coal

generation R&D facility

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Transmission

Water Pipeline

Natural Gas Pipeline

CO2Pipeline

Plant Site

Kemper

Infrastructure

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Kemper Summary Schedule

DETAILED DESIGN

MAJOR EQUIPMENT

SITEWORK

PILINGS/FOUNDATION

GASIFIER CONSTRUCTION

CC CONSTRUCTION

CC START-UP NG

GASIFIER START-UP

LIGNITE DELIVERY FACILITY

MINE DESIGN/PERMIT

MINE CONSTRUCTION

TRANSMISSION

NEED/CERTIFICATE

FEED

COD

2006 2010 2011 2012 2013 20142007 2008 2009 2015

Completed Task

In-Progress

Milestone

Schedule Legend

CC

SYNGAS

CO2 PIPELINE

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Fluid BedDryer

System

SulfuricAcid

Production

CO2and H2S

Removal

Gas

TurbinesHRSGs

Steam

Turbine

Process Air

Compressors

HP Coal

Feeders

Gasifiers (2)

NitrogenPlant

Ammonia

Production

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TransportGasifier

Lignite

Feed

System

HTHP

Particulate

Filter

Gas Turbine/Generator

SteamTurbine/Generator

Air Compressors

SyngasCooler

HRSGwith SCR

Sulfur, Ammonia, and CO2

Removal

Mercury

Removal

CO2 Compressor

Simplified Diagram of IGCC with CO2 Capture

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Integrated Gasification Combined Cycle

Stack

Steam Turbine

To CondenserC GTHRSGHRSG

Air

Feedwater

Air

Natural Gas

Burner

Pre-combustion gas

treatment allows for

maximum performance

while keeping equipment

size to a minimum.

Syngas

Coal

PCD

AshCollection

Fine

Ash

Coarse Ash

SyngasCoolingSteam

SyngasCleanup

Ammonia

Byproduct

Sulfur

Byproduct

Carbon DioxideByproduct

Syngas Cooler

Steam

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Basic Syngas Cleanup Scheme for Kemper

CO + H2O H2 + CO2

Puts energy in hydrogen

rather than CO.

COS + H2O H2S + CO2

Syngas Exiting Gasifier PCDWater-Gas-Shift

Reactor

Fine Ash

COS

Hydrolysis

Reactor

Steam

Ammonia

Scrubber

Sour Water

Sour Syngas Selexol

Sweet Syngas

CO2

Acid Gas

Mercury

AdsorberHg Syngas

WSA

Process

Collected in

Carbon Bed

Sales

Sulfuric Acid Sales

Gas Turbine

Sour Water

TreatmentNH3

Water

Sales

Recycled

to Plant

Flue Gas

Stack Gas

Many of these processes are complex, and some

composed of several pieces of equipment!

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Basic Syngas Cleanup Scheme for Kemper

CO + H2O H2 + CO2

Puts energy in hydrogen

rather than CO.

COS + H2O H2S + CO2

Syngas Exiting Gasifier PCDWater-Gas-Shift

Reactor

Fine Ash

COS

Hydrolysis

Reactor

Steam

Ammonia

Scrubber

Sour Water

Sour Syngas Selexol

Sweet Syngas

CO2

Acid Gas

Mercury

AdsorberHg Syngas

WSA

Process

Collected in

Carbon Bed

Sales

Sulfuric Acid Sales

Gas Turbine

Sour Water

TreatmentNH3

Water

Sales

Recycled

to Plant

Flue Gas

Stack Gas

Many of these processes are complex, and some

composed of several pieces of equipment!

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Sulfuric Acid (H2SO4)

~150,000 Tons/yr

Ammonia (NH3)

~19,000 Tons/Yr

CO2@ 65% capture

~3,500,000 Tons/Yr

Combined Cycle

20/day

4/day

Gasifier

Annual By-product Production

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Main Haul Road

(0.6 mi.)

Initial Box Cut

Uncovered

Lignite

Office/Shop/

Warehouse

Main Mine

Entrance

Dragline

Construction

Reservoir

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Construction Progress April 2014

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Construction Progress Early Fall 2010

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Construction Progress Early Fall 2011

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Construction Progress Early Fall 2012

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Trade Secret - Confidential and Proprietary to Mississippi Power Company and Southern Company

Construction Progress January, 2014

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Questions

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Questions?Questions