Peterhead CCGT Proposed CCS DemoJeremy CareyTechnology Manager, SSE Generation

14th March 2011

SSE Background

Strategy“To deliver sustained real growth in the dividend payable to shareholders through the efficient operation of, and investment in, a balanced range of economically-regulated and market-based energy businesses.”

Generation

Customers

Networks

Services

As of 8/3/10

• British Isles ‘pure play’Onshore gas storage 4900 MW of gas & oil4360 MW of coal2300 MW of renewables~1500 staff (SSE plc >20k)

SSE - Generation

SSE’s Carbon Reduction GoalTo reduce the carbon-intensityof electricity from SSE power stations by 50% between 2005/6 and 2020 (<300gCO2/kWh)

Why a Gas CCS Demonstration?• Energy Security

Need flexible plant for dynamic security Attractive forward gas pricesNeed to add capacity soon

• Climate ChangeGas >50% of 2020 UK TWhrs? Gas+CCS <50g/kWhrCoal <20% of 2020 UK TWhrs? Coal+CCS <80g/kWhr

• Fuel PovertyGas+CCS has lower LCOE than Coal+CCS?

• Different Technology Development ChallengesDemonstrated on Coal = Proven on Gas

Key Gas Capture Challenges

• CO2 Concentration and “85/90% Capture”• Gas <4%; Coal >12%• Taller, wider absorber tower• Capture Plant is more costly on gas

• O2 Concentration • Gas >10%; Coal~6%• O2 accelerates solvent degradation• Solvent management costs higher

• GT Backpressure• Must be avoided!

Disused HC Field

Peterhead Project Location

Peterhead Power Station

• 1970’s 2 x 660MW Rankine cycle, HFO fired• 1980’s HFO and gas • 1990’s Miller gas boiler conversion• 1990’s 2 x 120MW OCGTs• 1990’s NTS gas connection (3 gas supplies)• 2000 Repowering Project “Block 1”

• 3 x Siemens V94.3A GTs

• NTS gas fired

• Re-used existing ST

NER Proposal: Key Parameters• Retrofit capture to a single GT (~385MWe in CC mode)

• Post Combustion (amine)

• Offshore storage in known HC field ~10 million te CO2 over 10 yearsShell, CO2DeepStore / Petrofac

• Re-use of existing pipelines

• Ultra clean fossil energy (< 50 g/kWhr)

• Baseload Operation

• Deliverable to NER timescales (2016)

Process Overview

Steam Turbine

Gas Turbine HRSG

DCC Absorber Stripper Compression& Dehydration

CleanFlue Gas

Rich Solvent

CO2FlueGas

Steam

Electrical EnergyGenerator

Steam

Onshore Pipeline

St Fergus Compressor

Offshore Pipeline

Peterhead

St Fergus Gas Terminal

Goldeneye Platform

Lean Solvent

Shell / Offshore Store

Xmas Tree

Existing Equipment

New Equipment

Change of Use

Key

Onshore Pipeline

St Fergus Compressor

Offshore Pipeline

Lean Solvent

Shell / CO2DS

Existing Equipment

New Equipment

Change of Use

Key

GasSupply

Grid Connection

Pore Space

Injection Manifold

Well Completion

Pressure Control

CO2

Gas Turbine

Steam TurbineHRSG

DCC Absorber Stripper Compression& Dehydration

Generator

Xmas Tree

A Deliverable Project…• Existing CCGT station

• Existing Grid Connection• Existing fuel supply• Existing work force• Existing utility capacity• Existing available land• Precedent Planning Consent (DF1)

• Existing Transport Infrastructure• Existing CO2 export infrastructure

• Existing HC storage site

• Station Manager Commitment• CEO Commitment

But DECC or NER+DECC funding required

Questions?

“Peterhead is probably the best site in the country for a ~300MWe demo CCS retrofit project on a gas fired power station”

Prof Jon Gibbins