© Metso November 2, 2010February 8, 20101

Gasification aspretreatment of solid

fuel for combustion inPC and gas fired boilers

© Metso

Metso is a global supplier of sustainabletechnology and services

• Our customers operate mainlyin the following industries:

- Mining

- Construction

- Power generation

- Oil and gas

- Recycling

- Pulp and paper

• About 27,000 employeesin over 50 countries

• 2009 net sales 5.0 billion euros

• Shares listed on NASDAQ OMXHelsinki Ltd.

2

© Metso

Global network organized bycustomer industry-specific business lines

Mining andConstructionTechnology

Energy andEnvironmentalTechnology

Paper and FiberTechnology

CEO andGroup HeadOffice

CUSTOMERS

Fiber business line

Power business line

Automation businessline

Paper business line

Tissue business lineRecycling businessline

Equipment andSystems business line

Services businessline

Metso Network

3

Fabrics business line

© Metso

Energy and Environmental Technology

Products and services

• Boiler plants, biomass power plants and environmentalprotection equipment

• Energy and process industry automation and informationmanagement application networks and systems

• Production process measurement systems andanalyzers

• Control valves and smart shut-off valves• Metal and solid-waste recycling equipment• Knowledge-based services

Customers

• Power generation industry, oil and gas industry, pulp andpaper industry, and recycling industry 35%

Services as a % of netsales

Net sales in 2009EUR 1,523 million

By customer industry

43% Power generation

26% Oil and gas

13% Recycling

18% Pulp and paper

4

© Metso

History of Gasification in Metso Power

TAMPELLA POWER

ENVIROPOWER

Founded by Tampella Power and Vattenfall 1992• Upkeep Gasification know-how• Now owned by Metso Power

GÖTAVERKENTampere pilot plant•15 MWth pressurized FB gasifier• Biomass and coal gasification development• Hot gas cleaning development

METSO POWER

CFB GASIFIER

Atmospheric CFB gasification development• Värö lime kiln gasifier 1987

NEW DEVELOPMENT ACTIVITY• Initiated 2002• Biomass gasification for limekilns• Biomass gasification for power production• Waste gasification• Fuel drying• Gas cleaning

METSO CFB /BFBBoiler experience• Fuel handling• Ash handling•Refractory experience

5

© Metso

Biomass gasifier for a lime kiln – someexperiences

• A lime kiln can easily be switchedover to use gasified biomass

• The size is usually large enough tomake this solution economicallyviable

• Fuel is normally available in a mill

• During the second oil crisis in the1980s, several gasifiers were builtto replace oil with biomass

• At Värö, Södra Cell, Sweden, aMetso (Götaverken) gasifier hasbeen used since 1987

=> Over 20 years of industrialexperience

6

© Metso

Clean biomass co-firing in a PC boiler

Several potential bio cases-Clean biomass as fuel=>no gas cleaning

-Easy boiler modification- Short downtime- Bio ash not contaminated- 50 -200 MW size

7

© Metso

Co-firing of waste for a PC boiler

Case- Pulverized coal or peat firing- Reheat boiler or OTU boilers also possible- Min load with gas only- Full load gas +coal/peat-The share of fuel input to gasifier can befreely selected

8

© Metso

Waste/bio gasification for a gas boiler

9

© Metso

Gasification for production of SNG

10

Process picture from GoBiGas

Gasification

Methanation

Gasifier Combustor

Tar removalSulphurremoval

Fuel handling

CO2-removal

DryerSteam

DryingUpgradingBiomethan

e

Shift

Air

Steam

Flue gas

Woodpellets

Bedmateria

l

Tar removal

Forestresidue

s

Methanation

Bag filterDe-NOx

Tar

Sulphur rich gas

Airpreheate

r

Hotwater

Hotwater

CO2 to inert

gas sys tem/

atm

Tar

© Metso

Co-firing is an efficient way to use biomass

Assume there is 100 MW bio fuel available at the district .

100 MW, fuelSmall boilerefficiency 25 %

25 MWgreen electricity

100 MW, fuelLarge boilerefficiency 40 %

40 MWgreen electricity+160 MWcoal electricity400 MW coal

The final outcome is 60 % moregreen electricity !

11

© Metso

KUVO belt dryer for biomass

WET BIOMASS IN

EXHAUST AIREVAPORATED WATER

FRESH AIR INHOT WATER OR STEAM

DRY BIOMASS OUT

12

© Metso

Fuel systems for waste FeedingMaster

Metering fuel feeder

Rotary vane feeder

Fuel chute

Internal fuel feed assembly

13

© Metso

Cleaning gas from waste

Process concept:

• Gasify waste at 850-900 C

• Cool it down to about 400 C- all corrosive components, alkalichlorides, Pb, Zn will be in solid form

• Filter all dust out so the resulting gas is clean

• Burn clean gas in gas fired boiler

1. Fuel handling2. Gasifier3. Gas cooling4. Gas filter5. Gas fired boiler

1.

2.

3.

4.

5.

1,E-0 9

1,E-0 8

1,E-0 7

1,E-0 6

1,E-0 5

1,E-0 4

1,E-0 3

35

0

37

03

90

41

0

43

04

50

47

04

90

51

0

53

05

50

57

0

59

06

10

63

0

65

06

70

69

0

71

07

30

75

0

77

07

90

81

0

83

08

50

87

0

89

09

10

93

0

95

09

70

99

0

101

010

30

105

0

107

010

90

111

0

113

011

50

117

0

119

0

Temperat ure [C]

log

p

AC/GAS/NaCl -

AC/GAS/KCl -

AC/GAS/Zn Cl2 -

AC/GAS/Pb Cl2 -

Satur ate d stea m- Na2SO4( g)

Satur ate d stea m- K2 SO 4(g )

Satur ate d stea m- ZnCl2 (g)

Satur ate d stea m- Pb Cl2(g)

Satur ate d stea m- KCl( g)

Satur ate d stea m- NaCl(g)

AC/GAS/Na2SO4

AC/GAS/K2 SO 4

AC/GAS/Pb O

AC/GAS/Zn O

Th

isp

art

go

es

toso

lid

an

dw

ill

be

cap

ture

db

yth

efi

lter

!

14

© Metso15

All water walls cooled with boiler feed water•Avoid risk of corrosion in cooler

•T materials low enough• Condensate corrosive components on particles

• T gas low enough before filter•Avoid tar condensation in cooler

• T material is high enough•Still reasonable size cooler to reach right gastemperature

Key components - Cooler

Operational windowto clean out corrosivecompounds

© Metso16

High temperature fabric filter• Industrial scale tests in Värö /Sweden

• Filter can tolerate temperatures up to 600 C•Tar condensation can be avoided above 250 C• Filter can be recovered if needed

Key components - Filter

Operational windowfor filter

© Metso17

FILTERGASCOOLER

ASH CONTAINER

AIR

TO

GA

SIF

IER

Filter test in Värö 2009

© Metso

Lahti Energia – KYVO 2 :Industrial scale, 2x80 MW,solid waste gasification technology demonstration

18

1. Fuel handling2. Gasifier3. Gas cooling4. Gas filter5. Gas boiler and

flue gas cleaning

Total Investment157 M€

Start up April 2012(commercial operation)

1.

2. 3.

4.

5.

Old PCboiler

Waste fuel handling

Gas cooler

Gasifier

Gas boilerand APC

Computer simulated aerial view of the plant

© Metso

TRUE COMMERCIAL TECHNOLOGY

COMMERCIALLY READY

FULL SCALE DEMO

PILOT SCALE

LAB SCALE

Gasification - Life Cycle Position

19

© Metso

Thank you